Document and Entity Information	9 Months Ended
Document and Entity Information	Sep. 30, 2015	Oct. 23, 2015
Document Information [Line Items]
Trading Symbol	ALGN
Entity Registrant Name	ALIGN TECHNOLOGY INC
Entity Central Index Key	0001097149
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		79,490,148

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
In Thousands, except Per Share data, unless otherwise specified

3 Months Ended

9 Months Ended

Sep. 30, 2015

Sep. 30, 2014

Sep. 30, 2015

Sep. 30, 2014

Income Statement [Abstract]

Net revenues

$ 207,636

^[1]

$ 189,876

^[1]

$ 615,210

^[1]

$ 563,053

^[1]

Cost of net revenues

50,060

44,822

147,910

135,272

Gross profit

157,576

145,054

467,300

427,781

Operating expenses:

Selling, general and administrative

101,751

80,653

290,657

246,175

Research and development

17,779

12,854

47,348

39,523

Total operating expenses

119,530

93,507

338,005

285,698

Income from operations

38,046

51,547

129,295

142,083

Interest and other income (expenses), net

(1,568)

(1,999)

(2,846)

(1,491)

Net income before provision for income taxes

36,478

49,548

126,449

140,592

Provision for income taxes

8,862

11,301

31,306

34,301

Net income

$ 27,616

$ 38,247

$ 95,143

$ 106,291

Net income per share:

Basic (in usd per share)

$ 0.35

$ 0.47

$ 1.19

$ 1.31

Diluted (in usd per share)

$ 0.34

$ 0.47

$ 1.17

$ 1.29

Shares used in computing net income per share:

Basic (in shares)

79,808

80,629

80,173

80,924

Diluted (in shares)

81,092

82,014

81,576

82,443

[1]	Net revenues are attributed to countries based on location of where revenue is recognized.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 27,616	$ 38,247	$ 95,143	$ 106,291
Net change in cumulative translation adjustment	114	(257)	(95)	(155)
Change in unrealized gains (losses) on available-for-sale securities, net of tax	98	(191)	260	(81)
Other comprehensive income (loss)	212	(448)	165	(236)
Comprehensive income	$ 27,828	$ 37,799	$ 95,308	$ 106,055

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References+ Details

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 174,040	$ 199,871
Marketable securities, short-term	310,715	254,787
Accounts receivable, net of allowances for doubtful accounts and returns of $1,803 and $1,563, respectively	148,395	129,751
Inventories	18,939	15,928
Prepaid expenses and other current assets	29,554	19,770
Deferred Tax Assets, Net, Current	30,090	37,053
Total current assets	711,733	657,160
Marketable securities, long-term	145,246	147,892
Property, plant and equipment, net	120,738	90,125
Goodwill and intangible assets, net	79,715	82,056
Deferred tax assets	14,542	3,099
Other assets	7,588	7,665
Total assets	1,079,562	987,997
Current liabilities:
Accounts payable	32,599	23,247
Accrued liabilities	95,914	87,880
Deferred revenues	115,998	90,684
Total current liabilities	244,511	201,811
Taxes Payable	34,916	30,483
Other long-term liabilities	1,876	2,932
Total liabilities	281,303	235,226
Commitments and contingencies (Note 6 and 7)
Stockholders' equity:
Preferred stock, $0.0001 par value (5,000 shares authorized; none issued)	0	0
Common stock, $0.0001 par value (200,000 shares authorized; 79,564 and 80,205 issued and outstanding, respectively)	8	8
Additional paid-in capital	810,116	783,410
Accumulated other comprehensive income (loss), net	25	(140)
Accumulated deficit	(11,890)	(30,507)
Total stockholders’ equity	798,259	752,771
Total liabilities and stockholders’ equity	$ 1,079,562	$ 987,997

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Accounts receivable, allowance for doubtful accounts and returns	$ 1,803	$ 1,563
Preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued	0	0
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	79,564	80,205
Common stock, shares outstanding	79,564	80,205

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 95,143	$ 106,291
Adjustments to reconcile net profit to net cash provided by operating activities:
Deferred taxes	4,017	20,870
Depreciation and amortization	13,141	13,469
Stock-based compensation	39,135	29,348
Excess tax benefit from share-based payment arrangements	(8,663)	(18,887)
Other non-cash operating activities	9,252	7,368
Changes in assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	(27,123)	(24,930)
Inventories	(3,033)	(2,033)
Prepaid expenses and other assets	(2,529)	(2,349)
Accounts payable	4,408	3,788
Accrued and other long-term liabilities	6,712	12,402
Deferred revenues	28,182	9,957
Net cash provided by operating activities	158,642	155,294
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property, plant and equipment	(36,663)	(16,957)
Purchase of marketable securities	(306,938)	(350,611)
Proceeds from maturities of marketable securities	238,412	124,101
Proceeds from sales of marketable securities	12,518	72,276
Other investing activities	46	(182)
Net cash used in investing activities	(92,625)	(171,373)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	10,559	17,373
Common stock repurchases	(90,603)	(77,417)
Excess tax benefit from share-based payment arrangements	8,663	18,887
Employees’ taxes paid upon the vesting of restricted stock units	(17,574)	(5,761)
Net cash used in financing activities	(88,955)	(46,918)
Effect of foreign exchange rate changes on cash and cash equivalents	(2,893)	720
Net decrease in cash and cash equivalents	(25,831)	(62,277)
Cash and cash equivalents, beginning of the period	199,871	242,953
Cash and cash equivalents, end of the period	$ 174,040	$ 180,676

Summary of Significant Accounting Policies	9 Months Ended
Summary of Significant Accounting Policies	Sep. 30, 2015
Notes To Financial Statements [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of presentation The accompanying unaudited Condensed Consolidated Financial Statements have been prepared by Align Technology, Inc. (“we”, “our”, or “Align”) in accordance with the rules and regulations of the Securities and Exchange Commission ("SEC") and contain all adjustments, including normal recurring adjustments, necessary to present fairly our results of operations for the three and nine months ended September 30, 2015 and 2014, our comprehensive income for the three and nine months ended September 30, 2015 and 2014, our financial position as of September 30, 2015 and our cash flows for the nine months ended September 30, 2015 and 2014. The Condensed Consolidated Balance Sheet as of December 31, 2014 was derived from the December 31, 2014 audited financial statements. Net revenues by geographic area for prior period amounts in Note 12 have been reclassified to conform with the current period presentation. These reclassifications had no impact on our financial position for the three and nine months ended September 30, 2015 and 2014. The results of operations for the three and nine months ended September 30, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015 or any other future period, and we make no representations related thereto. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” “Quantitative and Qualitative Disclosures About Market Risk” and the Consolidated Financial Statements and notes thereto included in Items 7, 7A and 8, respectively, in our Annual Report on Form 10-K for the year ended December 31, 2014. Use of estimates The preparation of financial statements in conformity with generally accepted accounting principles ("GAAP") in the United States of America (“U.S.”) requires our management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. On an ongoing basis, we evaluate our estimates, including those related to the fair values of financial instruments, long-lived assets and goodwill, useful lives of intangible assets and property and equipment, revenue recognition, stock-based compensation, income taxes, and contingent liabilities, among others. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Revenue Recognition In July 2015, we launched a new product policy called "Additional Aligners at No Charge" that addressed one of our customers' top complaints. Previously, we charged customers for additional aligners ordered beyond those covered by the initial treatment plan. With this product policy change, we no longer distinguish between mid-course corrections and case refinements and allow doctors to order additional aligners to address either treatment need at no charge. As part of this change, we also grandfathered over one million open cases under this product policy change. These changes were effective for all new Invisalign Full, Teen, and Assist treatments shipped worldwide after July 18, 2015 as well as any open Invisalign Full, Teen and Assist cases as of that date. We concluded that additional aligners is a separate unit of accounting in our treatment plans, similar to case refinement and mid-course correction. We determined the best estimated selling price (“BESP”) of additional aligners based on a cost and margin analysis, as well as other inputs based on our historical pricing practices. Further, we will continue to allocate revenue to each unit in our treatment plan based on the unit's relative selling price based on BESP and recognize the revenue upon the delivery of each unit in the treatment plan. We regularly review our estimates of selling price and maintain internal controls over the establishment and update of these estimates. Derivative Financial Instruments In September 2015, we entered into foreign currency forward contracts to minimize the short-term impact of foreign currency exchange rate fluctuations on cash and certain trade and intercompany receivables and payables. These forward contracts are not designated as hedging instruments and do not subject us to material balance sheet risk due to fluctuations in foreign currency exchange rates. The gains and losses on these forward contracts are intended to offset the gains and losses in the underlying foreign currency denominated monetary assets and liabilities being economically hedged. We do not enter into foreign currency forward contracts for trading or speculative purposes. These instruments are marked to market through earnings every period and generally are one month in original maturity. The net gain or loss from the settlement of these foreign currency forward contracts is recorded in Interest and other income (expense), net in the consolidated statements of operations. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-09, “Revenue from Contracts with Customers,” requiring an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The updated standard will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective and permits the use of either the retrospective or cumulative effect transition method. In July 2015, the FASB voted to defer the effective date for annual reporting periods beginning after December, 15, 2017 (including interim reporting periods within those periods) and permitted early adoption of the standard, but not before the original effective date of December 15, 2016. We expect the updated standard to become effective for us in the first quarter of fiscal 2018. We have not yet selected a transition method and we are currently evaluating the effect that the updated standard will have on our consolidated financial statements and related disclosures. In April 2015, the FASB issued ASU No. 2015-05, "Customer's Accounting for Fees Paid in a Cloud Computing Arrangement." providing guidance to entities about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, the entity should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the entity should account for the arrangement as a service contract. The new guidance does not change the accounting for an entity's accounting for service contracts. The updated standard becomes effective for interim and annual reporting periods beginning after December 15, 2015. We are currently evaluating the effect that the updated standard will have on our consolidated financial statements and related disclosures.

- Definition

The entire disclosure for all significant accounting policies of the reporting entity.

+ References+ Details

Marketable Securities and Fair Value Measurements

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Marketable Securities and Fair Value Measurements

Note 2. Marketable Securities and Fair Value Measurements

As of September 30, 2015 and December 31, 2014, the estimated fair value of our short-term and long-term marketable securities, classified as available for sale, are as follows (in thousands):

Short-term



September 30, 2015	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Commercial paper	$	35,938	$	—	$	—		$	35,938
Corporate bonds	176,901		45		(84		)	176,862
Municipal securities	11,694		4		—			11,698
U.S. government agency bonds	58,003		36		—			58,039
U.S. government treasury bonds	27,649		17		—			27,666
U.S. dollar dominated foreign corporate bonds	513		—		(1		)	512
Total Marketable Securities, Short-Term	$	310,698	$	102	$	(85	)	$	310,715

Long-term



September 30, 2015	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. government agency bonds	$	37,733	$	43	$	—		$	37,776
Corporate bonds	54,808		28		(121		)	54,715
U.S. dollar dominated foreign corporate bonds	—		—		—			—
U.S. government treasury bonds	38,741		84		—			38,825
Municipal securities	7,372		17		—			7,389
Asset-backed securities	6,544		—		(3		)	6,541
Total Marketable Securities, Long-Term	$	145,198	$	172	$	(124	)	$	145,246

Short-term



December 31, 2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Commercial paper	$	33,998	$	—	$	—		$	33,998
Corporate bonds	152,055		27		(116		)	151,966
U.S. dollar dominated foreign corporate bonds	901		—		—			901
Municipal securities	9,147		13		—			9,160
U.S. government agency bonds	41,574		14		(1		)	41,587
U.S. government treasury bonds	15,770		7		—			15,777
Certificates of Deposits	1,398		—		—			1,398
Total Marketable Securities, Short-Term	$	254,843	$	61	$	(117	)	$	254,787

Long-term



December 31, 2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. government agency bonds	$	48,233	$	12	$	(28	)	$	48,217
Corporate bonds	57,195		6		(112		)	57,089
U.S. dollar dominated foreign corporate bonds	523		—		(2		)	521
U.S. government treasury bonds	20,814		5		(6		)	20,813
Municipal securities	9,552		5		(6		)	9,551
Asset-backed securities	11,713		—		(12		)	11,701
Total Marketable Securities, Long-Term	$	148,030	$	28	$	(166	)	$	147,892

For the three and nine months ended September 30, 2015 and 2014, realized gains were immaterial. Unrealized gains and losses for our available for sale securities as of September 30, 2015 and December 31, 2014 were also immaterial. Cash and cash equivalents are not included in the table above as the gross unrealized gains and losses are not material. We have no material short-term or long-term investments that have been in a continuous unrealized loss position for greater than twelve months as of September 30, 2015 and December 31, 2014. Amounts reclassified to earnings from accumulated other comprehensive income related to unrealized gain or losses were immaterial for the three and nine months ended September 30, 2015 and 2014.

Our fixed-income securities investment portfolio consists of corporate bonds, certificates of deposits, U.S. dollar dominated foreign corporate bonds, commercial paper, municipal securities, U.S. government agency bonds, U.S. government treasury bonds and asset-backed securities that have a maximum maturity of 27 months. The securities that we invest in are generally deemed to be low risk based on their credit ratings from the major rating agencies. The longer the duration of these securities, the more susceptible they are to changes in market interest rates and bond yields. As interest rates increase, those securities purchased at a lower yield show a mark-to-market unrealized loss. The unrealized losses are due primarily to changes in credit spreads and interest rates. We expect to realize the full value of all these investments upon maturity or sale. The weighted average remaining duration of these securities was approximately 10 and 11 months as of September 30, 2015 and December 31, 2014, respectively.

As the carrying value approximates the fair value for our short-term and long-term marketable securities shown in the tables above, the following table summarizes the fair value of our short-term and long-term marketable securities classified by maturity as of September 30, 2015 and December 31, 2014 (in thousands):



	September 30, 2015		December 31, 2014
Due in one year or less	$	310,715	$	254,787
Due in greater than one year	145,246		147,892
Total available for sale short-term and long-term marketable securities	$	455,961	$	402,679

Fair Value Measurements

We measure the fair value of our cash equivalents and marketable securities as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. We use the GAAP fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. This hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The three levels of inputs that may be used to measure fair value:

Level 1 — Quoted (unadjusted) prices in active markets for identical assets or liabilities.

Our Level 1 assets consist of money market funds and U.S. government treasury bonds.

Level 2 — Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability.

Our Level 2 assets consist of commercial paper, corporate bonds, certificates of deposits, U.S. government agency bonds, asset-backed securities, municipal securities, U.S. dollar dominated foreign corporate bonds and our Israeli funds that are mainly invested in insurance policies and foreign currency forward contracts. We obtain fair values for Level 2 investments from our asset manager for each of our portfolios. Our custody bank and asset managers independently use professional pricing services to gather pricing data which may include quoted market prices for identical or comparable financial instruments, or inputs other than quoted prices that are observable either directly or indirectly, and we are ultimately responsible for these underlying estimates. The foreign currency forward contracts are valued using observable inputs such as quotations on forward foreign exchange rates.

Level 3 — Unobservable inputs to the valuation methodology that are supported by little or no market activity and that are significant to the measurement of the fair value of the assets or liabilities. Level 3 assets and liabilities include those whose fair value measurements are determined using pricing models, discounted cash flow methodologies or similar valuation techniques, as well as significant management judgment or estimation.

Recurring Fair Value Measurements

The following tables summarize our financial assets measured at fair value on a recurring basis as of September 30, 2015 and December 31, 2014 (in thousands):



Description	Balance as of September 30, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Cash equivalents:
Money market funds	$	71,090	$	71,090	$	—
Commercial paper	48,711		—		48,711
Corporate bonds	400		—		400
Short-term investments:
Commercial paper	35,938		—		35,938
Corporate bonds	176,862		—		176,862
Municipal securities	11,698		—		11,698
U.S. government agency bonds	58,039		—		58,039
U.S. government treasury bonds	27,666		27,666		—
U.S. dollar dominated foreign corporate bonds	512		—		512
Long-term investments:
U.S. government agency bonds	37,776		—		37,776
Corporate bonds	54,715		—		54,715
U.S. dollar dominated foreign corporate bonds	—		—		—
U.S. government treasury bonds	38,825		38,825		—
Municipal securities	7,389		—		7,389
Asset-backed securities	6,541		—		6,541
Prepaid expenses and other current assets:
Israeli funds	2,338		—		2,338
	$	578,500	$	137,581	$	440,919



Description	Balance as of December 31, 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Cash equivalents:
Money market funds	$	80,786	$	80,786	$	—
Commercial paper	21,997		—		21,997
Corporate bonds	1,745		—		1,745
Short-term investments:
Commercial paper	33,998		—		33,998
Corporate bonds	151,966		—		151,966
U.S. dollar denominated foreign corporate bonds	901		—		901
Municipal securities	9,160		—		9,160
U.S. government agency bonds	41,587		—		41,587
U.S. government treasury bonds	15,777		15,777		—
Certificates of Deposits	1,398		—		1,398
Long-term investments:
U.S. government agency bonds	48,217		—		48,217
Corporate bonds	57,089		—		57,089
U.S. dollar denominated foreign corporate bonds	521		—		521
U.S. government treasury bonds	20,813		20,813		—
Municipal securities	9,551		—		9,551
Asset-backed securities	11,701		—		11,701
Prepaid expenses and other current assets:
Israeli funds	2,307		—		2,307
	$	509,514	$	117,376	$	392,138

Derivative Financial Instruments

In September 2015, we began entering into foreign currency forward contracts to minimize the short-term impact of foreign currency exchange rate fluctuations on cash and certain trade and intercompany receivables and payables. These instruments are classified within level 2 of the fair value hierarchy and are included in prepaid expenses and other current assets. The net loss on these forward contracts was immaterial for the three and nine months ended September 30, 2015. As of September 30, 2015, the fair value of foreign exchange forward contracts outstanding was a loss of $0.1 million.

The following table presents the gross notional value of all our foreign exchange forward contracts outstanding as of September 30, 2015 (in thousands):



	As of September 30, 2015
	Local Currency Amount		Notional Contract Amount (USD)
US dollar	$	31,600	$	31,600
Euro	€14,600		16,428
Japanese yen	¥1,680,000		14,018
Australian dollar	A$5,200		3,657
Hong Kong dollar	HK$	27,000	3,494
Singapore dollar	S$2,600		1,817
			$	71,014

Balance Sheet Components

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Balance Sheet Components

Inventories

Inventories consist of the following (in thousands):



	September 30, 2015		December 31, 2014
Raw materials	$	9,690	$	8,143
Work in process	6,659		2,970
Finished goods	2,590		4,815
Total Inventories	$	18,939	$	15,928

Work in process includes costs to produce our clear aligner and intra-oral products. The increase in work in process from December 30, 2014 to September 30, 2015 is due to the production ramp up of iTero Element scanners, which began shipping late in the third quarter of 2015. Finished goods primarily represent our intra-oral scanners and ancillary products that support our clear aligner products.

Accrued liabilities

Accrued liabilities consist of the following (in thousands):



	September 30, 2015		December 31, 2014
Accrued payroll and benefits	$	48,150	$	44,610
Accrued sales rebates	7,172		11,110
Accrued sales and marketing expenses	6,006		5,979
Accrued accounts payable	8,582		5,736
Accrued sales tax and value added tax	5,650		5,456
Accrued professional fees	3,841		2,494
Accrued warranty	2,711		3,148
Accrued income taxes	2,400		2,027
Other accrued liabilities	11,402		7,320
Total Accrued Liabilities	$	95,914	$	87,880

Warranty

We regularly review the accrued warranty balances and update these balances based on historical warranty trends. Actual warranty costs incurred have not materially differed from those accrued; however, future actual warranty costs could differ from the estimated amounts.

Clear Aligner

We warrant our Invisalign products against material defects until the Invisalign case is complete. We accrue for warranty costs in cost of net revenues upon shipment of products. The amount of accrued estimated warranty costs is primarily based on historical experience as to product failures as well as current information on replacement costs.

Scanners

We warrant our scanners for a period of one year from the date of training and installation. We accrue for these warranty costs which includes materials and labor based on estimated historical repair costs. Extended service packages may be purchased for additional fees.

Warranty accrual as of September 30, 2015 and 2014 consists of the following activity (in thousands):



	Nine Months Ended September 30,
	2015			2014
Balance at beginning of period	$	3,148		$	3,104
Charged to cost of net revenues	1,308			1,529
Actual warranty expenditures	(1,745		)	(1,370		)
Balance at end of period	$	2,711		$	3,263

Goodwill and Long-lived Assets

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Goodwill and Long-lived Assets

Goodwill

On April 29, 2011, we acquired Cadent Holdings, Inc. (“Cadent”). In connection with the acquisition, we allocated approximately $58.0 million of goodwill to our Clear Aligner reporting unit based on the expected relative synergies generated by the acquisition. On April 30, 2013, we acquired ICA Holdings Pty Limited in a purchase business combination of which $3.6 million was recorded to goodwill, which was attributed to our Clear Aligner reporting unit.

The change in the carrying value of goodwill for the nine months ended September 30, 2015, all attributable to our Clear Aligner reporting unit, is as follows (in thousands):



	Clear Aligner
Balance as of December 31, 2014	$	61,369
Adjustments ¹	(391		)
Balance as of September 30, 2015	$	60,978

¹The adjustments to goodwill during the nine months ended September 30, 2015 were due to foreign currency translation.

During the fourth quarter of fiscal 2014, we performed the annual goodwill impairment testing and found no impairment events as the fair value of our Clear Aligner reporting unit was significantly in excess of the carrying value.

Acquired intangible assets, arising either as a direct result from the Cadent acquisition or individually acquired, are being amortized as follows (in thousands):



	Weighted Average Amortization Period (in years)	Gross Carrying Amount as of September 30, 2015		Accumulated Amortization			Accumulated Impairment Loss			Net Carrying Value as of September 30, 2015
Trademarks	15	$	7,100	$	(1,457	)	$	(4,179	)	$	1,464
Existing technology	13	12,600		(3,437		)	(4,328		)	4,835
Customer relationships	11	33,500		(10,492		)	(10,751		)	12,257
Other	8	285		(104		)	—			181
Total Intangible Assets		$	53,485	$	(15,490	)	$	(19,258	)	$	18,737



	Weighted Average Amortization Period (in years)	Gross Carrying Amount as of December 31, 2014		Accumulated Amortization			Accumulated Impairment Loss			Net Carrying Value as of December 31, 2014
Trademarks	15	$	7,100	$	(1,354	)	$	(4,179	)	$	1,567
Existing technology	13	12,600		(3,015		)	(4,328		)	5,257
Customer relationships	11	33,500		(9,095		)	(10,751		)	13,654
Other	8	285		(76		)	—			209
Total Intangible Assets		$	53,485	$	(13,540	)	$	(19,258	)	$	20,687

The total estimated annual future amortization expense for these acquired intangible assets as of September 30, 2015 is as follows (in thousands):



Fiscal Year Ending December 31,
Remainder of 2015	$	650
2016	2,600
2017	2,600
2018	2,600
2019	2,592
Thereafter	7,695
Total	$	18,737

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References+ Details

Credit Facilities	9 Months Ended
Credit Facilities	Sep. 30, 2015
Notes To Financial Statements [Abstract]
Credit Facilities	Credit Facilities On March 22, 2013, we entered into a credit facility, which provides for a $50.0 million revolving line of credit, with a $10.0 million letter of credit sublimit, and has a maturity date on March 22, 2016. The credit facility also requires us to maintain a minimum unrestricted cash balance of $50.0 million and comply with specific financial conditions and performance requirements. The loan bears interest, at our option, at a fluctuating rate per annum equal to the daily one-month adjusted LIBOR rate plus a spread of 1.75% or an adjusted LIBOR rate (based on one, three, six or twelve-month interest periods) plus a spread of 1.75%. As of September 30, 2015, we had no outstanding borrowings under this credit facility; however, we were not in compliance with certain negative covenants. As a result, on October 15, 2015, we received a waiver for our non-compliance and also amended the credit facility in regards to these negative covenants.

Legal Proceedings (Notes)	9 Months Ended
Legal Proceedings (Notes)	Sep. 30, 2015
Legal Proceedings [Abstract]
Legal Proceedings	Legal Proceedings Securities Class Action Lawsuit On November 28, 2012, plaintiff City of Dearborn Heights Act 345 Police & Fire Retirement System filed a lawsuit against Align, Thomas M. Prescott (“Mr. Prescott”), Align’s former President and Chief Executive Officer, and Kenneth B. Arola (“Mr. Arola”), Align’s former Vice President, Finance and Chief Financial Officer, in the United States District Court for the Northern District of California on behalf of a purported class of purchasers of our common stock (the “Securities Action”). On July 11, 2013, an amended complaint was filed, which named the same defendants, on behalf of a purported class of purchasers of our common stock between January 31, 2012 and October 17, 2012. The amended complaint alleged that Align, Mr. Prescott and Mr. Arola violated Section 10(b) of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder, and that Mr. Prescott and Mr. Arola violated Section 20(a) of the Securities Exchange Act of 1934. Specifically, the amended complaint alleged that during the purported class period defendants failed to take an appropriate goodwill impairment charge related to the April 29, 2011 acquisition of Cadent Holdings, Inc. in the fourth quarter of 2011, the first quarter of 2012 or the second quarter of 2012, which rendered our financial statements and projections of future earnings materially false and misleading and in violation of U.S. GAAP. The amended complaint sought monetary damages in an unspecified amount, costs and attorneys’ fees. On December 9, 2013, the court granted defendants’ motion to dismiss with leave for plaintiff to file a second amended complaint. Plaintiff filed a second amended complaint on January 8, 2014 on behalf of the same purported class. The second amended complaint states the same claims as the amended complaint. On August 22, 2014, the court granted our motion to dismiss without leave to amend. On September 22, 2014, Plaintiff filed a notice of appeal to the Ninth Circuit Court of Appeals. Align intends to vigorously defend itself against these allegations. Align is currently unable to predict the outcome of this amended complaint and therefore cannot determine the likelihood of loss nor estimate a range of possible loss, if any. Shareholder Derivative Lawsuit On February 1, 2013, plaintiff Gary Udis filed a shareholder derivative lawsuit against several of Align’s current and former officers and directors in the Superior Court of California, County of Santa Clara. The complaint alleges that our reported income and earnings were materially overstated because of a failure to timely write down goodwill related to the April 29, 2011 acquisition of Cadent Holdings, Inc., and that defendants made allegedly false statements concerning our forecasts. The complaint asserts various state law causes of action, including claims of breach of fiduciary duty, unjust enrichment, and insider trading, among others. The complaint seeks unspecified damages on behalf of Align, which is named solely as nominal defendant against whom no recovery is sought. The complaint also seeks an order directing Align to reform and improve its corporate governance and internal procedures, and seeks restitution in an unspecified amount, costs, and attorneys’ fees. On July 8, 2013, an Order was entered staying this derivative lawsuit until an initial ruling on our first motion to dismiss the Securities Action. On January 15, 2014, an Order was entered staying this derivative lawsuit until an initial ruling on our second motion to dismiss the Securities Action. On October 14, 2014, an Order was entered staying this derivative lawsuit until a ruling by the Ninth Circuit in the Securities Action discussed above. Align is currently unable to predict the outcome of this complaint and therefore cannot determine the likelihood of loss nor estimate a range of possible losses. In addition, in the course of Align's operations, Align is involved in a variety of claims, suits, investigations, and proceedings, including actions with respect to intellectual property claims, patent infringement claims, government investigations, labor and employment claims, breach of contract claims, tax, and other matters. Regardless of the outcome, these proceedings can have an adverse impact on us because of defense costs, diversion of management resources, and other factors. Although the results of complex legal proceedings are difficult to predict and Align's view of these matters may change in the future as litigation and events related thereto unfold; Align currently does not believe that these matters, individually or in the aggregate, will materially affect Align's financial position, results of operations or cash flows.

Commitments and Contingencies

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Commitments and Contingencies

Operating Leases

As of September 30, 2015, minimum future lease payments for non-cancelable operating leases are as follows (in thousands):



Fiscal Year Ending December 31,	Operating leases
Remainder of 2015	$	2,594
2016	9,982
2017	5,952
2018	2,409
2019	529
Thereafter	438
Total minimum future lease payments	$	21,904

Off-balance Sheet Arrangements

As of September 30, 2015, we had no off-balance sheet arrangements that have, or are reasonably likely to have, a current or future material effect on our consolidated financial condition, results of operations, liquidity, capital expenditures or capital resources.

Indemnification Provisions

In the normal course of business to facilitate transactions in our services and products, we indemnify certain parties: customers, vendors, lessors and other parties with respect to certain matters, including, but not limited to, services to be provided by us and intellectual property infringement claims made by third parties. In addition, we have entered into indemnification agreements with our directors and our executive officers that will require us, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors or officers. Several of these agreements limit the time within which an indemnification claim can be made and the amount of the claim.

It is not possible to make a reasonable estimate of the maximum potential amount under these indemnification agreements due to the unique facts and circumstances involved in each particular agreement. Additionally, we have a limited history of prior indemnification claims and the payments we have made under such agreements have not had a material adverse effect on our results of operations, cash flows or financial position. However, to the extent that valid indemnification claims arise in the future, future payments by us could be significant and could have a material adverse effect on our results of operations or cash flows in a particular period. As of September 30, 2015, we did not have any material indemnification claims that were probable or reasonably possible.

- Definition

The entire disclosure for commitments and contingencies.

+ References+ Details

Stock-based Compensation

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Stock-based Compensation

Summary of stock-based compensation expense

As of September 30, 2015, the 2005 Incentive Plan (as amended) has a total reserve of 23,283,379 shares of which 5,371,675 shares are available for issuance.

Stock-based compensation is based on the estimated fair value of awards, net of estimated forfeitures, and recognized over the requisite service period. Estimated forfeitures are based on historical experience at the time of grant and may be revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The stock-based compensation related to all of our stock-based awards and employee stock purchases for the three and nine months ended September 30, 2015 and 2014 is as follows (in thousands):



	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Cost of net revenues	$	984	$	867	$	2,929	$	2,648
Selling, general and administrative	11,564		7,381		30,106		21,748
Research and development	2,113		1,662		6,100		4,952
Total stock-based compensation	$	14,661	$	9,910	$	39,135	$	29,348

Options

Activity for the nine months ended September 30, 2015 under the stock option plans is set forth below (in thousands, except years and per share amounts):



	Stock Options Number of Shares Underlying Stock Options		Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
					(in years )
Outstanding as of December 31, 2014	668		$	15.57
Granted	—		—
Exercised	(129	)	16.47
Cancelled or expired	—		—
Outstanding as of September 30, 2015	539		$	15.36	2.28	$	22,300
Vested and expected to vest at September 30, 2015	539		$	15.36	2.28	$	22,300
Exercisable at September 30, 2015	539		$	15.36	2.28	$	22,300

There were no stock options granted during the nine months ended September 30, 2015 and 2014. All compensation costs relating to stock options have been recognized as of September 30, 2015.

Restricted Stock Units (“RSU”)

A summary of the RSU activity for the nine months ended September 30, 2015 is as follows (in thousands, except years):



	Number of Shares Underlying RSU		Weighted Average Grant Date Fair Value		Weighted Remaining Contractual Period	Aggregate Intrinsic Value
					(in years)
Nonvested as of December 31, 2014	2,124		$	42.08
Granted	835		57.72
Vested and released	(661	)	36.77
Forfeited	(80	)	47.48
Nonvested as of September 30, 2015	2,218		$	49.39	1.34	$	125,883

As of September 30, 2015, the total unamortized compensation cost related to RSU, net of estimated forfeitures, was $75.0 million, which we expect to recognize over a weighted average period of 2.3 years.

We have granted market-performance based restricted stock units (“MSU”) to our executive officers. Each MSU represents the right to one share of Align’s common stock and will be issued through our amended 2005 Incentive Plan. The actual number of MSU which will be eligible to vest will be based on the performance of Align’s stock price relative to the performance of the NASDAQ Composite Index over the vesting period, generally two to three years, up to 150% of the MSU initially granted.

The following table summarizes the MSU activity for the nine months ended September 30, 2015 (in thousands, except years):



	Number of Shares Underlying MSU		Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Period	Aggregate Intrinsic Value
					(in years )
Nonvested as of December 31, 2014	498		$	42.00
Granted	289		61.73
Vested and released	(162	)	30.28
Forfeited	(14	)	53.69
Nonvested as of September 30, 2015	611		$	51.41	1.55	$	34,689

As of September 30, 2015, the total unamortized compensation costs related to the MSU, net of estimated forfeitures, was $16.2 million, which we expect to recognize over a weighted average period of 1.6 years.

Employee Stock Purchase Plan ("ESPP")

In May 2010, our stockholders approved the 2010 Employee Stock Purchase Plan ("2010 Purchase Plan") which will continue until terminated by either the Board of Directors or its administrator. The maximum number of shares available for purchase under the 2010 Purchase Plan is 2,400,000 shares. As of September 30, 2015, there remains 1,133,749 shares available for purchase under the 2010 Purchase Plan.

The fair value of the option component of the 2010 Purchase Plan shares was estimated at the grant date using the Black-Scholes option pricing model with the following weighted average assumptions:



	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Expected term (in years)	1.2			1.3			1.2			1.2
Expected volatility	27.9		%	35.8		%	31.1		%	38.8		%
Risk-free interest rate	0.41		%	0.24		%	0.29		%	0.20		%
Expected dividends	—			—			—			—
Weighted average fair value at grant date	$	17.10		$	16.44		$	16.19		$	17.15

As of September 30, 2015, the total unamortized compensation cost related to employee purchases was $2.8 million, which we expect to recognize over a weighted average period of 0.8 year.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References+ Details

Common Stock Repurchase Program	9 Months Ended
Common Stock Repurchase Program	Sep. 30, 2015
Notes To Financial Statements [Abstract]
Common Stock Repurchase	Common Stock Repurchase On April 23, 2014, we announced that our Board of Directors had authorized a stock repurchase program pursuant to which we may purchase up to $300.0 million of our common stock over the next three years, with $100.0 million authorized over the first 12 months. Any purchases under this stock repurchase program may be made, from time-to-time, pursuant to open market purchases (including pursuant to Rule 10b5-1 plans), privately-negotiated transactions, accelerated stock repurchases, block trades or derivative contracts or otherwise in accordance with applicable federal securities laws, including Rule 10b-18 of the Securities Exchange Act of 1934. As part of our $300.0 million stock repurchase program, on April 28, 2014, we entered into an accelerated share repurchase agreement ("2014 ASR") to repurchase $70.0 million of our common stock which was completed in July 2014. We received a total of approximately 1.4 million shares under the 2014 ASR for an average purchase price per share of $51.46, which all shares were retired. The final number of shares repurchased was based on our volume-weighted average stock price during the term of the transaction, less an agreed upon discount. During 2014, we repurchased on the open market approximately 0.6 million shares of our common stock at an average price of $50.93 per share, including commissions, for an aggregate purchase price of approximately $28.2 million. In the first quarter of 2015, we repurchased on the open market approximately 0.03 million shares of our common stock at an average price of $57.49 per share, including commission for an aggregate purchase price of approximately $1.8 million. All repurchased shares were retired. In January 2015, our Board of Directors authorized the repurchase of the next $100.0 million under the repurchase program which we anticipate completing within twelve months. On April 28, 2015, we entered into an accelerated share purchase agreement ("2015 ASR") to repurchase $70.0 million of our common stock. Under the terms of the 2015 ASR, we paid $70.0 million on April 29, 2015 and received an initial delivery of approximately 0.8 million shares. The 2015 ASR was completed on July 23, 2015 with a final delivery of approximately 0.3 million shares. We received a total of approximately 1.2 million shares under the 2015 ASR for an average share price of $60.52, which all shares were retired. The final number of shares repurchased was based on our volume-weighted average stock price during the term of the transaction, less an agreed upon discount. During the three months ended September 30, 2015, we repurchased on the open market approximately 0.3 million shares of our common stock at an average price of $57.04 per share, including commissions, for an aggregate purchase price of approximately $18.8 million. All repurchased shares were retired. As of September 30, 2015, we have $111.2 million remaining under the April 2014 stock repurchase program, $11.2 million of which we expect to purchase within the next six months.

Accounting for Income Taxes

9 Months Ended

Sep. 30, 2015

Accounting for Income Taxes

Our provision for income taxes was $8.9 million and $11.3 million for the three months ended September 30, 2015 and 2014, respectively. This represents effective tax rates of 24.3% and 22.8%, respectively. Our effective tax rates differ from the statutory federal income tax rate of 35% due to certain foreign earnings, primarily from Costa Rica, which are subject to a lower tax rate, state income tax expense, the tax impact of certain stock-based compensation charges and unrecognized tax benefits. The increase in the effective rate for the three months ended September 30, 2015 compared to the three months ended September 30, 2014 reflects a jurisdictional shift in forecasted earnings from lower tax non-U.S. jurisdictions to the U.S.

Our provision for income taxes was $31.3 million and $34.3 million for the nine months ended September 30, 2015 and 2014, respectively. This represents effective tax rates of 24.8% and 24.4%, respectively. The increase in the effective rate for the nine months ended September 30, 2015 compared to the nine months ended September 30, 2014 reflects a jurisdictional shift in forecasted earnings from lower tax non-U.S. jurisdictions to the U.S., offset by a negative impact in prior year from a $1.8 million adjustment which related to prior periods.

We exercise significant judgment in regards to estimates of future market growth, forecasted earnings and projected taxable income in determining the provision for income taxes, and for purposes of assessing our ability to utilize any future benefit from deferred tax assets.

As of September 30, 2015, we maintained a valuation allowance of $32.8 million against deferred tax assets primarily related to Israel and California operating loss carryforwards and Australia capital loss carryforwards. These net operating and capital loss carryforwards would result in an income tax benefit if we were to conclude it is more likely than not that the related deferred tax assets will be realized.

Our total gross unrecognized tax benefits was $37.8 million and $33.1 million as of September 30, 2015 and December 31, 2014, respectively, all of which would impact our effective tax rate if recognized. We have elected to recognize interest and penalties related to unrecognized tax benefits as a component of income taxes. The change in accrued interest and penalties during the three and nine months ended September 30, 2015 was not material. We do not expect any significant changes to the amount of unrecognized tax benefit within the next twelve months.

We file U.S. federal, U.S. state, and non-U.S. income tax returns. Our major tax jurisdictions are U.S. federal and the State of California. For U.S. federal and state tax returns, we are no longer subject to tax examinations for years before 2000. With few exceptions, we are no longer subject to examination by foreign tax authorities for years before 2007. We are currently under audit by the California Franchise Tax Board for fiscal year 2011, 2012 and 2013.

In June 2009, the Costa Rica Ministry of Foreign Trade, an agency of the Government of Costa Rica, granted a twelve year extension of certain income tax incentives, which were previously granted in 2002. The incentive tax rates will expire in various years beginning in 2017. Under these incentives, all of the income in Costa Rica during these twelve year incentive periods is subject to reduced rate of Costa Rica income tax. In order to receive the benefit of these incentives, we must hire specified numbers of employees and maintain certain minimum levels of fixed asset investment in Costa Rica. If we do not fulfill these conditions for any reason, our incentive could lapse, and our income in Costa Rica would be subject to taxation at higher rates, which could have a negative impact on our operating results. The Costa Rica corporate income tax rate that would apply, absent the incentives, is 30% for 2015 and 2014. Income taxes were reduced by $8.2 million and $7.7 million for the three months ended September 30, 2015 and 2014, respectively, representing a benefit to diluted net income per share of $0.10 and $0.09 in 2015 and 2014, respectively. As a result of these incentives, our income taxes were reduced by $24.6 million and $22.8 million for the nine months ended September 30, 2015 and 2014, respectively, representing a benefit to diluted net income per share of $0.30 and $0.28 in 2015 and 2014, respectively.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References+ Details

Net Profit Per Share

9 Months Ended

Sep. 30, 2015

Net Profit Per Share

Net Income Per Share

Basic net income per share is computed using the weighted average number of shares of common stock outstanding during the period. Diluted net income per share is computed using the weighted average number of shares of common stock, adjusted for any dilutive effect of potential common stock. Potential common stock, computed using the treasury stock method, includes RSU, MSU, stock options and ESPP.

The following table sets forth the computation of basic and diluted net income per share attributable to common stock (in thousands, except per share amounts):



	Three Months Ended, September 30,				Nine Months Ended, September 30,
	2015		2014		2015		2014
Numerator:
Net income	$	27,616	$	38,247	$	95,143	$	106,291
Denominator:
Weighted-average common shares outstanding, basic	79,808		80,629		80,173		80,924
Dilutive effect of potential common stock	1,284		1,385		1,403		1,519
Total shares, diluted	81,092		82,014		81,576		82,443

Net income per share, basic	$	0.35	$	0.47	$	1.19	$	1.31
Net income per share, diluted	$	0.34	$	0.47	$	1.17	$	1.29

For the three and nine months ended September 30, 2015 and 2014, the anti-dilutive effect from RSU, MSU and ESPP was not material.

- Definition

The entire disclosure for earnings per share.

+ References+ Details

Segments and Geographical Information

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Segments and Geographical Information

Segment Information

Operating segments are defined as components of an enterprise for which separate financial information is available that is evaluated regularly by the Chief Operating Decision Maker (“CODM”), or decision-making group, in deciding how to allocate resources and in assessing performance. Our CODM is our Chief Executive Officer. We report segment information based on the management approach. The management approach designates the internal reporting used by CODM for decision making and performance assessment as the basis for determining our reportable segments. The performance measures of our reportable segments include net revenues and gross profit.

We have grouped our operations into two reportable segments which are also our reporting units: Clear Aligner segment and Scanner and Services segment.


•	Our Clear Aligner segment consists of our Invisalign system which includes Invisalign Full, Express/Lite, Teen, Assist, Vivera retainers, along with our training and ancillary products for treating malocclusion.


•	Our Scanner and Services ("Scanner") segment consists of intra-oral scanning systems and additional services available with the intra-oral scanners that provide digital alternatives to the traditional cast models. This segment includes our iTero scanner and OrthoCAD services.

These reportable operating segments are based on how our CODM views and evaluates our operations as well as allocation of resources. The following information relates to these segments (in thousands):



	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
Net Revenues	2015		2014		2015		2014
Clear Aligner	$	198,292	$	178,138	$	586,138	$	526,112
Scanner	9,344		11,738		29,072		36,941
Total net revenues	$	207,636	$	189,876	$	615,210	$	563,053

Gross profit
Clear Aligner	$	156,205	$	141,117	$	461,502	$	415,903
Scanner	1,371		3,937		5,798		11,878
Total gross profit	$	157,576	$	145,054	$	467,300	$	427,781

Geographical Information

Net revenues are presented below by geographic area (in thousands):



	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2015		2014		2015		2014
Net revenues: ⁽¹⁾
U.S.	$	143,933	$	134,244	$	429,005	$	396,837
the Netherlands	37,427		34,538		118,295		113,828
Other international	26,276		21,094		67,910		52,388
Total net revenues	$	207,636	$	189,876	$	615,210	$	563,053

⁽¹⁾Net revenues are attributed to countries based on location of where revenue is recognized.

Tangible long-lived assets are presented below by geographic area (in thousands):



	September 30, 2015		December 31, 2014
Long-lived assets:⁽²⁾
United States	$	97,789	$	76,511
Mexico	14,655		6,229
Other International	8,294		7,385
Total long-lived assets	$	120,738	$	90,125

⁽²⁾Long-lived assets are attributed to countries based on entity that owns the asset.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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+ Details

Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2015
Notes To Financial Statements [Abstract]
Basis of presentation	Basis of presentation The accompanying unaudited Condensed Consolidated Financial Statements have been prepared by Align Technology, Inc. (“we”, “our”, or “Align”) in accordance with the rules and regulations of the Securities and Exchange Commission ("SEC") and contain all adjustments, including normal recurring adjustments, necessary to present fairly our results of operations for the three and nine months ended September 30, 2015 and 2014, our comprehensive income for the three and nine months ended September 30, 2015 and 2014, our financial position as of September 30, 2015 and our cash flows for the nine months ended September 30, 2015 and 2014. The Condensed Consolidated Balance Sheet as of December 31, 2014 was derived from the December 31, 2014 audited financial statements. Net revenues by geographic area for prior period amounts in Note 12 have been reclassified to conform with the current period presentation. These reclassifications had no impact on our financial position for the three and nine months ended September 30, 2015 and 2014. The results of operations for the three and nine months ended September 30, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015 or any other future period, and we make no representations related thereto. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” “Quantitative and Qualitative Disclosures About Market Risk” and the Consolidated Financial Statements and notes thereto included in Items 7, 7A and 8, respectively, in our Annual Report on Form 10-K for the year ended December 31, 2014.
Use of estimates	Use of estimates The preparation of financial statements in conformity with generally accepted accounting principles ("GAAP") in the United States of America (“U.S.”) requires our management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. On an ongoing basis, we evaluate our estimates, including those related to the fair values of financial instruments, long-lived assets and goodwill, useful lives of intangible assets and property and equipment, revenue recognition, stock-based compensation, income taxes, and contingent liabilities, among others. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-09, “Revenue from Contracts with Customers,” requiring an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The updated standard will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective and permits the use of either the retrospective or cumulative effect transition method. In July 2015, the FASB voted to defer the effective date for annual reporting periods beginning after December, 15, 2017 (including interim reporting periods within those periods) and permitted early adoption of the standard, but not before the original effective date of December 15, 2016. We expect the updated standard to become effective for us in the first quarter of fiscal 2018. We have not yet selected a transition method and we are currently evaluating the effect that the updated standard will have on our consolidated financial statements and related disclosures. In April 2015, the FASB issued ASU No. 2015-05, "Customer's Accounting for Fees Paid in a Cloud Computing Arrangement." providing guidance to entities about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, the entity should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the entity should account for the arrangement as a service contract. The new guidance does not change the accounting for an entity's accounting for service contracts. The updated standard becomes effective for interim and annual reporting periods beginning after December 15, 2015. We are currently evaluating the effect that the updated standard will have on our consolidated financial statements and related disclosures.

Marketable Securities and Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Short-Term And Long-Term Marketable Securities

As of September 30, 2015 and December 31, 2014, the estimated fair value of our short-term and long-term marketable securities, classified as available for sale, are as follows (in thousands):

Short-term



September 30, 2015	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Commercial paper	$	35,938	$	—	$	—		$	35,938
Corporate bonds	176,901		45		(84		)	176,862
Municipal securities	11,694		4		—			11,698
U.S. government agency bonds	58,003		36		—			58,039
U.S. government treasury bonds	27,649		17		—			27,666
U.S. dollar dominated foreign corporate bonds	513		—		(1		)	512
Total Marketable Securities, Short-Term	$	310,698	$	102	$	(85	)	$	310,715

Long-term



September 30, 2015	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. government agency bonds	$	37,733	$	43	$	—		$	37,776
Corporate bonds	54,808		28		(121		)	54,715
U.S. dollar dominated foreign corporate bonds	—		—		—			—
U.S. government treasury bonds	38,741		84		—			38,825
Municipal securities	7,372		17		—			7,389
Asset-backed securities	6,544		—		(3		)	6,541
Total Marketable Securities, Long-Term	$	145,198	$	172	$	(124	)	$	145,246

Short-term



December 31, 2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Commercial paper	$	33,998	$	—	$	—		$	33,998
Corporate bonds	152,055		27		(116		)	151,966
U.S. dollar dominated foreign corporate bonds	901		—		—			901
Municipal securities	9,147		13		—			9,160
U.S. government agency bonds	41,574		14		(1		)	41,587
U.S. government treasury bonds	15,770		7		—			15,777
Certificates of Deposits	1,398		—		—			1,398
Total Marketable Securities, Short-Term	$	254,843	$	61	$	(117	)	$	254,787

Long-term



December 31, 2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. government agency bonds	$	48,233	$	12	$	(28	)	$	48,217
Corporate bonds	57,195		6		(112		)	57,089
U.S. dollar dominated foreign corporate bonds	523		—		(2		)	521
U.S. government treasury bonds	20,814		5		(6		)	20,813
Municipal securities	9,552		5		(6		)	9,551
Asset-backed securities	11,713		—		(12		)	11,701
Total Marketable Securities, Long-Term	$	148,030	$	28	$	(166	)	$	147,892

Investments Classified by Contractual Maturity Date [Table Text Block]



	September 30, 2015		December 31, 2014
Due in one year or less	$	310,715	$	254,787
Due in greater than one year	145,246		147,892
Total available for sale short-term and long-term marketable securities	$	455,961	$	402,679

Financial Assets Measured At Fair Value On Recurring Basis

The following tables summarize our financial assets measured at fair value on a recurring basis as of September 30, 2015 and December 31, 2014 (in thousands):



Description	Balance as of September 30, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Cash equivalents:
Money market funds	$	71,090	$	71,090	$	—
Commercial paper	48,711		—		48,711
Corporate bonds	400		—		400
Short-term investments:
Commercial paper	35,938		—		35,938
Corporate bonds	176,862		—		176,862
Municipal securities	11,698		—		11,698
U.S. government agency bonds	58,039		—		58,039
U.S. government treasury bonds	27,666		27,666		—
U.S. dollar dominated foreign corporate bonds	512		—		512
Long-term investments:
U.S. government agency bonds	37,776		—		37,776
Corporate bonds	54,715		—		54,715
U.S. dollar dominated foreign corporate bonds	—		—		—
U.S. government treasury bonds	38,825		38,825		—
Municipal securities	7,389		—		7,389
Asset-backed securities	6,541		—		6,541
Prepaid expenses and other current assets:
Israeli funds	2,338		—		2,338
	$	578,500	$	137,581	$	440,919



Description	Balance as of December 31, 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Cash equivalents:
Money market funds	$	80,786	$	80,786	$	—
Commercial paper	21,997		—		21,997
Corporate bonds	1,745		—		1,745
Short-term investments:
Commercial paper	33,998		—		33,998
Corporate bonds	151,966		—		151,966
U.S. dollar denominated foreign corporate bonds	901		—		901
Municipal securities	9,160		—		9,160
U.S. government agency bonds	41,587		—		41,587
U.S. government treasury bonds	15,777		15,777		—
Certificates of Deposits	1,398		—		1,398
Long-term investments:
U.S. government agency bonds	48,217		—		48,217
Corporate bonds	57,089		—		57,089
U.S. dollar denominated foreign corporate bonds	521		—		521
U.S. government treasury bonds	20,813		20,813		—
Municipal securities	9,551		—		9,551
Asset-backed securities	11,701		—		11,701
Prepaid expenses and other current assets:
Israeli funds	2,307		—		2,307
	$	509,514	$	117,376	$	392,138

Schedule of Notional Amounts of Outstanding Derivative Positions

The following table presents the gross notional value of all our foreign exchange forward contracts outstanding as of September 30, 2015 (in thousands):



	As of September 30, 2015
	Local Currency Amount		Notional Contract Amount (USD)
US dollar	$	31,600	$	31,600
Euro	€14,600		16,428
Japanese yen	¥1,680,000		14,018
Australian dollar	A$5,200		3,657
Hong Kong dollar	HK$	27,000	3,494
Singapore dollar	S$2,600		1,817
			$	71,014

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References+ Details

Balance Sheet Components (Tables)

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Schedule of Inventories

Inventories consist of the following (in thousands):



	September 30, 2015		December 31, 2014
Raw materials	$	9,690	$	8,143
Work in process	6,659		2,970
Finished goods	2,590		4,815
Total Inventories	$	18,939	$	15,928

Schedule of Accrued Liabilities

Accrued liabilities consist of the following (in thousands):



	September 30, 2015		December 31, 2014
Accrued payroll and benefits	$	48,150	$	44,610
Accrued sales rebates	7,172		11,110
Accrued sales and marketing expenses	6,006		5,979
Accrued accounts payable	8,582		5,736
Accrued sales tax and value added tax	5,650		5,456
Accrued professional fees	3,841		2,494
Accrued warranty	2,711		3,148
Accrued income taxes	2,400		2,027
Other accrued liabilities	11,402		7,320
Total Accrued Liabilities	$	95,914	$	87,880

Warranty Accrual

Warranty accrual as of September 30, 2015 and 2014 consists of the following activity (in thousands):



	Nine Months Ended September 30,
	2015			2014
Balance at beginning of period	$	3,148		$	3,104
Charged to cost of net revenues	1,308			1,529
Actual warranty expenditures	(1,745		)	(1,370		)
Balance at end of period	$	2,711		$	3,263

Goodwill and Long-lived Assets (Tables)

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Summary of Goodwill by Reportable Segment

The change in the carrying value of goodwill for the nine months ended September 30, 2015, all attributable to our Clear Aligner reporting unit, is as follows (in thousands):



	Clear Aligner
Balance as of December 31, 2014	$	61,369
Adjustments ¹	(391		)
Balance as of September 30, 2015	$	60,978

Schedule Of Amortized Intangible Assets

Acquired intangible assets, arising either as a direct result from the Cadent acquisition or individually acquired, are being amortized as follows (in thousands):



	Weighted Average Amortization Period (in years)	Gross Carrying Amount as of September 30, 2015		Accumulated Amortization			Accumulated Impairment Loss			Net Carrying Value as of September 30, 2015
Trademarks	15	$	7,100	$	(1,457	)	$	(4,179	)	$	1,464
Existing technology	13	12,600		(3,437		)	(4,328		)	4,835
Customer relationships	11	33,500		(10,492		)	(10,751		)	12,257
Other	8	285		(104		)	—			181
Total Intangible Assets		$	53,485	$	(15,490	)	$	(19,258	)	$	18,737



	Weighted Average Amortization Period (in years)	Gross Carrying Amount as of December 31, 2014		Accumulated Amortization			Accumulated Impairment Loss			Net Carrying Value as of December 31, 2014
Trademarks	15	$	7,100	$	(1,354	)	$	(4,179	)	$	1,567
Existing technology	13	12,600		(3,015		)	(4,328		)	5,257
Customer relationships	11	33,500		(9,095		)	(10,751		)	13,654
Other	8	285		(76		)	—			209
Total Intangible Assets		$	53,485	$	(13,540	)	$	(19,258	)	$	20,687

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The total estimated annual future amortization expense for these acquired intangible assets as of September 30, 2015 is as follows (in thousands):



Fiscal Year Ending December 31,
Remainder of 2015	$	650
2016	2,600
2017	2,600
2018	2,600
2019	2,592
Thereafter	7,695
Total	$	18,737

Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Schedule of Future Lease Payments

As of September 30, 2015, minimum future lease payments for non-cancelable operating leases are as follows (in thousands):



Fiscal Year Ending December 31,	Operating leases
Remainder of 2015	$	2,594
2016	9,982
2017	5,952
2018	2,409
2019	529
Thereafter	438
Total minimum future lease payments	$	21,904

Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2015

Stock-based Compensation Expense

The stock-based compensation related to all of our stock-based awards and employee stock purchases for the three and nine months ended September 30, 2015 and 2014 is as follows (in thousands):



	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Cost of net revenues	$	984	$	867	$	2,929	$	2,648
Selling, general and administrative	11,564		7,381		30,106		21,748
Research and development	2,113		1,662		6,100		4,952
Total stock-based compensation	$	14,661	$	9,910	$	39,135	$	29,348

Stock Option Activity

Activity for the nine months ended September 30, 2015 under the stock option plans is set forth below (in thousands, except years and per share amounts):



	Stock Options Number of Shares Underlying Stock Options		Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
					(in years )
Outstanding as of December 31, 2014	668		$	15.57
Granted	—		—
Exercised	(129	)	16.47
Cancelled or expired	—		—
Outstanding as of September 30, 2015	539		$	15.36	2.28	$	22,300
Vested and expected to vest at September 30, 2015	539		$	15.36	2.28	$	22,300
Exercisable at September 30, 2015	539		$	15.36	2.28	$	22,300

^[1]

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions

The fair value of the option component of the 2010 Purchase Plan shares was estimated at the grant date using the Black-Scholes option pricing model with the following weighted average assumptions:



	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Expected term (in years)	1.2			1.3			1.2			1.2
Expected volatility	27.9		%	35.8		%	31.1		%	38.8		%
Risk-free interest rate	0.41		%	0.24		%	0.29		%	0.20		%
Expected dividends	—			—			—			—
Weighted average fair value at grant date	$	17.10		$	16.44		$	16.19		$	17.15

Restricted Stock Units (RSUs)

Summary Of Nonvested Shares

A summary of the RSU activity for the nine months ended September 30, 2015 is as follows (in thousands, except years):



	Number of Shares Underlying RSU		Weighted Average Grant Date Fair Value		Weighted Remaining Contractual Period	Aggregate Intrinsic Value
					(in years)
Nonvested as of December 31, 2014	2,124		$	42.08
Granted	835		57.72
Vested and released	(661	)	36.77
Forfeited	(80	)	47.48
Nonvested as of September 30, 2015	2,218		$	49.39	1.34	$	125,883

Market Performance Based Restricted Stock Units

Summary Of Nonvested Shares

The following table summarizes the MSU activity for the nine months ended September 30, 2015 (in thousands, except years):



	Number of Shares Underlying MSU		Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Period	Aggregate Intrinsic Value
					(in years )
Nonvested as of December 31, 2014	498		$	42.00
Granted	289		61.73
Vested and released	(162	)	30.28
Forfeited	(14	)	53.69
Nonvested as of September 30, 2015	611		$	51.41	1.55	$	34,689

[1]	There were no stock options granted during the nine months ended September 30, 2015 and 2014. All compensation costs relating to stock options have been recognized as of September 30, 2015.

Net Profit Per Share (Tables)

9 Months Ended

Sep. 30, 2015

Schedule Of Earnings Per Share Basic And Diluted

The following table sets forth the computation of basic and diluted net income per share attributable to common stock (in thousands, except per share amounts):



	Three Months Ended, September 30,				Nine Months Ended, September 30,
	2015		2014		2015		2014
Numerator:
Net income	$	27,616	$	38,247	$	95,143	$	106,291
Denominator:
Weighted-average common shares outstanding, basic	79,808		80,629		80,173		80,924
Dilutive effect of potential common stock	1,284		1,385		1,403		1,519
Total shares, diluted	81,092		82,014		81,576		82,443

Net income per share, basic	$	0.35	$	0.47	$	1.19	$	1.31
Net income per share, diluted	$	0.34	$	0.47	$	1.17	$	1.29

Segments and Geographical Information (Tables)

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas



	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
Net Revenues	2015		2014		2015		2014
Clear Aligner	$	198,292	$	178,138	$	586,138	$	526,112
Scanner	9,344		11,738		29,072		36,941
Total net revenues	$	207,636	$	189,876	$	615,210	$	563,053

Gross profit
Clear Aligner	$	156,205	$	141,117	$	461,502	$	415,903
Scanner	1,371		3,937		5,798		11,878
Total gross profit	$	157,576	$	145,054	$	467,300	$	427,781

Geographical Information

Net revenues are presented below by geographic area (in thousands):



	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2015		2014		2015		2014
Net revenues: ⁽¹⁾
U.S.	$	143,933	$	134,244	$	429,005	$	396,837
the Netherlands	37,427		34,538		118,295		113,828
Other international	26,276		21,094		67,910		52,388
Total net revenues	$	207,636	$	189,876	$	615,210	$	563,053

⁽¹⁾Net revenues are attributed to countries based on location of where revenue is recognized.

Tangible long-lived assets are presented below by geographic area (in thousands):



	September 30, 2015		December 31, 2014
Long-lived assets:⁽²⁾
United States	$	97,789	$	76,511
Mexico	14,655		6,229
Other International	8,294		7,385
Total long-lived assets	$	120,738	$	90,125

⁽²⁾Long-lived assets are attributed to countries based on entity that owns the asset.

Short-Term and Long-Term Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Total available for sale short-term and long-term marketable securities	$ 455,961	$ 402,679
Fair Value, Measurements, Recurring [Member] \| Short-term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	310,698	254,843
Gross Unrealized Gains	102	61
Gross Unrealized Losses	(85)	(117)
Total available for sale short-term and long-term marketable securities	310,715	254,787
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| Commercial paper
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	35,938	33,998
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Total available for sale short-term and long-term marketable securities	35,938	33,998
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	176,901	152,055
Gross Unrealized Gains	45	27
Gross Unrealized Losses	(84)	(116)
Total available for sale short-term and long-term marketable securities	176,862	151,966
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| U.S. government agency bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	58,003	41,574
Gross Unrealized Gains	36	14
Gross Unrealized Losses	0	(1)
Total available for sale short-term and long-term marketable securities	58,039	41,587
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| US Treasury Bond Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		15,770
Gross Unrealized Gains		7
Gross Unrealized Losses		0
Total available for sale short-term and long-term marketable securities		15,777
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		1,398
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Total available for sale short-term and long-term marketable securities		1,398
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	11,694	9,147
Gross Unrealized Gains	4	13
Gross Unrealized Losses	0	0
Total available for sale short-term and long-term marketable securities	11,698	9,160
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| U.S. dollar dominated foreign corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	513	901
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1)	0
Total available for sale short-term and long-term marketable securities	512	901
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| U.S. government treasury bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	27,649
Gross Unrealized Gains	17
Gross Unrealized Losses	0
Total available for sale short-term and long-term marketable securities	27,666	15,777
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| Certificates of deposit
Schedule of Available-for-sale Securities [Line Items]
Total available for sale short-term and long-term marketable securities		1,398
Fair Value, Measurements, Recurring [Member] \| Long-term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	145,198	148,030
Gross Unrealized Gains	172	28
Gross Unrealized Losses	(124)	(166)
Total available for sale short-term and long-term marketable securities	145,246	147,892
Fair Value, Measurements, Recurring [Member] \| Long-term Investments \| Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	54,808	57,195
Gross Unrealized Gains	28	6
Gross Unrealized Losses	(121)	(112)
Total available for sale short-term and long-term marketable securities	54,715	57,089
Fair Value, Measurements, Recurring [Member] \| Long-term Investments \| Foreign Government Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Total available for sale short-term and long-term marketable securities	0	521
Fair Value, Measurements, Recurring [Member] \| Long-term Investments \| U.S. government agency bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	37,733	48,233
Gross Unrealized Gains	43	12
Gross Unrealized Losses	0	(28)
Total available for sale short-term and long-term marketable securities	37,776	48,217
Fair Value, Measurements, Recurring [Member] \| Long-term Investments \| Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	6,544	11,713
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(3)	(12)
Total available for sale short-term and long-term marketable securities	6,541	11,701
Fair Value, Measurements, Recurring [Member] \| Long-term Investments \| Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,372	9,552
Gross Unrealized Gains	17	5
Gross Unrealized Losses	0	(6)
Total available for sale short-term and long-term marketable securities	7,389	9,551
Fair Value, Measurements, Recurring [Member] \| Long-term Investments \| U.S. dollar dominated foreign corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		523
Gross Unrealized Gains		0
Gross Unrealized Losses		(2)
Total available for sale short-term and long-term marketable securities	0	521
Fair Value, Measurements, Recurring [Member] \| Long-term Investments \| U.S. government treasury bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	38,741	20,814
Gross Unrealized Gains	84	5
Gross Unrealized Losses	0	(6)
Total available for sale short-term and long-term marketable securities	$ 38,825	$ 20,813

Marketable Securities and Fair Value Measurements Available For Sale Securities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Due in one year or less	$ 310,715	$ 254,787
Due in greater than one year	145,246	147,892
Total available for sale short-term and long-term marketable securities	$ 455,961	$ 402,679

- Definition

Investments in debt and equity securities which are categorized neither as held-to-maturity nor trading and which are intended to be sold or mature more than one year from the balance sheet date or operating cycle, if longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income.

+ References+ Details

Summary of Financial Assets Measured at Fair Value on Recurring Basis (Details) (USD $)	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	$ 455,961,000	$ 402,679,000
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	578,500,000	509,514,000
Fair Value, Measurements, Recurring [Member] \| Israeli Severance Funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	2,338,000	2,307,000
Fair Value, Measurements, Recurring [Member] \| Cash Equivalents \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	400,000
Fair Value, Measurements, Recurring [Member] \| Cash Equivalents \| Money market funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	71,090,000	80,786,000
Fair Value, Measurements, Recurring [Member] \| Cash Equivalents \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	48,711,000	21,997,000
Fair Value, Measurements, Recurring [Member] \| Cash Equivalents \| U.S. dollar dominated foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents		1,745,000
Fair Value, Measurements, Recurring [Member] \| Short-term Investments
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	310,715,000	254,787,000
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	35,938,000	33,998,000
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	176,862,000	151,966,000
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| U.S. dollar dominated foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	512,000	901,000
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| U.S. government agency bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	58,039,000	41,587,000
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| U.S. government treasury bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	27,666,000	15,777,000
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments		1,398,000
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	11,698,000	9,160,000
Fair Value, Measurements, Recurring [Member] \| Short-term Investments \| Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments		1,398,000
Fair Value, Measurements, Recurring [Member] \| Long-term Investments
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	145,246,000	147,892,000
Fair Value, Measurements, Recurring [Member] \| Long-term Investments \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	54,715,000	57,089,000
Fair Value, Measurements, Recurring [Member] \| Long-term Investments \| U.S. dollar dominated foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	521,000
Fair Value, Measurements, Recurring [Member] \| Long-term Investments \| U.S. government agency bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	37,776,000	48,217,000
Fair Value, Measurements, Recurring [Member] \| Long-term Investments \| Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	521,000
Fair Value, Measurements, Recurring [Member] \| Long-term Investments \| U.S. government treasury bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	38,825,000	20,813,000
Fair Value, Measurements, Recurring [Member] \| Long-term Investments \| Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	7,389,000	9,551,000
Fair Value, Measurements, Recurring [Member] \| Long-term Investments \| Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	6,541,000	11,701,000
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	137,581,000	117,376,000
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Israeli Severance Funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	0	0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Cash Equivalents \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Cash Equivalents \| Money market funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	71,090,000	80,786,000
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Cash Equivalents \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	0	0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Cash Equivalents \| U.S. dollar dominated foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents		0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Short-term Investments \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Short-term Investments \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Short-term Investments \| U.S. dollar dominated foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Short-term Investments \| U.S. government agency bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Short-term Investments \| U.S. government treasury bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	27,666,000	15,777,000
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Short-term Investments \| Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments		0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Short-term Investments \| Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Long-term Investments \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Long-term Investments \| U.S. dollar dominated foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Long-term Investments \| U.S. government agency bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Long-term Investments \| Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments		0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Long-term Investments \| U.S. government treasury bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	38,825,000	20,813,000
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Long-term Investments \| Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Long-term Investments \| Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	440,919,000	392,138,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Israeli Severance Funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	2,338,000	2,307,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Cash Equivalents \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	400,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Cash Equivalents \| Money market funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	0	0
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Cash Equivalents \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	48,711,000	21,997,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Cash Equivalents \| U.S. dollar dominated foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents		1,745,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Short-term Investments \| Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	35,938,000	33,998,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Short-term Investments \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	176,862,000	151,966,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Short-term Investments \| U.S. dollar dominated foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	512,000	901,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Short-term Investments \| U.S. government agency bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	58,039,000	41,587,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Short-term Investments \| U.S. government treasury bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Short-term Investments \| Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments		1,398,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Short-term Investments \| Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	11,698,000	9,160,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Long-term Investments \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	54,715,000	57,089,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Long-term Investments \| U.S. dollar dominated foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Long-term Investments \| U.S. government agency bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	37,776,000	48,217,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Long-term Investments \| Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments		521,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Long-term Investments \| U.S. government treasury bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Long-term Investments \| Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	7,389,000	9,551,000
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) \| Long-term Investments \| Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	$ 6,541,000	$ 11,701,000

Marketable Securities and Fair Value Measurements - Derivative Notional Instruments (Details) (Foreign Exchange Forward)	9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2015 Significant Other Observable Inputs (Level 2) Prepaid Expenses and Other Current Assets USD ($)	Sep. 30, 2015 US dollar Significant Other Observable Inputs (Level 2) Prepaid Expenses and Other Current Assets USD ($)	Sep. 30, 2015 Euro Significant Other Observable Inputs (Level 2) Prepaid Expenses and Other Current Assets USD ($)	Sep. 30, 2015 Euro Significant Other Observable Inputs (Level 2) Prepaid Expenses and Other Current Assets EUR (€)	Sep. 30, 2015 Japanese yen Significant Other Observable Inputs (Level 2) Prepaid Expenses and Other Current Assets USD ($)	Sep. 30, 2015 Japanese yen Significant Other Observable Inputs (Level 2) Prepaid Expenses and Other Current Assets JPY (¥)	Sep. 30, 2015 Australian dollar Significant Other Observable Inputs (Level 2) Prepaid Expenses and Other Current Assets USD ($)	Sep. 30, 2015 Australian dollar Significant Other Observable Inputs (Level 2) Prepaid Expenses and Other Current Assets AUD	Sep. 30, 2015 Hong Kong dollar Significant Other Observable Inputs (Level 2) Prepaid Expenses and Other Current Assets USD ($)	Sep. 30, 2015 Hong Kong dollar Significant Other Observable Inputs (Level 2) Prepaid Expenses and Other Current Assets HKD	Sep. 30, 2015 Singapore dollar Significant Other Observable Inputs (Level 2) Prepaid Expenses and Other Current Assets USD ($)	Sep. 30, 2015 Singapore dollar Significant Other Observable Inputs (Level 2) Prepaid Expenses and Other Current Assets SGD
Derivative [Line Items]
Decrease in fair value	$ 100,000
Notional amount		$ 71,014,000	$ 31,600,000	$ 16,428,000	€ 14,600,000	$ 14,018,000	¥ 1,680,000,000	$ 3,657,000	5,200,000	$ 3,494,000	27,000,000	$ 1,817,000	2,600,000

Inventories (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Disclosure Inventories [Abstract]
Raw materials	$ 9,690	$ 8,143
Work in process	6,659	2,970
Finished goods	2,590	4,815
Total Inventories	$ 18,939	$ 15,928

Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Disclosure Accrued Liabilities [Abstract]
Accrued payroll and benefits	$ 48,150	$ 44,610
Accrued sales rebate	7,172	11,110
Accrued sales tax and value added tax	5,650	5,456
Accrued sales and marketing expenses	6,006	5,979
Accrued accounts payable	8,582	5,736
Accrued warranty	2,711	3,148
Accrued professional fees	3,841	2,494
Accrued income taxes	2,400	2,027
Other accrued liabilities	11,402	7,320
Total Accrued Liabilities	$ 95,914	$ 87,880

Warranty Accrual Activity (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 3,148	$ 3,104
Charged to cost of revenues	1,308	1,529
Actual warranty expenditures	(1,745)	(1,370)
Balance at end of period	$ 2,711	$ 3,263

Business Combinations (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill and intangible assets, net	$ 79,715	$ 82,056

Change in Carrying Value of Goodwill (Details) (USD $)
In Thousands, unless otherwise specified

9 Months Ended

Sep. 30, 2015

Dec. 31, 2014

Sep. 30, 2015

Clear Aligner [Member]

Goodwill [Roll Forward]

Balance as of December 31, 2014

$ 79,715

$ 82,056

$ 61,369

Adjustments

(391)

^[1]

Balance as of September 30, 2015

$ 79,715

$ 82,056

$ 60,978

[1]	The adjustments to goodwill during the nine months ended September 30, 2015 were due to foreign currency translation.

Intangible Assets as Direct Result from Cadent Acquisition (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, beginning balance	$ 53,485	$ 53,485
Accumulated Amortization	(15,490)	(13,540)
Accumulated Impairment Loss	(19,258)	(19,258)
Net Carrying Value, ending balance	18,737	20,687
Trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	15 years	15 years
Gross Carrying Amount, beginning balance	7,100	7,100
Accumulated Amortization	(1,457)	(1,354)
Accumulated Impairment Loss	(4,179)	(4,179)
Net Carrying Value, ending balance	1,464	1,567
Existing technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	13 years	13 years
Gross Carrying Amount, beginning balance	12,600	12,600
Accumulated Amortization	(3,437)	(3,015)
Accumulated Impairment Loss	(4,328)	(4,328)
Net Carrying Value, ending balance	4,835	5,257
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	11 years	11 years
Gross Carrying Amount, beginning balance	33,500	33,500
Accumulated Amortization	(10,492)	(9,095)
Accumulated Impairment Loss	(10,751)	(10,751)
Net Carrying Value, ending balance	12,257	13,654
Other
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	8 years	8 years
Gross Carrying Amount, beginning balance	285	285
Accumulated Amortization	(104)	(76)
Accumulated Impairment Loss	0	0
Net Carrying Value, ending balance	$ 181	$ 209

Total Estimated Annual Future Amortization Expense for Acquired Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Disclosure Total Estimated Annual Future Amortization Expense For Acquired Intangible Assets [Abstract]
Remainder of 2015	$ 650
2015	2,600
2016	2,600
2017	2,600
2018	2,592
Thereafter	7,695
Net Carrying Value, ending balance	$ 18,737	$ 20,687

Credit Facilities - Additional Information (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	9 Months Ended
	Mar. 22, 2013	Sep. 30, 2015 Revolving Credit Facility [Member] Wells Fargo [Member]	Mar. 22, 2013 Revolving Credit Facility [Member] Wells Fargo [Member]	Sep. 30, 2015 Letter of Credit [Member] Wells Fargo [Member]	Mar. 22, 2013 Letter of Credit [Member] Wells Fargo [Member]
Line of Credit Facility [Line Items]
Line of credit, available borrowings			$ 50.0		$ 10.0
Unrestricted Cash Deposit		50.0
Debt Instrument, Basis Spread on Variable Rate	1.75%
Line of Credit Facility, Amount Outstanding				$ 0

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References+ Details

Minimum Future Lease Payments for Non-Cancelable Leases (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015
Disclosure Minimum Future Lease Payments For Non Cancelable Leases [Abstract]
Remainder of 2015	$ 2,594
2015	9,982
2016	5,952
2017	2,409
2018	529
Thereafter	438
Total minimum lease payments	$ 21,904

Stock-based Compensation - Additional Information (Details) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2015
Incentive Plan 2005
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance	23,283,379
Number of shares available for issuance	5,371,675
Employee Stock Purchase Plan 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares available	2,400,000
Number of shares remaining	1,133,749
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unamortized compensation cost	$ 75.0
Weighted average period of total unamortized cost (in years)	2 years 3 months
Market Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unamortized compensation cost	16.2
Weighted average period of total unamortized cost (in years)	1 year 7 months 6 days
Market Performance Based Restricted Stock Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of granted market-performance based restricted stock units	2 years
Market Performance Based Restricted Stock Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of granted market-performance based restricted stock units	3 years
Percentage of market-performance based restricted stock units eligible to vest over the vesting period	150.00%
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unamortized compensation cost	$ 2.8
Weighted average period of total unamortized cost (in years)	9 months 18 days

Stock-Based Compensation Expense Related to All Stock-Based Awards and Employee Stock Purchases (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 14,661	$ 9,910	$ 39,135	$ 29,348
Cost of net revenues
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	984	867	2,929	2,648
Selling, general and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	11,564	7,381	30,106	21,748
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 2,113	$ 1,662	$ 6,100	$ 4,952

Activity Under Stock Option Plans (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2015
Number of Shares Underlying Stock Options
Outstanding as of December 31, 2014	668
Granted	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 0
Exercised	(129)
Cancelled or expired	0
Outstanding as of September 30, 2015	539
Vested and expected to vest at September 30, 2015	539
Exercisable at September 30, 2015	539
Weighted Average Exercise Price per Share
Outstanding as of December 31, 2014	$ 15.57
Exercised	$ 16.47
Cancelled or expired	$ 0.00
Outstanding as of September 30, 2015	$ 15.36
Vested and expected to vest at June 30, 2014 (usd per share)	$ 15.36
Exercisable at June 30, 2014 (usd per share)	$ 15.36
Weighted Average Remaining Contractual Term
Outstanding as of September 30, 2015	2 years 3 months 11 days
Vested and expected to vest at September 30, 2015	2 years 3 months 11 days
Exercisable at September 30, 2015	2 years 3 months 11 days
Aggregate Intrinsic Value
Outstanding as of September 30, 2015	$ 22,300
Vested and expected to vest at September 30, 2015	22,300
Exercisable at September 30, 2015	$ 22,300

Summary of Nonvested Shares (Details) (Restricted Stock Units (RSUs), USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2015
Restricted Stock Units (RSUs)
Number of Shares Underlying RSUs
Nonvested as of December 31, 2014	2,124
Granted	835
Vested and released	(661)
Forfeited	(80)
Nonvested as of September 30, 2015	2,218
Weighted Average Grant Date Fair Value
Nonvested as of December 31, 2014	$ 0
Granted	$ 0
Vested and released	$ 0
Forfeited	$ 0
Nonvested as of September 30, 2015	$ 50
Weighted Remaining Vesting Period
Nonvested as of September 30, 2015	1 year 4 months 2 days
Aggregate Intrinsic Value
Nonvested as of September 30, 2015	$ 125,883

Summary of MSU Performance (Details) (Market Performance Based Restricted Stock Units, USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2015
Market Performance Based Restricted Stock Units
Number of Shares Underlying MSUs
Nonvested as of December 31, 2014	498
Granted	289
Vested and released	(162)
Forfeited	(14)
Nonvested as of September 30, 2015	611
Weighted Average Grant Date Fair Value
Nonvested as of December 31, 2014	$ 42,000
Granted	$ 62,000
Vested and released	$ 30,000
Forfeited	$ 54,000
Nonvested as of September 30, 2015	$ 51,410
Weighted Average Remaining Vesting Period
Nonvested as of September 30, 2015	1 year 6 months 18 days
Aggregate Intrinsic Value
Nonvested as of September 30, 2015	$ 34,689

Stock-based Compensation Stock-based Compensation Employee Stock Purchase Plan (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Expected term (in years)	1 year 2 months 12 days	1 year 3 months 18 days	1 year 2 months 12 days	1 year 2 months 12 days
Expected volatility	27.90%	35.80%	31.10%	38.80%
Risk-free interest rate	0.41%	0.20%	0.29%	0.20%
Expected dividends	0.00%	0.00%	0.00%	0.00%
Weighted average fair value at grant date (USD per Share)	$ 17.10	$ 16.44	$ 16.19	$ 17.15

Common Stock Repurchase Program - Additional Information (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended			3 Months Ended		12 Months Ended			0 Months Ended
	Apr. 28, 2015	Apr. 28, 2014	Apr. 23, 2014	Sep. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Apr. 28, 2015	Jan. 31, 2015	Jul. 30, 2015 Accelerated Share Repurchase Program [Member]	Jul. 29, 2015 Accelerated Share Repurchase Program [Member]	Jul. 29, 2014 Accelerated Share Repurchase Program [Member]	Sep. 30, 2015 April 2014 Stock Repurchase Program [Member]
Share Repurchases [Line Items]
Repurchase of common stock, common stock authorized			$ 300.0					$ 100.0
Stock repurchase program, period			3 years
Stock repurchase program, authorized amount for next twelve months			100.0
Accelerated share repurchase, contracted amount of repurchase	70.0	70.0
Payments under accelerated share repurchase agreement							70.0
Treasury Stock, Shares, Acquired	0.8								0	0	1.4
Share Repurchases Price Paid Per Share									$ 60.52		$ 51.46
Stock Repurchased During Period, Shares				0.30	0.03	0.60
Stock Repurchased During Period, Average Price Per Share				$ 57.04	$ 57.49	$ 50.93
Stock Repurchased During Period, Value				18.8	1.8	28.2
Remaining authorized amount												111.2
Repurchases expected in next six months												$ 11.2

Accounting for Income Taxes - Additional Information (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Income Taxes [Line Items]
Provision for income taxes	$ 8,862,000	$ 11,301,000	$ 31,306,000	$ 34,301,000
Effective income tax rate, continuing operations	24.30%	22.80%	24.80%	24.40%
Statutory rate			35.00%
Valuation allowance, deferred tax asset	32,800,000		32,800,000
Unrecognized tax benefits	37,800,000		37,800,000		33,100,000
Tax Holiday effect		7,700,000		22,800,000
Tax holiday effect on diluted earnings per share	$ 0.10	$ 0.09	$ 0.30	$ 0.28
Foreign Tax Authority [Member]
Income Taxes [Line Items]
Foreign income tax rate			30.00%
Tax Holiday effect	8,200,000		24,600,000
Restatement Adjustment [Member]
Income Taxes [Line Items]
Provision for income taxes				$ 1,800,000

Computation of Basic and Diluted Net Profit Per Share Attributable to Common Stock (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Disclosure Computation Of Basic And Diluted Net Profit Per Share Attributable To Common Stock [Abstract]
Net income	$ 27,616	$ 38,247	$ 95,143	$ 106,291
Weighted-average common shares outstanding, basic	79,808	80,629	80,173	80,924
Dilutive effect of potential common stock	1,284	1,385	1,403	1,519
Total shares, diluted	81,092	82,014	81,576	82,443
Net income per share, basic	$ 0.35	$ 0.47	$ 1.19	$ 1.31
Net income per share, diluted	$ 0.34	$ 0.47	$ 1.17	$ 1.29

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.