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Value Assumptions, Expected Term Total current liabilities Liabilities, Current Payroll taxes paid upon the vesting of equity awards Payment, Tax Withholding, Share-based Payment Arrangement Euro Euro Member Countries, Euro Foreign Exchange Forward Foreign Exchange Forward [Member] Line of credit, available borrowings Line of Credit Facility, Maximum Borrowing Capacity Foreign currency translation adjustments Goodwill, Foreign Currency Translation Gain (Loss) Money market funds Money Market Funds [Member] Loss Contingencies [Table] Loss Contingencies [Table] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Fair Value Measurements Financial Instruments Disclosure [Text Block] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Title of 12(b) Security Title of 12(b) Security Total long-lived assets Long-Lived Assets Statement [Table] Statement [Table] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Other current assets Prepaid Expenses and Other Current Assets [Member] Disclosure Short Term And Long Term Marketable Securities [Abstract] Disclosure Short Term And Long Term Marketable Securities [Abstract] Disclosure - Short-Term and Long-Term Marketable Securities [Abstract] Total unamortized compensation cost Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Gain Contingency, Nature [Domain] Gain Contingency, Nature [Domain] Range [Axis] Statistical Measurement [Axis] Equity forward contract related to accelerated stock repurchase Adjustments to Additional Paid in Capital, Other Subsequent Event Subsequent Event [Member] Cover page. Cover [Abstract] Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Total intangible assets Finite-Lived Intangible Assets, Net Goodwill Balance as of December 31, 2020 Balance as of September 30, 2021 Goodwill Balance at beginning of period Balance at end of period Standard Product Warranty Accrual Disclosure Total Estimated Annual Future Amortization Expense For Acquired Intangible Assets [Abstract] Disclosure Total Estimated Annual Future Amortization Expense For Acquired Intangible Assets [Abstract] Disclosure - Total Estimated Annual Future Amortization Expense for Acquired Intangible Assets [Abstract] Cost of net revenues Cost of Sales [Member] Accrued income taxes Accrued Income Taxes, Current Proceeds from arbitration award Proceeds From Litigation Settlement, Investing Activities Proceeds From Litigation Settlement, Investing Activities Summary of Goodwill by Reportable Segment Schedule of Goodwill [Table Text Block] Forward Contracts Forward Contracts [Member] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Subsequent Event Type [Axis] Subsequent Event Type [Axis] 2018 Credit Facility Credit Facility 2018 [Member] Credit Facility 2018 Schedule of Finite-Lived Intangible Assets by Major Class [Table] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Deferred taxes Deferred Income Tax Expense (Benefit)