v2.4.0.6
Document and Entity Information
3 Months Ended
Mar. 31, 2013
Apr. 26, 2013
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 Mar. 31, 2013  
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   81,557,143