Balance Sheet Components - Additional Information (Details)	9 Months Ended
Sep. 30, 2016
Disclosure Balance Sheet Components Additional Information [Abstract]
Scanners, Warranty period	1 year

Disclosure - Balance Sheet Components - Additional Information [Abstract]

No definition available.

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Namespace Prefix:	algn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration