Balance Sheet Components - Additional Information (Details)	6 Months Ended
Jun. 30, 2015
Disclosure Balance Sheet Components Additional Information [Abstract]
Scanners, Warranty period	1 year

Disclosure - Balance Sheet Components - Additional Information [Abstract]

No definition available.

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