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Minimum Future Lease Payments for Non-Cancelable Leases (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Disclosure Minimum Future Lease Payments For Non Cancelable Leases [Abstract]  
Remainder of 2015 $ 7,233algn_OperatingLeasesFutureMinimumPaymentsDueRemainderOfPeriod
2015 9,194us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
2016 5,463us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
2017 2,041us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
2018 188us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
Thereafter 188us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Total minimum lease payments $ 24,307us-gaap_OperatingLeasesFutureMinimumPaymentsDue