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Commitments and Contingencies - Schedule of Future Minimum Lease Payments under Non-Cancelable Operating Leases (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Feb. 28, 2014
Commitments and Contingencies Disclosure [Abstract]    
2015 $ 5,070us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent  
2016 5,222us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears  
2017 5,394us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears  
2018 5,578us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears  
2019 and thereafter 32,354us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter  
Total payments $ 53,618us-gaap_OperatingLeasesFutureMinimumPaymentsDue $ 72,800us-gaap_OperatingLeasesFutureMinimumPaymentsDue