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Commitments - Schedule of Future Minimum Rental Commitments under Non-cancelable Operating Leases (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]  
2015 $ 20,423us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
2016 19,637us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
2017 12,599us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
2018 5,822us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
2019 1,359us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
Thereafter 0us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Total minimum lease payments, gross 59,840us-gaap_OperatingLeasesRentExpenseMinimumRentals
Less: Sublease income (8,863)us-gaap_OperatingLeasesRentExpenseSubleaseRentals1
Total minimum lease payments, net $ 50,977us-gaap_OperatingLeasesFutureMinimumPaymentsDue