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Commitments and Contingencies (Detail) - Future Minimum Annual Cash Payments Under Non-Cancelable Operating Lease Agreements (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]  
2015 $ 35,230us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
2016 28,515us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
2017 22,930us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
2018 18,795us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
2019 16,740us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
Thereafter 100,960us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Total minimum lease payments $ 223,170us-gaap_OperatingLeasesFutureMinimumPaymentsDue [1]
[1] Excludes $0.1 million of future contractual sublease rental income.