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Goodwill and Intangible Assets - Remaining Estimated Amortization Expense (Detail)
$ in Thousands
Dec. 31, 2015
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2016 $ 15,378
2017 14,839
2018 13,415
2019 12,103
2020 10,420
Thereafter 22,540
Remaining amortization expense $ 88,695