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Goodwill and Other Intangible Assets - Estimated Amortization Expenses (Detail)
$ in Thousands
Mar. 31, 2017
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Remaining 2017 $ 29,842
2018 42,667
2019 39,211
2020 34,665
2021 $ 31,514