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Goodwill and Intangibles - Schedule of Estimated Aggregate Annual Amortization (Detail)
$ in Thousands
Mar. 31, 2019
USD ($)
Finite Lived Intangible Assets Net Amortization Expense Rolling Maturity [Abstract]  
Remainder of 2019 $ 17,719
2020 22,744
2021 21,415
2022 20,494
2023 17,583
Thereafter $ 47,454