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Goodwill and Other Intangible Assets - Schedule of Estimated Amortization Expense (Detail)
$ in Thousands
Dec. 31, 2018
USD ($)
Finite-Lived Intangible Assets [Line Items]  
Remaining 2019 $ 10,211
2020 18,428
2021 17,336
2022 15,222
2023 14,019
2024 and thereafter 41,037
Software Developed Other Than For Internal Use [Member]  
Finite-Lived Intangible Assets [Line Items]  
Remaining 2019 1,761
2020 3,521
2021 3,521
2022 3,521
2023 607
2024 and thereafter 77
Software [Member]  
Finite-Lived Intangible Assets [Line Items]  
Remaining 2019 4,555
2020 7,944
2021 5,652
2022 4,061
2023 2,416
2024 and thereafter $ 2,686