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Goodwill and Intangible Assets - Amortization Expense Related to Intangible Assets (Detail)
$ in Thousands
Mar. 31, 2019
USD ($)
Amortization expense related to intangible assets:  
Remainder of 2019 $ 3,647
2020 4,780
2021 4,724
2022 4,548
2023 4,409
Thereafter 21,141
Total $ 43,249