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Intangible Assets - Estimated Amortization Expense (Detail)
$ in Thousands
Mar. 31, 2019
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
Remainder of 2019 $ 1,317
2020 2,458
2021 2,319
2022 2,279
2023 1,685
2024 $ 1,611