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Other Intangible Assets (Estimated Amortization Expense for Finite-Lived Intangible Assets) (Detail)
$ in Thousands
Mar. 31, 2019
USD ($)
Intangible Assets Net Excluding Goodwill [Abstract]  
Remainder of 2019 $ 18,515
2020 14,473
2021 11,080
2022 10,339
2023 9,851
2024 $ 7,197