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Other Intangible Assets - Estimated Amortization Expense For Intangibles Subject To Amortization (Details)
$ in Thousands
Mar. 31, 2019
USD ($)
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
April 1 to December 31, 2019 $ 3,124
2020 4,165
2021 4,165
2022 4,165
2023 3,168
2024 2,035
Thereafter $ 4,655