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Basis of Presentation - Intangible Asset Amortization Expense by Year (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
2020 (9 months) $ 11,619  
2021 15,304  
2022 12,800  
2023 10,091  
2024 7,073  
2025 and thereafter 11,596  
Total Future Intangible Asset Amortization $ 68,483 $ 72,789