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Goodwill and Intangible Assets - Schedule of Estimated Intangible Asset Amortization Expense (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Finite Lived Intangible Assets Future Amortization Expense Current And Five Succeeding Fiscal Years [Abstract]    
Remainder of 2019 $ 28,229  
2020 32,113  
2021 25,050  
2022 15,411  
2023 8,378  
Thereafter 6,205  
Net $ 115,386 $ 126,054