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Basis of Presentation and Significant Accounting Policies - Schedule of Intangible Assets, Future Amortization Expense (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Accounting Policies [Abstract]    
2019 $ 11,020  
2020 7,737  
2021 6,320  
2022 935  
2023 923  
Thereafter 4,134  
Total $ 31,069 $ 33,895