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Intangible Assets, Net - Schedule of Estimated Amortization Expense of Intangible Assets Succeeding Years (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]    
Remainder of 2019 $ 22,569  
2020 29,945  
2021 29,933  
2022 29,809  
2023 29,148  
2024 and thereafter 146,351  
Definite-lived intangible assets, net $ 287,755 $ 295,296