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Goodwill and Intangible Assets, Net - Schedule of Expected Future Annual Amortization Expense related to Intangible Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Estimated Amortization Expense    
Remainder of Year Ending December 31, 2018 $ 139,239  
Year Ending December 31, 2019 48,552  
Year Ending December 31, 2020 40,930  
Year Ending December 31, 2021 40,718  
Year Ending December 31, 2022 40,663  
Thereafter 276,804  
Total $ 586,906 $ 564,070