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Intangible Assets, Net - Schedule of Estimated Amortization Expense of Intangible Assets Succeeding Years (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
2018 $ 7,541  
2019 30,110  
2020 29,945  
2021 29,934  
2022 29,809  
2023 and thereafter 175,498  
Definite-lived intangible assets, net $ 302,837 $ 258,438