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Intangible Assets and Goodwill - Estimated Amortization Expense of Definite-Lived Intangibles Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Finite Lived Intangible Assets Future Amortization Expense Current And Five Succeeding Fiscal Years [Abstract]    
2017 $ 41,680  
2018 30,887  
2019 28,419  
2020 24,992  
2021 24,857  
Thereafter 173,902  
Net $ 324,737 $ 314,361