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Intangible Assets and Goodwill - Estimated Future Amortization of Intangible Assets, Other Than Goodwill (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Finite Lived Intangible Assets Future Amortization Expense Current And Five Succeeding Fiscal Years [Abstract]  
2017 $ 19,643
2018 14,807
2019 14,632
2020 14,441
2021 14,065
Estimated future amortization expense over next five years $ 77,588