Intangible Assets and Impairment - Future Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2016	$ 90,381
2017	89,985
2018	89,047
2019	82,719
2020	76,469
Thereafter	442,528
Total expected amortization	$ 871,129	$ 956,300