Intangible Assets and Goodwill Future Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Aggregate amortization expense associated with intangible assets	$ 32,900	$ 29,400	$ 22,000
2017	52,392
2018	50,963
2019	46,463
2020	46,263
2021	46,184
Thereafter	1,194,114
Total	$ 1,436,379	$ 1,092,952