Intangible Assets Summary of Intangible Asset Account Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Total Intangible Assets [Abstract]
Beginning balance, Finite-Lived Intangible Assets, Gross	$ 702,507	$ 748,148
Intangible assets acquired	0	4,827
Impairment of Intangible Assets, Finite-lived	0	497
Effect of change in exchange rates	(32,611)	(49,971)
Ending balance, Finite-Lived Intangible Assets, Gross	$ 669,896	$ 702,507