Summary of Intangible Asset Account Activity (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Total Intangible Assets [Abstract]
Intangible Assets, gross beginning balance	$ 979,814	$ 981,160
Intangibles disposed in sale of business	(18,140)	0
Effect of change in exchange rates	9,974	(15,574)
Intangible Assets, gross ending balance	971,648	965,586
Intangible Liabilities, gross beginning balance	(23,900)	(23,900)
Effect of change in exchange rates	0	0
Intangible Liabilities, gross ending balance	$ (23,900)	$ (23,900)