Summary of Intangible Asset Account Activity (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Total Intangible Assets [Abstract]
Intangible assets, gross beginning balance	$ 1,000,037	$ 979,814
Intangibles disposed in sale of business	0	(18,140)
Effect of change in exchange rates	(21,109)	9,974
Intangible assets, gross ending balance	978,928	971,648
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