Intangible Assets and Liabilities - Summary of Intangible Asset Account Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Beginning balance, Finite-lived intangible assets, gross	$ 979,814	$ 981,160
Effect of change in exchange rates	38,363	(1,346)
Ending balance, Finite-lived intangible assets, gross	1,000,037	979,814
FiniteLivedIntangibleAssetsDisposedInSaleOfBusiness	(18,140)	0
Finite-lived intangible liabilities, gross	(23,900)	(23,900)	$ (23,900)
Effect of change in exchange rates	0	0
Intangible assets, gross (excluding goodwill)	$ 1,000,037	$ 979,814