Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Tax carryforwards
Net operating loss carryforwards, tax effected	$ 96,710	$ 99,240
Effective tax rate	7.90%	18.30%	10.40%
Federal tax rate	21.00%
Tax adjustment relating to REIT	$ 60,378	$ 40,577	$ 35,165
Foreign tax rate differential provision (benefit)	9,472	8,562	1,031
Tax benefit as a result of the resolution of a tax matter			(14,000)
Increase in valuation allowance (net operating losses)	8,337	(6,211)	(3,568)
Incremental foreign earnings	262,379
Increase in gross interest and penalties recorded	1,499	1,780	1,961
Accrued interest and penalties recorded	6,212	9,282
Unrecognized tax benefits	25,969	35,068	$ 35,320	$ 38,533
Unrecognized tax benefits included in other long-term liabilities	23,402	31,992
Deferred income taxes including unrecognized tax benefits	2,567	$ 3,076
Unrecognized tax benefits that would impact tax rate	2,989
Foreign
Tax carryforwards
Net operating loss carryforwards, tax effected	$ 92,142
Net operating loss carryforwards subject to valuation allowance (as a percent)	43.00%