Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax benefit at statutory rate	$ (33,663)	$ (44,422)	$ (19,673)
Branch profits tax	(8,015)	(12,129)	(4,267)
State taxes, net of federal benefit	(3,206)	154	(27)
Restricted stock units tax shortfall	1,695	405	1,025
Taxes on foreign earnings at higher rates	11,399	14,427	13,095
Effect of tax rate change	0	0	(2,929)
Effect of moving activity to higher tax rate jurisdiction	0	0	(14,620)
Management fee charged to international operations	4,848	3,455	1,515
Increase in valuation allowances	34,005	37,802	22,892
Goodwill impairment	(1,406)	25,677	0
Return-to-provision adjustments	(2,299)	(524)	(521)
Foreign tax credit	(6,574)	(5,707)	0
Other	(865)	4,656	560
Total income tax expense (benefit)	$ (4,081)	$ 23,794	$ (2,950)