Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Tax at federal statutory rate													$ (67,795)	$ (60,845)	$ (100,093)
State taxes, net of federal effect													26	191	25
Impact on noncontrolling interest													4,001	3,725	6,347
Non-U.S. tax effect													264	960	(437)
Nondeductible expenses													144	6,796	5,698
Stock-based compensation													6,484	3,892	4,854
U.S. tax reform impact													0	0	239,117
U.S. tax on foreign earnings (GILTI)													221	127	0
Change in valuation allowance													57,288	46,691	(154,875)
Provision for income taxes	$ 31	$ 136	$ 258	$ 208	$ 1,079	$ (3)	$ 128	$ 333	$ 466	$ 461	$ 602	$ 458	$ 633	$ 1,537	$ 636