Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Effective Tax Rate	21.00%	21.00%	35.00%
Effective income tax rate continuing operations tax rate reconciliation
U.S. Federal income tax expense at statutory rates of 21, 21 and 35 percent, respectively	$ (81,724)	$ (62,619)	$ 38,349
State taxes, net of federal income tax benefit	12,342	1,618	8,160
Tax position on government incentives	127,950	72,244	9,402
Change in enacted tax rates	0	0	(123,289)
Research & development tax credit	2,703	0	0
Unrecognized tax benefits	(24)	(272)	0
Other	2,082	1,862	(2,494)
Total benefit (expense) for income taxes before valuation allowances	63,329	12,833	(69,872)
Valuation allowances	(62,759)	(18,704)	100,362
Income tax benefit (expense)	$ 570	$ (5,871)	$ 30,490