Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Income Tax [Line Items]
Income tax (expense) benefit	$ (33)		$ 1,000	$ 2,155	$ 5,778
Income (loss) from continuing operations before income taxes	(238,268)		$ 23,300	(280,264)	$ 26,512
Discrete income tax benefit from AMT credit		$ 2,123
Increase (decrease) in deferred tax asset valuation allowance				74,694
AMT credit to be refunded during year	68,252			68,252
Prepaid Expenses and Other Current Assets
Income Tax [Line Items]
AMT credit	$ 67,131			$ 67,131		$ 33,065