Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 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	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Line Items]
Provisional income tax expense											$ 23,900
Remeasurement of deferred taxes											23,900
Deferred taxes valuation allowance reduction											$ 24,300
Effective income tax rate									22.60%	19.10%	4.40%
Income tax expense	$ (1,649)	$ (34,953)	$ (32,625)	$ 7,790	$ (16,453)	$ (32,454)	$ (33,243)	$ (23,325)	$ (61,437)	$ (105,475)	$ (5,708)
Alternative minimum tax credits	400								400
Valuation allowance	20,382				$ 13,862				20,382	$ 13,862
Federal
Income Tax Disclosure [Line Items]
Net operating loss carryovers	$ 587,100								$ 587,100