Income Taxes - Reconciliation of Actual Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income tax (expense) benefit at the federal statutory rate	$ 37,159	$ (25,840)	$ 48,869
State income tax (expense) benefit, net of federal tax effect	6,002	(5,144)	4,030
Change in federal tax rate	0	0	(64,949)
Refundable AMT credits	0	0	(1,402)
Nondeductible equity-based compensation	1,895	3,101	13,655
Nondeductible costs in connection with Merger	0	(2,545)	0
Other permanent items	(157)	(418)	(37)
Change in valuation allowance	628	36,321	(35,684)
Change in valuation allowance due to TCJA	0	0	64,949
Change in valuation allowance - Section 382	0	64,994	0
Change in apportioned state tax rates	(275)	723	1,086
Eliminate UT jurisdiction NOL's and credits	0	0	(2,647)
Change in ownership - Section 382	0	(64,994)	0
Other, net	104	(377)	210
Income tax (expense) benefit	$ 42,116	$ (1,827)	$ 1,402