Income Taxes - Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Statutory tax rate	19.00%
Income tax (benefit) expense at the statutory rate	$ 12,309	$ 2,681	$ (29,769)
Provision to return and deferred tax adjustments	157	1,017	(264)
U.S. state tax, net of federal benefit	3,095	637	2,181
Permanent adjustments	606	738	1,411
Tax rates in excess of (less than) statutory tax rates	1,143	2,247	(18,398)
Impact of Finance Structure	(4,434)	354	(5,734)
Nondeductible/(nontaxable) transaction costs	(3,816)	(425)	6,743
Goodwill impairment (non-deductible)	1,941	0	41,510
US Tax Reform (net impact)	764	(435)	(11,569)
Share-based Compensation	2,223	2,107	(2,464)
Capital Gains	0	851	0
Other	499	48	(206)
Subtotal	14,487	9,820	(16,559)
Change in valuation allowance	2,035	637	7,267
Total income tax expense (benefit)	$ 16,522	$ 10,457	$ (9,292)