Income Taxes - Reconciliation of Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Tax at statutory rate	$ 29,544	$ 22,899	$ 28,150
State taxes, net of federal benefit	6,859	6,450	3,548
Effect of U.S. tax reform (the Tax Act)	0	0	13,074
Effect of net (income) loss attributable to noncontrolling interests	(968)	(171)	(1,017)
Change in valuation allowance	(1,330)	4,508	(2,613)
Other, net	1,072	(725)	(652)
Income tax expense (benefit)	$ 35,177	$ 32,961	$ 40,490
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Tax at statutory rate	21.00%	21.00%	35.00%
State taxes, net of federal benefit	5.00%	6.00%	4.00%
Effect of U.S. tax reform (the Tax Act)	0	0	0.16
Effect of net (income) loss attributable to noncontrolling interests	(1.00%)	0.00%	(1.00%)
Change in valuation allowance	(1.00%)	4.00%	(3.00%)
Other, net	1.00%	(1.00%)	(1.00%)
Income tax expense (benefit)	25.00%	30.00%	50.00%