Income Taxes - Reconciliation of Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Tax at statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	3.00%	4.00%	3.00%
Uncertain tax positions	0.00%	0.00%	(22.00%)
IRS audit resolution	0.00%	0.00%	11.00%
Effect of net income attributable to noncontrolling interests	(0.00%)	2.00%	(0.00%)
Change in valuation allowance	(7.00%)	12.00%	2.00%
Other, net	(1.00%)	2.00%	0.00%
Income tax expense	30.00%	55.00%	29.00%
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Tax at statutory rate	$ 24,432	$ 23,675	$ 47,922
State taxes, net of federal benefit	2,010	2,717	4,357
Uncertain tax positions	0	0	(30,961)
IRS audit resolution	0	0	15,505
Effect of net income attributable to noncontrolling interests	(91)	1,492	0
Change in valuation allowance	(5,125)	7,812	2,165
Other, net	(182)	1,276	361
Income tax expense	$ 21,044	$ 36,972	$ 39,349