Income Taxes - Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Federal income tax rate	35.00%	35.00%	35.00%
State income taxes, net of Federal tax effect	6.80%	6.10%	3.20%
Non-deductible compensation	0.20%	0.00%	1.10%
Non-deductible meals and entertainment	1.00%	0.70%	1.10%
Other	(1.60%)	(1.50%)	(1.70%)
Effective tax rate	41.40%	40.30%	38.70%