Income Taxes - Schedule of Difference Between United States Federal Statutory Rate and Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Federal income tax at statutory rate	35.00%	35.00%	35.00%
State income taxes, net of Federal tax benefit	3.90%	4.40%	3.80%
Nondeductible compensation expense	(0.00%)	(0.00%)	1.80%
True-up and rate changes	0.30%	0.90%	(2.60%)
Change in valuation allowance	(260.20%)	(18.60%)	1.20%
Other	0.70%	2.40%	0.10%
Effective tax rate	(220.30%)	24.10%	39.30%