Income Taxes - Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation (Detail)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal income tax rate	35.00%	35.00%	35.00%
State income taxes, net of Federal tax effect	3.20%	4.10%	5.20%
Non-deductible goodwill impairment	0.00%	4.30%	(3.40%)
Non-deductible compensation	1.10%	0.00%	0.00%
Non-deductible meals and entertainment	1.10%	5.20%	0.00%
Other	(1.70%)	3.00%	(0.30%)
Effective tax rate	38.70%	51.60%	36.50%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to impairment loss.

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