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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Difference Between Customary Rate and Effective Tax Rate on Income Before Income Taxes Due (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation [Line Items]
Tax at statutory rate	35.00%	35.00%	35.00%	35.00%
Tax effect of:
Nondeductible stock-based compensation	0.60%	(55.90%)	(1.40%)	(51.20%)
State income taxes, net of federal benefit	0.30%	(4.20%)	1.10%	(4.80%)
Other	(0.10%)	(4.40%)	(0.20%)	(4.10%)
Effective tax rate - Tax Benefit	35.80%	(29.50%)	34.50%	(25.10%)

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A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to differences in the deductibility or nondeductibility of incentive stock options and other equity-based compensation costs in accordance with generally accepted accounting principles and enacted tax laws.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the state and local income tax expense or benefit, net of the federal tax benefit (expense) thereon, recorded during the period.

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