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Income Taxes To The Federal Statutory Rate (Detail)	12 Months Ended
Income Taxes To The Federal Statutory Rate (Detail)	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory rate	34.00%	34.00%
State income taxes, net of federal benefit	4.60%	4.50%
Effective income tax rate, continuing operations	38.60%	38.50%

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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- Definition

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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