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Income Taxes - Additional Information (Detail)	3 Months Ended		9 Months Ended
Income Taxes - Additional Information (Detail)	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Statutory Tax Rate	35.00%	35.00%	35.00%	35.00%

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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