Quarterly report pursuant to Section 13 or 15(d)

INCOME TAXES - Additional Information (Detail)

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INCOME TAXES - Additional Information (Detail) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Schedule Of Income Taxes [Line Items]        
Increase in liability for unrecognized tax benefit $ 2,000 $ 2,000 $ 4,000 $ 4,000