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EARNINGS PER SHARE - Additional Information (Detail)
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Earnings Per Share Disclosure [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share2,884,3142,245,1902,699,7902,022,549