Quarterly report pursuant to Section 13 or 15(d)

EMPLOYEE AND DIRECTOR BENEFITS (Assumptions Used To Estimates Fair Value Of Stock Option Award Using Black Scholes Merton Valuation Model) (Detail)

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EMPLOYEE AND DIRECTOR BENEFITS (Assumptions Used To Estimates Fair Value Of Stock Option Award Using Black Scholes Merton Valuation Model) (Detail)
6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected volatility 18.50% 20.00%
Expected term (in years) 7 years 6 months 6 years
Risk-free rate 1.39% 1.02%