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OTHER BORROWINGS AND OTHER LIABILITIES - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
1 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Aug. 25, 2010
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
FRB [Member]
Dec. 31, 2011
FRB [Member]
Sep. 30, 2012
FHLB [Member]
Dec. 31, 2011
FHLB [Member]
Line of Credit Facility [Line Items]                  
Weighted average cost on all long term debt   10.80% 10.97% 10.81% 11.39% 0.24%   0.25%  
Public offering $ 75                
Interest bearing on public offering 10.00%                
Proceeds from Issuance of Senior Long-term Debt 72.8                
Additional available credit with the entity           659.00 696.60 1.05 843.40
Reduction in basis points       Five basis points          
Reduced interest margin   $ 138.3   $ 138.3