Annual report pursuant to Section 13 and 15(d)

FEDERAL FUNDS PURCHASED - Additional Information (Detail)

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FEDERAL FUNDS PURCHASED - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
Nov. 08, 2012
Dec. 31, 2011
Dec. 31, 2012
Federal Funds Purchased [Member]
Dec. 31, 2011
Federal Funds Purchased [Member]
Short-term Debt     $ 117.1 $ 79.3
Debt Instrument, Interest Rate, Stated Percentage 8.50%   0.25%  
Line of Credit, Current   $ 140 $ 130