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BORROWINGS Borrowings - - Additional Information (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Sep. 30, 2013
Maximum
Debt Instrument [Line Items]      
Federal Home Loan Bank short-term borrowings $ 518,200 $ 502,000  
Securities Sold under Agreements to Repurchase $ 52,500 $ 65,000  
Securities Sold under Agreements to Repurchase, Remaining Contractual Term     2 years
Assets Sold under Agreements to Repurchase, Interest Rate 3.49% 3.50%