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SHORT-TERM BORROWINGS AND LONG-TERM DEBT (Details) - USD ($)
Sep. 30, 2015
Dec. 31, 2014
LONG-TERM DEBT    
Short-term borrowings $ 155,000,000 $ 38,000,000
Long term borrowings 92,785,000 92,785,000
Investment securities pledged as collateral 1,010,000,000 900,500,000
Federal Home Loan Bank Borrowings    
LONG-TERM DEBT    
Line of Credit, maximum borrowing capacity 1,200,000,000.0  
Short-term borrowings 155,000,000 38,000,000
Long term borrowings 0 0
Investment securities pledged as collateral 600,000  
Commercial real estate and commercial loans pledged as collateral 1,600,000,000  
Additional unused borrowings available 1,000,000,000  
Federal Reserve discount window line of credit    
LONG-TERM DEBT    
Commercial real estate and commercial loans pledged as collateral 91,800,000 72,900,000
Additional unused borrowings available $ 44,200,000 $ 33,300,000