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LONG-TERM OBLIGATIONS - Advance Commitments (Details) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Federal Home Loan Bank, Optional Advance Commitment [Line Items]                      
Option fee, fair value $ 0       $ 0       $ 0 $ 0  
Par in long-term advance commitments from the FHLB 200,000,000               200,000,000    
Long-term advance commitments expired unexercised                 50,000,000 150,000,000  
FHLB advance option impairment charges $ 0 $ 0 $ 0 $ 0 $ 0 $ 195,000 $ 1,364,000 $ 472,000 $ 0 $ 2,031,000 $ 8,923,000
Years of option to fund, lower range                 1 year 6 months    
Years of options to fund, upper range                 2 years