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LOAN SERVICING (The characteristics and sensitivity of the fair value of MSRs to changes in key assumptions) (Details) - Mortgage Loan Servicing - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Servicing Liabilities at Fair Value [Line Items]    
Composition of mortgage loans serviced for others: (as a percent) 100.00% 100.00%
Weighted average life (years) 5 years 9 months 11 days 5 years 9 months 7 days
Prepayment speed (as a percent) 12.54% 12.62%
Discount rate (as a percent) 9.49% 9.60%
0.25% $ 716 $ 566
0.50% 1,064 801
- 0.25% (760) (668)
- 0.50% $ (962) $ (844)
Fixed rate loans    
Servicing Liabilities at Fair Value [Line Items]    
Composition of mortgage loans serviced for others: (as a percent) 99.89% 99.86%
Adjustable rate loans    
Servicing Liabilities at Fair Value [Line Items]    
Composition of mortgage loans serviced for others: (as a percent) 0.11% 0.14%