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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Commitments to extend credit    
FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK    
Financial instruments whose contract amounts represent credit risk   $ 801,835
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability $ 801,835  
Standby letters of credit and financial guarantees written    
FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK    
Financial instruments whose contract amounts represent credit risk   13,434
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability 13,434  
Interest rate options    
FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK    
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability 879 24,009
Forward interest rate contracts    
FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK    
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability 32,497 9,973
Interest rate lock commitments | Not Designated as Hedging Instrument [Member] | Interest rate options    
FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK    
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability   24,009
Forward Contracts [Member] | Not Designated as Hedging Instrument [Member] | Forward interest rate contracts    
FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK    
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability   $ 9,973
Reported Value Measurement [Member] | Commitments to extend credit    
FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK    
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability 825,304  
Reported Value Measurement [Member] | Standby letters of credit and financial guarantees written    
FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK    
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability $ 16,073