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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Commitments to extend credit    
FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK    
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability $ 1,030,322 $ 917,405
Standby letters of credit and financial guarantees written    
FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK    
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability $ 13,377 13,551
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   2,494
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   $ 18,748