FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Investments in limited partnerships	$ 5,300
Commitment to fund additional amount to limited partnerships	7,100
FHLB advances
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Amount available under line of credit	275,100
Line of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Amount of federal funds lines of credit available through correspondent banks	30,000
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or notional amount	253,068	$ 291,459
Letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or notional amount	$ 8,520	$ 10,088