COMMITMENTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Commitments to make loans | Maximum
Commitments
Period of commitments to make loans	60 days
Commitments to extend credit and unused lines of credit at fixed rate
Commitments
Financial instruments whose contract amount represents credit risk	$ 85,998	$ 91,076
Commitments to extend credit and unused lines of credit at variable rate
Commitments
Financial instruments whose contract amount represents credit risk	$ 888,073	809,004
Fixed Rate | Minimum
Commitments
Interest rates on commitments (as a percent)	1.50%
Maturity period of commitments	1 year
Fixed Rate | Maximum
Commitments
Interest rates on commitments (as a percent)	19.80%
Maturity period of commitments	32 years
Variable Rate
Commitments
Financial instruments whose contract amount represents credit risk	$ 5,264	$ 6,575