SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE (Details) - Securities sold under agreement to repurchase - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Securities sold under agreements to repurchase
Average daily balance during the year	$ 867	$ 45,630
Average interest rate during the year (as a percent)	0.05%	0.85%
Maximum month-end balance during the year	$ 1,300	$ 51,197
Weighted average interest rate at year-end (as a percent)	0.05%	0.83%