INTEREST RATE SWAPS - INTEREST EXPENSE (Details) - Interest rate swap - Cash flow hedge - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Information about derivatives and swaps
Interest expense swap on money market deposits	$ 109	$ 168	$ 198
Interest expense swap on FHLB Advance	110	164	204
Total interest expense on swap transaction	$ 219	$ 332	$ 402