FAIR VALUE MEASUREMENTS (Narrative) (Details) participant in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) participant	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Fair Value Disclosures [Abstract]
Weighted average pull through rate	80.00%	80.00%
Minimum number of market participants | participant	4
Level 3 Fair value measurements weighted average related to impaired loans	3.00%	1.50%
Level 3 fair value measurements weighted average related to other real estate owned	22.50%	25.10%
Total valuation expenses related to OREO properties | $	$ 1,891	$ 1,017	$ 6,002