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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