Annual report pursuant to Section 13 and 15(d)

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Narrative) (Details)

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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Reclassifications of unrealized gains (losses) on AFS   $ 800 $ 205 $ 1,486
Tax expense (benefit) related to (gains) losses on the sale of securities   280 72 415
Transfer from securities available for sale to securities held to maturity $ 201,800 0 0 201,822
Held to maturity securities unrealized gains before tax $ 8,100 3,600 5,200  
Accretion expense   1,000 1,600 1,300
Tax expense (benefit) related to (gains) losses for AFS securities transferred to HTM   362 568 441
Reclassification of unrealized gains (losses) on cash flow hedges   1,300 782 956
Tax expense (benefit) related to (gains) losses on the cash flow hedges   (464) (274) (335)
Amounts reclassified from accumulated other comprehensive income   33 (417) $ (969)
Unrealized Gains (Losses) on BOLI        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Amounts reclassified from accumulated other comprehensive income   $ 363 $ 263