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ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Troubled Debt Restructuring) (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Troubled Debt Restructuring [Abstract]    
Accruing troubled debt restructured loans $ 4,085 $ 2,893
Nonaccrual troubled debt restructured loans 7,945 7,750
Total troubled debt restructured loans $ 12,030 $ 10,643