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LOANS AND ALLOWANCE FOR CREDIT LOSSES (Troubled Debt Restructurings on Financing Receivables) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2017
USD ($)
contract
Financing Receivable, Allowance for Credit Losses [Line Items]  
Number of contracts | contract 2
Premodification outstanding recorded investment $ 1,222
Postmodification outstanding recorded investment $ 1,100
Commercial Real Estate Portfolio Segment [Member]  
Financing Receivable, Allowance for Credit Losses [Line Items]  
Number of contracts | contract 1
Premodification outstanding recorded investment $ 760
Postmodification outstanding recorded investment $ 755
Commercial Portfolio Segment [Member]  
Financing Receivable, Allowance for Credit Losses [Line Items]  
Number of contracts | contract 1
Premodification outstanding recorded investment $ 462
Postmodification outstanding recorded investment $ 345