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LOANS AND ALLOWANCE FOR CREDIT LOSSES (Impaired Financing Receivables by Loan Class) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance | $ 19,266 | $ 26,160
Recorded investment with no allowance | 10,977 | 10,896
Recorded investment with an allowance | 7,320 | 11,076
Related allowance | 805 | 2,141
Average recorded investment | 19,913 | 25,490
Interest income recognized | 447 | 465
Impaired Nonaccrual Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance | 5,940 | 13,160
Recorded investment with no allowance | 1,813 | 3,015
Recorded investment with an allowance | 3,158 | 5,957
Related allowance | 492 | 1,904
Average recorded investment | 7,155 | 11,565
Impaired Accruing Restructured Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance | 13,326 | 13,000
Recorded investment with no allowance | 9,164 | 7,881
Recorded investment with an allowance | 4,162 | 5,119
Related allowance | 313 | 237
Average recorded investment | 12,758 | 13,925
Interest income recognized | 447 | 465
Residential Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance | 6,156 | 7,888
Recorded investment with no allowance | 3,524 | 4,786
Recorded investment with an allowance | 2,494 | 2,992
Related allowance | 239 | 317
Average recorded investment | 7,022 | 8,163
Interest income recognized | 161 | 195
Residential Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance | 1,620 | 4,013
Recorded investment with no allowance | 1,482 | 1,957
Recorded investment with an allowance |  | 1,946
Related allowance |  | 166
Average recorded investment | 3,191 | 3,500
Residential Portfolio Segment [Member] | Impaired Accruing Restructured Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance | 4,536 | 3,875
Recorded investment with no allowance | 2,042 | 2,829
Recorded investment with an allowance | 2,494 | 1,046
Related allowance | 239 | 151
Average recorded investment | 3,831 | 4,663
Interest income recognized | 161 | 195
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance | 5,613 | 6,737
Recorded investment with no allowance | 4,233 | 2,532
Recorded investment with an allowance | 734 | 3,556
Related allowance | 33 | 185
Average recorded investment | 5,402 | 7,234
Interest income recognized | 185 | 174
Commercial Real Estate Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance | 795 | 1,801
Recorded investment with no allowance | 149 | 959
Recorded investment with an allowance |  | 193
Related allowance |  | 117
Average recorded investment | 542 | 2,144
Commercial Real Estate Portfolio Segment [Member] | Impaired Accruing Restructured Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance | 4,818 | 4,936
Recorded investment with no allowance | 4,084 | 1,573
Recorded investment with an allowance | 734 | 3,363
Related allowance | 33 | 68
Average recorded investment | 4,860 | 5,090
Interest income recognized | 185 | 174
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance | 425 |
Recorded investment with an allowance | 337 |
Related allowance | 33 |
Average recorded investment | 200 | 108
Commercial Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance | 425 |
Recorded investment with an allowance | 337 |
Related allowance | 33 |
Average recorded investment | 200 | 108
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance |  | 99
Recorded investment with no allowance |  | 99
Average recorded investment | 41 | 106
Consumer Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance |  | 99
Recorded investment with no allowance |  | 99
Average recorded investment | 41 | 106
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance | 7,072 | 11,436
Recorded investment with no allowance | 3,220 | 3,479
Recorded investment with an allowance | 3,755 | 4,528
Related allowance | 500 | 1,639
Average recorded investment | 7,248 | 9,879
Interest income recognized | 101 | 96
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance | 3,100 | 7,247
Recorded investment with no allowance | 182 |
Recorded investment with an allowance | 2,821 | 3,818
Related allowance | 459 | 1,621
Average recorded investment | 3,181 | 5,707
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] | Impaired Accruing Restructured Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Unpaid principal balance | 3,972 | 4,189
Recorded investment with no allowance | 3,038 | 3,479
Recorded investment with an allowance | 934 | 710
Related allowance | 41 | 18
Average recorded investment | 4,067 | 4,172
Interest income recognized | $ 101 | $ 96

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