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LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Impaired Loan Balances and Associated Allowance by Portfolio Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment - with an allowance recorded | $ 4,322 | $ 15,196 | $ 4,322 | $ 15,196 | $ 9,280
Unpaid Principal Balance - with an allowance recorded | 4,322 | 15,196 | 4,322 | 15,196 | 9,280
Related Allowance | 834 | 1,704 | 834 | 1,704 | 2,009
Average Recorded Investment - with an allowance recorded | 5,802 | 15,180 | 6,961 | 15,128 | 12,257
Interest Income Recognized - with an allowance recorded | 49 | 40 | 80 | 66 | 153
Recorded Investment - without allowance recorded | 8,269 | 4,884 | 8,269 | 4,884 | 4,310
Unpaid Principal Balance - without allowance recorded | 10,126 | 6,841 | 10,126 | 6,841 | 6,216
Impaired Financing Receivable With No Related Allowance Related Allowance | 0 | 0 | 0 | 0 |
Average Recorded Investment - without allowance recorded | 6,106 | 4,778 | 5,507 | 4,971 | 4,709
Interest Income Recognized - without allowance recorded | 4 | 15 | 18 | 30 | 62
Impaired Financing Receivable, Recorded Investment | 12,591 | 20,080 | 12,591 | 20,080 | 13,590
Impaired financing receivable, unpaid principal balance | 14,448 | 22,037 | 14,448 | 22,037 | 15,496
Impaired Financing Receivable, Average Recorded Investment | 11,908 | 19,958 | 12,468 | 20,099 | 16,966
Impaired Financing Receivable, Interest Income, Accrual Method | 53 | 55 | 98 | 96 | 215
Residential Real Estate |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment - with an allowance recorded | 3,506 | 3,026 | 3,506 | 3,026 | 3,858
Unpaid Principal Balance - with an allowance recorded | 3,506 | 3,026 | 3,506 | 3,026 | 3,858
Related Allowance | 585 | 468 | 585 | 468 | 568
Average Recorded Investment - with an allowance recorded | 3,525 | 3,034 | 3,636 | 3,030 | 3,177
Interest Income Recognized - with an allowance recorded | 39 | 29 | 69 | 55 | 131
Recorded Investment - without allowance recorded | 1,894 | 1,425 | 1,894 | 1,425 | 1,313
Unpaid Principal Balance - without allowance recorded | 2,200 | 1,786 | 2,200 | 1,786 | 1,673
Impaired Financing Receivable With No Related Allowance Related Allowance | 0 | 0 | 0 | 0 |
Average Recorded Investment - without allowance recorded | 1,704 | 1,327 | 1,574 | 1,310 | 1,345
Interest Income Recognized - without allowance recorded | 7 | 5 | 14 | 7 | 15
Commercial Real Estate |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment - with an allowance recorded | 351 | 12,049 | 351 | 12,049 | 5,422
Unpaid Principal Balance - with an allowance recorded | 351 | 12,049 | 351 | 12,049 | 5,422
Related Allowance | 23 | 1,116 | 23 | 1,116 | 1,441
Average Recorded Investment - with an allowance recorded | 1,971 | 11,901 | 3,121 | 11,777 | 8,900
Interest Income Recognized - with an allowance recorded | 10 | 11 | 11 | 11 | 22
Recorded Investment - without allowance recorded | 4,742 | 1,067 | 4,742 | 1,067 | 777
Unpaid Principal Balance - without allowance recorded | 5,080 | 1,303 | 5,080 | 1,303 | 1,084
Impaired Financing Receivable With No Related Allowance Related Allowance | 0 | 0 | 0 | 0 |
Average Recorded Investment - without allowance recorded | 2,556 | 1,251 | 1,963 | 1,477 | 1,132
Interest Income Recognized - without allowance recorded | (3) | 4 |  | 14 | 29
Commercial |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment - with an allowance recorded | 0 | 121 | 0 | 121 | 0
Unpaid Principal Balance - with an allowance recorded | 0 | 121 | 0 | 121 | 0
Related Allowance | 0 | 120 | 0 | 120 | 0
Average Recorded Investment - with an allowance recorded |  | 41 |  | 21 | 31
Recorded Investment - without allowance recorded | 1,611 | 1,946 | 1,611 | 1,946 | 1,791
Unpaid Principal Balance - without allowance recorded | 2,785 | 3,120 | 2,785 | 3,120 | 2,964
Impaired Financing Receivable With No Related Allowance Related Allowance | 0 | 0 | 0 | 0 |
Average Recorded Investment - without allowance recorded | 1,663 | 1,962 | 1,705 | 1,993 | 1,920
Interest Income Recognized - without allowance recorded | 2 | 2 | 4 | 5 | 10
Home Equity |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment - with an allowance recorded | 465 | 0 | 465 | 0 | 0
Unpaid Principal Balance - with an allowance recorded | 465 | 0 | 465 | 0 | 0
Related Allowance | 226 | 0 | 226 | 0 | 0
Average Recorded Investment - with an allowance recorded | 306 | 204 | 204 | 251 | 125
Recorded Investment - without allowance recorded | 22 | 446 | 22 | 446 | 429
Unpaid Principal Balance - without allowance recorded | 61 | 632 | 61 | 632 | 495
Impaired Financing Receivable With No Related Allowance Related Allowance | 0 | 0 | 0 | 0 |
Average Recorded Investment - without allowance recorded | 183 | 236 | 265 | 187 | 310
Interest Income Recognized - without allowance recorded | (2) | 4 |  | 4 | 8
Consumer |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment - with an allowance recorded | 0 | 0 | 0 | 0 | 0
Unpaid Principal Balance - with an allowance recorded | 0 | 0 | 0 | 0 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment - with an allowance recorded |  |  |  |  | 0
Recorded Investment - without allowance recorded | 0 | 0 | 0 | 0 | 0
Unpaid Principal Balance - without allowance recorded | 0 | 0 | 0 | 0 | 0
Impaired Financing Receivable With No Related Allowance Related Allowance | 0 | 0 | 0 | 0 |
Average Recorded Investment - without allowance recorded |  | 2 |  | 4 | 2
HPFC Portfolio Segment |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment - with an allowance recorded | 0 | 0 | 0 | 0 | 0
Unpaid Principal Balance - with an allowance recorded | 0 | 0 | 0 | 0 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment - with an allowance recorded |  |  |  | 49 | 24
Recorded Investment - without allowance recorded | 0 | 0 | 0 | 0 | 0
Unpaid Principal Balance - without allowance recorded | 0 | 0 | 0 | 0 | 0
Impaired Financing Receivable With No Related Allowance Related Allowance | $ 0 | $ 0 | $ 0 | $ 0 |
Average Recorded Investment - without allowance recorded |  |  |  |  | $ 0

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