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LOANS AND ALLOWANCE FOR LOAN LOSSES (Loan Aging Analysis by Portfolio Segment) (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 USD ($) loan | Sep. 30, 2016 USD ($) loan | Sep. 30, 2017 USD ($) loan | Sep. 30, 2016 USD ($) loan | Dec. 31, 2016 USD ($)
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Number of TDRs | loan | 3 | 6 | 5 | 6 |
Total Past Due | $ 21,622,000 |  | $ 21,622,000 |  | $ 25,465,000
Current | 2,726,668,000 |  | 2,726,668,000 |  | 2,569,099,000
Total Loans Outstanding | 2,748,290,000 | $ 2,592,009,000 | 2,748,290,000 | $ 2,592,009,000 | 2,594,564,000
Loans 90 Days Past Due and Accruing | 0 |  | 0 |  | 0
Non-Accrual Loans | 14,646,000 |  | 14,646,000 |  | 20,713,000
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 429,000 | 1,344,000 | 895,000 | 1,344,000 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | 448,000 | 1,652,000 | 914,000 | 1,652,000 |
Allowance Related to Troubled Debt Restructurings assigned during period | 29,000 | 0 | 44,000 | 0 |
Residential Real Estate |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 6,858,000 |  | 6,858,000 |  | 5,611,000
Current | 845,993,000 |  | 845,993,000 |  | 796,883,000
Total Loans Outstanding | 852,851,000 | 797,036,000 | 852,851,000 | 797,036,000 | 802,494,000
Loans 90 Days Past Due and Accruing | 0 |  | 0 |  | 0
Non-Accrual Loans | 4,465,000 |  | 4,465,000 |  | 3,945,000
Commercial Real Estate |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 8,057,000 |  | 8,057,000 |  | 13,703,000
Current | 1,123,826,000 |  | 1,123,826,000 |  | 1,037,077,000
Total Loans Outstanding | 1,131,883,000 | 1,054,307,000 | 1,131,883,000 | 1,054,307,000 | 1,050,780,000
Loans 90 Days Past Due and Accruing | 0 |  | 0 |  | 0
Non-Accrual Loans | 5,887,000 |  | 5,887,000 |  | 12,849,000
Commercial |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 2,205,000 |  | 2,205,000 |  | 2,526,000
Current | 366,950,000 |  | 366,950,000 |  | 331,113,000
Total Loans Outstanding | 369,155,000 | 324,422,000 | 369,155,000 | 324,422,000 | 333,639,000
Loans 90 Days Past Due and Accruing | 0 |  | 0 |  | 0
Non-Accrual Loans | 1,830,000 |  | 1,830,000 |  | 2,088,000
Home Equity |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 2,681,000 |  | 2,681,000 |  | 2,347,000
Current | 325,647,000 |  | 325,647,000 |  | 327,560,000
Total Loans Outstanding | 328,328,000 | 333,095,000 | 328,328,000 | 333,095,000 | 329,907,000
Loans 90 Days Past Due and Accruing | 0 |  | 0 |  | 0
Non-Accrual Loans | 1,626,000 |  | 1,626,000 |  | 1,620,000
Consumer |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 44,000 |  | 44,000 |  | 42,000
Current | 18,079,000 |  | 18,079,000 |  | 17,290,000
Total Loans Outstanding | 18,123,000 | 17,416,000 | 18,123,000 | 17,416,000 | 17,332,000
Loans 90 Days Past Due and Accruing | 0 |  | 0 |  | 0
Non-Accrual Loans | 0 |  | 0 |  | 4,000
HPFC Portfolio Segment |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 1,777,000 |  | 1,777,000 |  | 1,236,000
Current | 46,173,000 |  | 46,173,000 |  | 59,176,000
Total Loans Outstanding | 47,950,000 | $ 65,733,000 | 47,950,000 | $ 65,733,000 | 60,412,000
Loans 90 Days Past Due and Accruing | 0 |  | 0 |  | 0
Non-Accrual Loans | 838,000 |  | 838,000 |  | 207,000
30-59 Days Past Due |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 6,762,000 |  | 6,762,000 |  | 4,639,000
30-59 Days Past Due | Residential Real Estate |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 3,308,000 |  | 3,308,000 |  | 1,783,000
30-59 Days Past Due | Commercial Real Estate |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 1,036,000 |  | 1,036,000 |  | 855,000
30-59 Days Past Due | Commercial |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 721,000 |  | 721,000 |  | 633,000
30-59 Days Past Due | Home Equity |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 1,022,000 |  | 1,022,000 |  | 892,000
30-59 Days Past Due | Consumer |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 29,000 |  | 29,000 |  | 38,000
30-59 Days Past Due | HPFC Portfolio Segment |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 646,000 |  | 646,000 |  | 438,000
60-89 Days Past Due |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 2,550,000 |  | 2,550,000 |  | 2,187,000
60-89 Days Past Due | Residential Real Estate |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 157,000 |  | 157,000 |  | 924,000
60-89 Days Past Due | Commercial Real Estate |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 1,260,000 |  | 1,260,000 |  | 223,000
60-89 Days Past Due | Commercial |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 0 |  | 0 |  | 218,000
60-89 Days Past Due | Home Equity |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 284,000 |  | 284,000 |  | 134,000
60-89 Days Past Due | Consumer |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 15,000 |  | 15,000 |  | 0
60-89 Days Past Due | HPFC Portfolio Segment |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 834,000 |  | 834,000 |  | 688,000
Greater than 90 Days |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 12,310,000 |  | 12,310,000 |  | 18,639,000
Greater than 90 Days | Residential Real Estate |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 3,393,000 |  | 3,393,000 |  | 2,904,000
Greater than 90 Days | Commercial Real Estate |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 5,761,000 |  | 5,761,000 |  | 12,625,000
Greater than 90 Days | Commercial |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 1,484,000 |  | 1,484,000 |  | 1,675,000
Greater than 90 Days | Home Equity |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 1,375,000 |  | 1,375,000 |  | 1,321,000
Greater than 90 Days | Consumer |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | 0 |  | 0 |  | 4,000
Greater than 90 Days | HPFC Portfolio Segment |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Total Past Due | $ 297,000 |  | $ 297,000 |  | $ 110,000
Commercial | Extended Maturity [Member] |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |
Number of TDRs | loan | 0 | 6 | 0 | 6 |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 0 | $ 1,344,000 | $ 0 | $ 1,344,000 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | 0 | 1,652,000 | 0 | 1,652,000 |
Allowance Related to Troubled Debt Restructurings assigned during period | $ 0 | $ 0 | $ 0 | $ 0 |

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