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LOANS AND ALLOWANCE FOR LOAN LOSSES (Loan Aging Analysis by Portfolio Segment) (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2018
--- | --- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | $ 18,335 | $ 17,812 |
Current | 3,081,989 | 3,008,410 |
Total Loans Outstanding | 3,100,324 | 3,026,222 | $ 2,867,529
Loans 90 Days Past Due and Accruing | 14 | 14 |
Non-Accrual Loans | 11,445 | 10,530 |
Residential Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 7,227 | 9,866 |
Current | 1,028,565 | 983,000 |
Total Loans Outstanding | 1,035,792 | 992,866 | 907,910
Loans 90 Days Past Due and Accruing | 0 | 0 |
Non-Accrual Loans | 5,566 | 5,492 |
Commercial Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 4,743 | 3,271 |
Current | 1,255,896 | 1,266,262 |
Total Loans Outstanding | 1,260,639 | 1,269,533 | 1,190,052
Loans 90 Days Past Due and Accruing | 0 | 0 |
Non-Accrual Loans | 1,590 | 1,380 |
Commercial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 2,168 | 968 |
Current | 426,508 | 380,812 |
Total Loans Outstanding | 428,676 | 381,780 | 386,393
Loans 90 Days Past Due and Accruing | 0 | 0 |
Non-Accrual Loans | 785 | 1,279 |
Home Equity |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 3,207 | 2,990 |
Current | 320,329 | 324,773 |
Total Loans Outstanding | 323,536 | 327,763 | 323,671
Loans 90 Days Past Due and Accruing | 0 | 0 |
Non-Accrual Loans | 2,672 | 1,846 |
Consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 438 | 111 |
Current | 23,227 | 20,513 |
Total Loans Outstanding | 23,665 | 20,624 | 19,506
Loans 90 Days Past Due and Accruing | 14 | 14 |
Non-Accrual Loans | 367 | 15 |
HPFC Portfolio Segment |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 552 | 606 |
Current | 27,464 | 33,050 |
Total Loans Outstanding | 28,016 | 33,656 | $ 39,997
Loans 90 Days Past Due and Accruing | 0 | 0 |
Non-Accrual Loans | 465 | 518 |
30-59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 5,938 | 6,218 |
30-59 Days Past Due | Residential Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,530 | 3,300 |
30-59 Days Past Due | Commercial Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 2,194 | 1,794 |
30-59 Days Past Due | Commercial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,380 | 150 |
30-59 Days Past Due | Home Equity |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 777 | 907 |
30-59 Days Past Due | Consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 57 | 67 |
30-59 Days Past Due | HPFC Portfolio Segment |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
60-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 3,880 | 3,239 |
60-89 Days Past Due | Residential Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,396 | 2,046 |
60-89 Days Past Due | Commercial Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 2,126 | 369 |
60-89 Days Past Due | Commercial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 20 | 19 |
60-89 Days Past Due | Home Equity |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 153 | 607 |
60-89 Days Past Due | Consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 14 | 15 |
60-89 Days Past Due | HPFC Portfolio Segment |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 171 | 183 |
Greater than 90 Days |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 8,517 | 8,355 |
Greater than 90 Days | Residential Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 4,301 | 4,520 |
Greater than 90 Days | Commercial Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 423 | 1,108 |
Greater than 90 Days | Commercial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 768 | 799 |
Greater than 90 Days | Home Equity |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 2,277 | 1,476 |
Greater than 90 Days | Consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 367 | 29 |
Greater than 90 Days | HPFC Portfolio Segment |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | $ 381 | $ 423 |

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