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LOANS AND ALLOWANCE FOR LOAN LOSSES (Loan Aging Analysis by Portfolio Segment) (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019
--- | --- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | $ 13,817 | $ 12,089 |
Current | 3,143,945 | 3,082,934 |
Total Loans Outstanding | 3,157,762 | 3,095,023 | $ 3,042,442
Loans 90 Days Past Due and Accruing | 0 | 0 |
Non-Accrual Loans | 7,317 | 8,156 |
Residential Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 4,543 | 5,522 |
Current | 1,059,669 | 1,064,852 |
Total Loans Outstanding | 1,064,212 | 1,070,374 | 1,017,442
Loans 90 Days Past Due and Accruing | 0 | 0 |
Non-Accrual Loans | 3,499 | 4,096 |
Commercial Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 3,145 | 2,531 |
Current | 1,296,715 | 1,240,866 |
Total Loans Outstanding | 1,299,860 | 1,243,397 | 1,258,474
Loans 90 Days Past Due and Accruing | 0 | 0 |
Non-Accrual Loans | 646 | 1,122 |
Commercial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 2,305 | 965 |
Current | 442,525 | 420,143 |
Total Loans Outstanding | 444,830 | 421,108 | 390,982
Loans 90 Days Past Due and Accruing | 0 | 0 |
Non-Accrual Loans | 748 | 420 |
Home Equity |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 3,313 | 2,378 |
Current | 302,913 | 310,401 |
Total Loans Outstanding | 306,226 | 312,779 | 323,969
Loans 90 Days Past Due and Accruing | 0 | 0 |
Non-Accrual Loans | 2,098 | 2,130 |
Consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 94 | 162 |
Current | 24,283 | 25,610 |
Total Loans Outstanding | 24,377 | 25,772 | 20,733
Loans 90 Days Past Due and Accruing | 0 | 0 |
Non-Accrual Loans | 4 | 24 |
HPFC Portfolio Segment |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 417 | 531 |
Current | 17,840 | 21,062 |
Total Loans Outstanding | 18,257 | 21,593 | $ 30,842
Loans 90 Days Past Due and Accruing | 0 | 0 |
Non-Accrual Loans | 322 | 364 |
30-59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 5,519 | 3,901 |
30-59 Days Past Due | Residential Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,778 | 2,297 |
30-59 Days Past Due | Commercial Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,207 | 267 |
30-59 Days Past Due | Commercial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,315 | 548 |
30-59 Days Past Due | Home Equity |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,140 | 681 |
30-59 Days Past Due | Consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 58 | 108 |
30-59 Days Past Due | HPFC Portfolio Segment |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 21 | 0 |
60-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 2,773 | 2,859 |
60-89 Days Past Due | Residential Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 320 | 627 |
60-89 Days Past Due | Commercial Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,460 | 1,720 |
60-89 Days Past Due | Commercial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 388 | 0 |
60-89 Days Past Due | Home Equity |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 430 | 238 |
60-89 Days Past Due | Consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 31 | 31 |
60-89 Days Past Due | HPFC Portfolio Segment |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 144 | 243 |
Greater than 90 Days |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 5,525 | 5,329 |
Greater than 90 Days | Residential Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 2,445 | 2,598 |
Greater than 90 Days | Commercial Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 478 | 544 |
Greater than 90 Days | Commercial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 602 | 417 |
Greater than 90 Days | Home Equity |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,743 | 1,459 |
Greater than 90 Days | Consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 5 | 23 |
Greater than 90 Days | HPFC Portfolio Segment |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | $ 252 | $ 288 |

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