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LOANS AND CREDIT QUALITY (Class and Credit Indicator) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | $ 407,960 |  | $ 407,960 |  | $ 544,616
Fiscal year before current fiscal year | 556,414 |  | 556,414 |  | 350,371
Two years before current fiscal year | 346,697 |  | 346,697 |  | 804,301
Three years before current fiscal year | 715,203 |  | 715,203 |  | 1,006,482
Four years before current fiscal year | 949,449 |  | 949,449 |  | 569,739
Five years before current fiscal year | 1,730,090 |  | 1,730,090 |  | 1,335,637
Amortized Cost of Revolving Loans | 661,389 |  | 661,389 |  | 721,706
Loans | 5,367,202 |  | 5,367,202 |  | 5,332,852
Financing Receivable, Allowance For Credit Loss, Write Off, By Origination Year [Abstract] |  |  |  |  |
Year-to-date gross charge-offs, Current fiscal year |  |  | 179 | $ 144 |
Year-to-date gross charge-offs, fiscal year before current fiscal year |  |  | 3,026 | 668 |
Year-to-date gross charge-offs, two years before current fiscal year |  |  | 745 | 8,360 |
Year-to-date gross charge-offs, three years before current fiscal year |  |  | 5,609 | 3,446 |
Year-to-date gross charge-offs, four years before current fiscal year |  |  | 1,861 | 441 |
Year-to-date gross charge-offs, five years before current fiscal year |  |  | 1,754 | 2,327 |
Total | 3,895 | $ 4,718 | 13,174 | 15,386 |
Commercial and industrial |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 49,927 |  | 49,927 |  | 171,188
Fiscal year before current fiscal year | 185,213 |  | 185,213 |  | 59,015
Two years before current fiscal year | 42,925 |  | 42,925 |  | 70,498
Three years before current fiscal year | 60,834 |  | 60,834 |  | 59,904
Four years before current fiscal year | 51,550 |  | 51,550 |  | 21,827
Five years before current fiscal year | 120,158 |  | 120,158 |  | 142,628
Amortized Cost of Revolving Loans | 98,207 |  | 98,207 |  | 81,876
Loans | 608,814 |  | 608,814 |  | 606,936
Financing Receivable, Allowance For Credit Loss, Write Off, By Origination Year [Abstract] |  |  |  |  |
Year-to-date gross charge-offs, Current fiscal year |  |  | 74 | 69 |
Year-to-date gross charge-offs, fiscal year before current fiscal year |  |  | 2,152 | 150 |
Year-to-date gross charge-offs, two years before current fiscal year |  |  | 207 | 241 |
Year-to-date gross charge-offs, three years before current fiscal year |  |  | 876 | 203 |
Year-to-date gross charge-offs, four years before current fiscal year |  |  | 231 | 33 |
Year-to-date gross charge-offs, five years before current fiscal year |  |  | 969 | 1,168 |
Total | 1,071 | 663 | 4,509 | 1,864 |
Commercial and industrial | Special Mention |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 0 |  | 0 |  | 0
Fiscal year before current fiscal year | 0 |  | 0 |  | 0
Two years before current fiscal year | 1,076 |  | 1,076 |  | 0
Three years before current fiscal year | 0 |  | 0 |  | 2,539
Four years before current fiscal year | 0 |  | 0 |  | 0
Five years before current fiscal year | 0 |  | 0 |  | 0
Amortized Cost of Revolving Loans | 862 |  | 862 |  | 0
Loans | 1,938 |  | 1,938 |  | 2,539
Commercial and industrial | Substandard |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 0 |  | 0 |  | 3,372
Fiscal year before current fiscal year | 3,231 |  | 3,231 |  | 110
Two years before current fiscal year | 422 |  | 422 |  | 922
Three years before current fiscal year | 0 |  | 0 |  | 11
Four years before current fiscal year | 85 |  | 85 |  | 0
Five years before current fiscal year | 124 |  | 124 |  | 82
Amortized Cost of Revolving Loans | 10 |  | 10 |  | 0
Loans | 3,872 |  | 3,872 |  | 4,497
Commercial and industrial | Pass |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 49,927 |  | 49,927 |  | 167,816
Fiscal year before current fiscal year | 181,982 |  | 181,982 |  | 58,905
Two years before current fiscal year | 41,427 |  | 41,427 |  | 69,576
Three years before current fiscal year | 60,834 |  | 60,834 |  | 57,354
Four years before current fiscal year | 51,465 |  | 51,465 |  | 21,827
Five years before current fiscal year | 120,034 |  | 120,034 |  | 142,546
Amortized Cost of Revolving Loans | 97,335 |  | 97,335 |  | 81,876
Loans | 603,004 |  | 603,004 |  | 599,900
Real Estate Portfolio Segment [Member] | Construction |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 42,890 |  | 42,890 |  | 10,141
Fiscal year before current fiscal year | 19,092 |  | 19,092 |  | 33,646
Two years before current fiscal year | 51,045 |  | 51,045 |  | 35,398
Three years before current fiscal year | 45,923 |  | 45,923 |  | 19,217
Four years before current fiscal year | 17,814 |  | 17,814 |  | 11,754
Five years before current fiscal year | 40,846 |  | 40,846 |  | 34,937
Amortized Cost of Revolving Loans | 0 |  | 0 |  | 118
Loans | 217,610 |  | 217,610 |  | 145,211
Financing Receivable, Allowance For Credit Loss, Write Off, By Origination Year [Abstract] |  |  |  |  |
Total | 0 | 0 | 0 | 0 |
Real Estate Portfolio Segment [Member] | Construction | Pass |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 42,890 |  | 42,890 |  | 10,141
Fiscal year before current fiscal year | 19,092 |  | 19,092 |  | 33,646
Two years before current fiscal year | 51,045 |  | 51,045 |  | 35,398
Three years before current fiscal year | 45,923 |  | 45,923 |  | 19,217
Four years before current fiscal year | 17,814 |  | 17,814 |  | 11,754
Five years before current fiscal year | 40,846 |  | 40,846 |  | 34,937
Amortized Cost of Revolving Loans | 0 |  | 0 |  | 118
Loans | 217,610 |  | 217,610 |  | 145,211
Real Estate Portfolio Segment [Member] | Residential Mortgage |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 53,078 |  | 53,078 |  | 85,844
Fiscal year before current fiscal year | 77,955 |  | 77,955 |  | 89,118
Two years before current fiscal year | 83,911 |  | 83,911 |  | 261,115
Three years before current fiscal year | 242,804 |  | 242,804 |  | 589,734
Four years before current fiscal year | 566,634 |  | 566,634 |  | 395,488
Five years before current fiscal year | 815,153 |  | 815,153 |  | 471,221
Amortized Cost of Revolving Loans | 0 |  | 0 |  | 0
Loans | 1,839,535 |  | 1,839,535 |  | 1,892,520
Financing Receivable, Allowance For Credit Loss, Write Off, By Origination Year [Abstract] |  |  |  |  |
Year-to-date gross charge-offs, Current fiscal year |  |  |  | 0 |
Year-to-date gross charge-offs, fiscal year before current fiscal year |  |  |  | 0 |
Year-to-date gross charge-offs, two years before current fiscal year |  |  |  | 175 |
Year-to-date gross charge-offs, three years before current fiscal year |  |  |  | 0 |
Year-to-date gross charge-offs, four years before current fiscal year |  |  |  | 0 |
Year-to-date gross charge-offs, five years before current fiscal year |  |  |  | 208 |
Total | 0 | 99 | 0 | 383 |
Real Estate Portfolio Segment [Member] | Residential Mortgage | Substandard |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 0 |  | 0 |  | 0
Fiscal year before current fiscal year | 0 |  | 0 |  | 0
Two years before current fiscal year | 249 |  | 249 |  | 1,599
Three years before current fiscal year | 1,599 |  | 1,599 |  | 616
Four years before current fiscal year | 1,312 |  | 1,312 |  | 1,855
Five years before current fiscal year | 10,287 |  | 10,287 |  | 6,189
Amortized Cost of Revolving Loans | 0 |  | 0 |  | 0
Loans | 13,447 |  | 13,447 |  | 10,259
Real Estate Portfolio Segment [Member] | Residential Mortgage | Pass |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 53,078 |  | 53,078 |  | 85,844
Fiscal year before current fiscal year | 77,955 |  | 77,955 |  | 89,118
Two years before current fiscal year | 83,662 |  | 83,662 |  | 259,516
Three years before current fiscal year | 241,205 |  | 241,205 |  | 589,118
Four years before current fiscal year | 565,322 |  | 565,322 |  | 393,633
Five years before current fiscal year | 804,866 |  | 804,866 |  | 465,032
Amortized Cost of Revolving Loans | 0 |  | 0 |  | 0
Loans | 1,826,088 |  | 1,826,088 |  | 1,882,261
Real Estate Portfolio Segment [Member] | Home Equity |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 301 |  | 301 |  | 1,060
Fiscal year before current fiscal year | 997 |  | 997 |  | 11,787
Two years before current fiscal year | 12,248 |  | 12,248 |  | 28,687
Three years before current fiscal year | 25,737 |  | 25,737 |  | 18,277
Four years before current fiscal year | 16,986 |  | 16,986 |  | 8,406
Five years before current fiscal year | 33,113 |  | 33,113 |  | 26,266
Amortized Cost of Revolving Loans | 521,507 |  | 521,507 |  | 582,499
Loans | 610,889 |  | 610,889 |  | 676,982
Financing Receivable, Allowance For Credit Loss, Write Off, By Origination Year [Abstract] |  |  |  |  |
Total | 0 | 0 | 0 | 0 |
Real Estate Portfolio Segment [Member] | Home Equity | Substandard |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 0 |  | 0 |  | 0
Fiscal year before current fiscal year | 0 |  | 0 |  | 0
Two years before current fiscal year | 1,185 |  | 1,185 |  | 0
Three years before current fiscal year | 0 |  | 0 |  | 0
Four years before current fiscal year | 0 |  | 0 |  | 0
Five years before current fiscal year | 934 |  | 934 |  | 1,031
Amortized Cost of Revolving Loans | 0 |  | 0 |  | 0
Loans | 2,119 |  | 2,119 |  | 1,031
Real Estate Portfolio Segment [Member] | Home Equity | Pass |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 301 |  | 301 |  | 1,060
Fiscal year before current fiscal year | 997 |  | 997 |  | 11,787
Two years before current fiscal year | 11,063 |  | 11,063 |  | 28,687
Three years before current fiscal year | 25,737 |  | 25,737 |  | 18,277
Four years before current fiscal year | 16,986 |  | 16,986 |  | 8,406
Five years before current fiscal year | 32,179 |  | 32,179 |  | 25,235
Amortized Cost of Revolving Loans | 521,507 |  | 521,507 |  | 582,499
Loans | 608,770 |  | 608,770 |  | 675,951
Real Estate Portfolio Segment [Member] | Commercial Mortgage |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 188,748 |  | 188,748 |  | 180,391
Fiscal year before current fiscal year | 179,099 |  | 179,099 |  | 95,944
Two years before current fiscal year | 95,201 |  | 95,201 |  | 235,344
Three years before current fiscal year | 227,427 |  | 227,427 |  | 226,230
Four years before current fiscal year | 217,385 |  | 217,385 |  | 111,399
Five years before current fiscal year | 699,456 |  | 699,456 |  | 645,641
Amortized Cost of Revolving Loans | 5,871 |  | 5,871 |  | 5,731
Loans | 1,613,187 |  | 1,613,187 |  | 1,500,680
Financing Receivable, Allowance For Credit Loss, Write Off, By Origination Year [Abstract] |  |  |  |  |
Total | 0 | 0 | 0 | 0 |
Real Estate Portfolio Segment [Member] | Commercial Mortgage | Special Mention |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 0 |  | 0 |  | 0
Fiscal year before current fiscal year | 0 |  | 0 |  | 621
Two years before current fiscal year | 617 |  | 617 |  | 0
Three years before current fiscal year | 30,000 |  | 30,000 |  | 2,506
Four years before current fiscal year | 0 |  | 0 |  | 0
Five years before current fiscal year | 475 |  | 475 |  | 2,930
Amortized Cost of Revolving Loans | 0 |  | 0 |  | 0
Loans | 31,092 |  | 31,092 |  | 6,057
Real Estate Portfolio Segment [Member] | Commercial Mortgage | Substandard |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 0 |  | 0 |  | 0
Fiscal year before current fiscal year | 33,231 |  | 33,231 |  | 0
Two years before current fiscal year | 0 |  | 0 |  | 0
Three years before current fiscal year | 0 |  | 0 |  | 0
Four years before current fiscal year | 1,390 |  | 1,390 |  | 0
Five years before current fiscal year | 7,247 |  | 7,247 |  | 7,456
Amortized Cost of Revolving Loans | 0 |  | 0 |  | 0
Loans | 41,868 |  | 41,868 |  | 7,456
Real Estate Portfolio Segment [Member] | Commercial Mortgage | Pass |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 188,748 |  | 188,748 |  | 180,391
Fiscal year before current fiscal year | 145,868 |  | 145,868 |  | 95,323
Two years before current fiscal year | 94,584 |  | 94,584 |  | 235,344
Three years before current fiscal year | 197,427 |  | 197,427 |  | 223,724
Four years before current fiscal year | 215,995 |  | 215,995 |  | 111,399
Five years before current fiscal year | 691,734 |  | 691,734 |  | 635,255
Amortized Cost of Revolving Loans | 5,871 |  | 5,871 |  | 5,731
Loans | 1,540,227 |  | 1,540,227 |  | 1,487,167
Consumer |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 73,016 |  | 73,016 |  | 95,992
Fiscal year before current fiscal year | 94,058 |  | 94,058 |  | 60,861
Two years before current fiscal year | 61,367 |  | 61,367 |  | 173,259
Three years before current fiscal year | 112,478 |  | 112,478 |  | 93,120
Four years before current fiscal year | 79,080 |  | 79,080 |  | 20,865
Five years before current fiscal year | 21,364 |  | 21,364 |  | 14,944
Amortized Cost of Revolving Loans | 35,804 |  | 35,804 |  | 51,482
Loans | 477,167 |  | 477,167 |  | 510,523
Financing Receivable, Allowance For Credit Loss, Write Off, By Origination Year [Abstract] |  |  |  |  |
Year-to-date gross charge-offs, Current fiscal year |  |  | 105 | 75 |
Year-to-date gross charge-offs, fiscal year before current fiscal year |  |  | 874 | 518 |
Year-to-date gross charge-offs, two years before current fiscal year |  |  | 538 | 7,944 |
Year-to-date gross charge-offs, three years before current fiscal year |  |  | 4,733 | 3,243 |
Year-to-date gross charge-offs, four years before current fiscal year |  |  | 1,630 | 408 |
Year-to-date gross charge-offs, five years before current fiscal year |  |  | 785 | 951 |
Total | 2,824 | $ 3,956 | 8,665 | $ 13,139 |
Consumer | Substandard |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 63 |  | 63 |  | 21
Fiscal year before current fiscal year | 35 |  | 35 |  | 90
Two years before current fiscal year | 79 |  | 79 |  | 162
Three years before current fiscal year | 109 |  | 109 |  | 144
Four years before current fiscal year | 72 |  | 72 |  | 27
Five years before current fiscal year | 421 |  | 421 |  | 478
Amortized Cost of Revolving Loans | 0 |  | 0 |  | 60
Loans | 779 |  | 779 |  | 982
Consumer | Pass |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Current fiscal year | 72,953 |  | 72,953 |  | 95,971
Fiscal year before current fiscal year | 94,023 |  | 94,023 |  | 60,771
Two years before current fiscal year | 61,288 |  | 61,288 |  | 173,097
Three years before current fiscal year | 112,369 |  | 112,369 |  | 92,976
Four years before current fiscal year | 79,008 |  | 79,008 |  | 20,838
Five years before current fiscal year | 20,943 |  | 20,943 |  | 14,466
Amortized Cost of Revolving Loans | 35,804 |  | 35,804 |  | 51,422
Loans | $ 476,388 |  | $ 476,388 |  | $ 509,541

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