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LOANS AND ALLOWANCE FOR CREDIT LOSSES ON LOANS (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Proceeds from the sale of mortgage loans |  |  |  | $ 95,804 | $ 71,780 |  |  |
Gain on sale of mortgage loans |  |  |  | (848) | (761) |  |  |
Loans held for sale, at fair value (book value of $14,162 and $10,152, respectively) | $ 14,321 |  |  | 14,321 |  | $ 10,320 |  |
Allowance for credit losses | 35,412 | $ 35,613 | $ 36,983 | 35,412 | 36,983 | 36,935 | $ 37,134 | $ 36,922
(Credit) provision for loan losses | 188 |  | 305 | $ (976) | 744 | 1,174 |  |
Other industry exposures |  |  |  | 0 |  |  |  |
Non-Accrual Loans | 7,795 |  |  | $ 7,795 |  | 5,448 |  |
Loans outstanding | 4,139,361 |  |  | 4,139,361 |  | 4,098,094 |  |
Interest lost on nonaccrual loans | 61 |  | 24 | 104 | 50 |  |  |
Loans and Leases Receivable, Excluded Accrued Interest from Amortized Cost | 13,700 |  |  | 13,700 |  | 12,700 |  |
FHLB advances, general debt obligations, pledged collateral | 1,900,000 |  |  | 1,900,000 |  |  |  |
Residential real estate |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Gross loans | 1,768,357 |  |  | 1,768,357 |  | 1,763,378 |  |
Proceeds from the sale of mortgage loans | 53,500 |  | 36,000 | 95,000 | 71,100 |  |  |
Gain on sale of mortgage loans | (378) |  | (377) | (848) | (761) |  |  |
Loans held for sale, at fair value (book value of $14,162 and $10,152, respectively) | 14,200 |  |  | 14,200 |  | 10,200 |  |
Unrealized gain (loss) on loans held for sale |  | 168 |  | 159 |  |  |  |
Allowance for Loan and Lease Losses, Period Increase (Decrease) | 76 |  | (65) | 9 | 20 |  |  |
Allowance for credit losses | 9,571 | 10,565 | 10,627 | 9,571 | 10,627 | 10,254 | 10,812 | 9,089
(Credit) provision for loan losses | (1,001) |  | (214) | (696) | 1,523 | 1,139 |  |
Non-Accrual Loans | 2,497 |  |  | 2,497 |  | 2,541 |  |
Loans outstanding | 1,768,357 |  |  | 1,768,357 |  | 1,763,378 |  |
Mortgage Loans in Process of Foreclosure, Amount | 274 |  |  | 274 |  | 1,100 |  |
Commercial real estate - non-owner-occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Gross loans | 1,395,713 |  |  | 1,395,713 |  | 1,370,446 |  |
Allowance for credit losses | 15,268 | 15,294 | 16,155 | 15,268 | 16,155 | 16,581 | 16,324 | 17,296
(Credit) provision for loan losses | (27) |  | (170) | (1,321) | (1,143) | (734) |  |
Non-Accrual Loans | 79 |  |  | 79 |  | 261 |  |
Loans outstanding | 1,395,713 |  |  | 1,395,713 |  | 1,370,446 |  |
Commercial |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Gross loans | 409,682 |  |  | 409,682 |  | 403,901 |  |
Allowance for credit losses | 5,407 | 4,460 | 4,795 | 5,407 | 4,795 | 4,869 | 4,581 | 5,446
(Credit) provision for loan losses | 1,331 |  | 684 | 1,139 | 32 | 512 |  |
Non-Accrual Loans | 4,409 |  |  | 4,409 |  | 1,725 |  |
Loans outstanding | 409,682 |  |  | 409,682 |  | 403,901 |  |
Home equity |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Gross loans | 246,810 |  |  | 246,810 |  | 240,341 |  |
Allowance for credit losses | 2,311 | 2,360 | 2,397 | 2,311 | 2,397 | 2,217 | 2,440 | 2,225
(Credit) provision for loan losses | (50) |  | (43) | 13 | 172 | (9) |  |
Non-Accrual Loans | 805 |  |  | 805 |  | 759 |  |
Loans outstanding | 246,810 |  |  | 246,810 |  | 240,341 |  |
Consumer |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Gross loans | 16,533 |  |  | 16,533 |  | 18,168 |  |
Allowance for credit losses | 689 | $ 704 | 658 | 689 | 658 | 724 | $ 507 | $ 504
(Credit) provision for loan losses | (1) |  | $ 167 | 13 | $ 171 | 280 |  |
Non-Accrual Loans | 5 |  |  | 5 |  | 37 |  |
Loans outstanding | 16,533 |  |  | 16,533 |  | 18,168 |  |
Commercial |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Gross loans | 409,682 |  |  | 409,682 |  | 403,901 |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 51,056 |  |  | 51,056 |  | 42,164 |  |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 37,304 |  |  | 37,304 |  | 54,911 |  |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 49,821 |  |  | $ 49,821 |  | 56,550 |  |
Non-Residential Building Operators Industry Sector | Loan Concentration Risk | Total Loan Portfolio |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Concentration risk (percentage) |  |  |  | 13.00% |  |  |  |
Non-Residential Building Operators Industry Sector | Loan Concentration Risk | Commercial Real Estate |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Concentration risk (percentage) |  |  |  | 32.00% |  |  |  |
Residential Building Operators Industry Sector | Loan Concentration Risk | Total Loan Portfolio |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Concentration risk (percentage) |  |  |  | 12.00% |  |  |  |
Residential Building Operators Industry Sector | Loan Concentration Risk | Commercial Real Estate |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Concentration risk (percentage) |  |  |  | 28.00% |  |  |  |
Substandard [Member] | Commercial |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Gross loans | 8,541 |  |  | $ 8,541 |  | 9,033 |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 0 |  |  | 0 |  | 248 |  |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 1,070 |  |  | 1,070 |  | 588 |  |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 275 |  |  | 275 |  | 296 |  |
Pass [Member] | Commercial |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Gross loans | 400,692 |  |  | 400,692 |  | 393,710 |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 51,056 |  |  | 51,056 |  | 41,871 |  |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 36,182 |  |  | 36,182 |  | 54,323 |  |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | $ 49,476 |  |  | $ 49,476 |  | $ 56,102 |  |

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