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LOANS AND ALLOWANCE FOR CREDIT LOSSES ON LOANS (Narrative) (Details) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2023 USD ($) loan | Mar. 31, 2023 USD ($) | Sep. 30, 2022 USD ($) | Jun. 30, 2023 USD ($) loan | Sep. 30, 2023 USD ($) loan | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) loan | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
SBA PPP Loans, Originations, Number of Contracts Outstanding | loan | 4 |  |  |  | 4 |  | 5 |  |
Loans and Leases Receivable, Related Parties, Description |  |  |  | At September 30, 2023 and December 31, 2022, outstanding loans to certain officers, directors and their associated companies were less than 5% of the Company's shareholders' equity. | At September 30, 2023 and December 31, 2022, outstanding loans to certain officers, directors and their associated companies were less than 5% of the Company's shareholders' equity. |  |  |  |
Proceeds from the sale of mortgage loans |  |  |  |  | $ 138,429 | $ 134,597 |  |  |
Gain on sale of mortgage loans |  |  |  |  | (1,191) | (2,948) |  |  |
Loans held for sale, at fair value (book value of $11,299 and $5,259, respectively) | $ 11,187 |  |  |  | 11,187 |  | $ 5,197 |  |
Allowance for Loan and Lease Losses, Period Increase (Decrease) |  |  |  |  | 515 |  |  |  |
Allowance for credit losses | 36,407 |  | $ 36,542 | $ 36,983 | 36,407 | 36,542 | 36,922 | $ 34,244 | $ 33,256
Provision (credit) for loan losses | (456) |  | 2,513 |  | $ 288 | 3,788 | 4,430 |  |
Other industry exposures |  |  |  |  | 0 |  |  |  |
Non-Accrual Loans | 4,624 |  |  |  | $ 4,624 |  | 2,991 |  |
Loans outstanding | 4,058,413 |  |  |  | 4,058,413 |  | 4,010,353 |  |
Interest lost on nonaccrual loans | 34 |  | 30 |  | 84 | 115 |  |  |
Loans and Leases Receivable, Excluded Accrued Interest from Amortized Cost | 11,600 |  |  |  | 11,600 |  | 8,900 |  |
Recorded Investment |  |  |  |  |  |  | 2,566 |  |
Loans modified | loan |  |  |  | 0 |  |  |  |  |
FHLB advances, general debt obligations, pledged collateral | 1,900,000 |  |  |  | 1,900,000 |  | 1,800,000 |  |
Residential real estate |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Gross loans | 1,752,401 |  |  |  | 1,752,401 |  | 1,700,266 |  |
Allowance for Loan and Lease Losses, Period Increase (Decrease) |  |  |  |  | $ 954 |  |  |  |
Loan Portfolio Increase (Decrease), Percentage |  |  |  |  | 3.00% |  |  |  |
Allowance for credit losses | 10,042 |  | 9,085 | $ 10,627 | $ 10,042 | 9,085 | 9,089 | 8,438 | 6,133
Provision (credit) for loan losses | (590) |  | 696 |  | 933 | 3,017 | 3,022 |  |
Non-Accrual Loans | 2,775 |  |  |  | 2,775 |  | 1,733 |  |
Loans outstanding | 1,752,401 |  |  |  | 1,752,401 |  | 1,700,266 |  |
Mortgage Loans in Process of Foreclosure, Amount | 135 |  |  |  | 135 |  | 481 |  |
Commercial real estate - non-owner-occupied |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Gross loans | 1,349,463 |  |  |  | 1,349,463 |  | 1,292,443 |  |
Allowance for Loan and Lease Losses, Period Increase (Decrease) |  |  |  |  | (1,500) |  |  |  |
Allowance for credit losses | 16,779 |  | 17,133 | 16,155 | 16,779 | 17,133 | 17,296 | 16,210 | 18,834
Provision (credit) for loan losses | 607 |  | 922 |  | (536) | (1,703) | (1,541) |  |
Non-Accrual Loans | 92 |  |  |  | 92 |  | 11 |  |
Loans outstanding | 1,349,463 |  |  |  | 1,349,463 |  | 1,292,443 |  |
Commercial |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Gross loans | 400,031 |  |  |  | 400,031 |  | 430,131 |  |
Allowance for credit losses | 4,482 |  | 5,216 | 4,795 | 4,482 | 5,216 | 5,446 | 5,146 | 4,202
Provision (credit) for loan losses | (247) |  | 192 |  | (215) | 1,417 | 1,907 |  |
Non-Accrual Loans | 1,083 |  |  |  | 1,083 |  | 715 |  |
Loans outstanding | 400,031 |  |  |  | 400,031 |  | 430,131 |  |
Home equity |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Gross loans | 233,452 |  |  |  | 233,452 |  | 234,428 |  |
Allowance for credit losses | 2,297 |  | 1,860 | 2,397 | 2,297 | 1,860 | 2,225 | 1,796 | 1,469
Provision (credit) for loan losses | (101) |  | 63 |  | 71 | 304 | 669 |  |
Non-Accrual Loans | 633 |  |  |  | 633 |  | 486 |  |
Loans outstanding | 233,452 |  |  |  | 233,452 |  | 234,428 |  |
Consumer |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Gross loans | 19,241 |  |  |  | 19,241 |  | 20,591 |  |
Allowance for credit losses | 645 |  | 601 | $ 658 | 645 | 601 | 504 | $ 153 | $ 79
Provision (credit) for loan losses | 6 |  | 494 |  | 177 | 647 | 552 |  |
Non-Accrual Loans | 41 |  |  |  | 41 |  | 0 |  |
Loans outstanding | 19,241 |  |  |  | 19,241 |  | 20,591 |  |
Fixed Rate Residential Mortgage |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from the sale of mortgage loans | 66,200 |  | 37,900 |  | 137,200 | 131,600 |  |  |
Gain on sale of mortgage loans | (429) |  | (783) |  | (1,200) | (2,900) |  |  |
Loans held for sale, at fair value (book value of $11,299 and $5,259, respectively) | 11,300 |  |  |  | 11,300 |  | 5,300 |  |
Commercial |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Gross loans | 400,031 |  |  |  | 400,031 |  | 430,131 |  |
Recorded Investment |  |  |  |  |  |  | 0 |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 25,523 |  |  |  | 25,523 |  | 73,686 |  |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 58,270 |  |  |  | 58,270 |  | 70,162 |  |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 59,966 |  |  |  | 59,966 |  | 32,498 |  |
SBA PPP Portfolio |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Gross loans | 425 |  |  |  | 425 |  | 648 |  |
Nonoperating Income (Expense) | Fixed Rate Residential Mortgage |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Gain on sale of mortgage loans | 69 |  | $ 193 |  | $ 49 | $ 262 |  |  |
Unrealized gain (loss) on loans held for sale | 112 | $ 62 |  |  |  |  |  |  |
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) |  |  |  |  | 33.00% |  |  |  |
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 | 6,349 |  |  |  | $ 6,349 |  | 5,156 |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 265 |  |  |  | 265 |  | 149 |  |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 427 |  |  |  | 427 |  | 52 |  |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 310 |  |  |  | 310 |  | 133 |  |
Pass [Member] | Commercial |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Gross loans | 390,106 |  |  |  | 390,106 |  | 423,274 |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 25,211 |  |  |  | 25,211 |  | 73,537 |  |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 57,843 |  |  |  | 57,843 |  | 70,110 |  |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | $ 59,490 |  |  |  | $ 59,490 |  | 32,272 |  |
Performing Financial Instruments [Member] | Loans |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |  | 2,100 |  |
Nonperforming Financial Instruments [Member] | Loans |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |  | $ 452 |  |

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- Definition Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 35 -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-35 + Details
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