| INCOME TAXES (Tables) | 12 Months Ended | 
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| Dec. 31, 2023 | |
| Income Tax [Abstract] | |
| Schedule of Provision for Income Taxes | (Dollars in Thousands)  2023  2022  2021  Current:  Federal  $  11,630 $  10,646 $  12,039 State  1,893 1,022 1,044 13,523 11,668 13,083 Deferred:  Federal  (391) (2,994) (3,246) State  (351) (899) (10) Change in Valuation 259 23 8 (483) (3,870) (3,248) Total:  Federal  11,239 7,652 8,793 State  1,542 123 1,034 Change in Valuation 259 23 8 Total  $  13,040 $  7,798 $  9,835 | 
| Schedule of Effective Income Tax Rate Reconciliation | (Dollars in Thousands)  2023  2022  2021  Tax Expense at Federal $  13,411 $  8,625 $  10,385 Increases (Decreases) Resulting From:  Tax-Exempt Interest (259) (248) (271) State Taxes, Net of Federal 1,218 94 819 Other  (1,695) (546) 375 Change in Valuation 259 23 8 Tax-Exempt Cash Surrender (187) (175) (173) Noncontrolling Interest  293 25 (1,308) Actual Tax Expense  $  13,040 $  7,798 $  9,835 | 
| Schedule of Deferred Income Tax Liabilities and Assets | (Dollars in Thousands)  2023  2022  Deferred Tax Assets Attributable Allowance for Credit Losses  $  7,236 $  6,042 Accrued Pension/SERP  144 1,530 State Net Operating Loss and Tax 2,069 1,920 Other Real Estate Owned  887 917 Accrued SERP Liability  2,594 3,246 Lease Liability  5,911 4,547 Net Unrealized Losses on Investment Securities  8,601 12,499 Other  2,665 3,043 Investment in Partnership  3,241 1,544 Total Deferred $  33,348 $  35,288 Deferred Tax Liabilities Depreciation on Premises and Equipment  $  3,733 $  3,382 Deferred Loan Fees and Costs  2,614 2,372 Intangible Assets  3,344 3,310 Accrued Pension Liability  1,688 1,043 Right of Use Asset  5,829 4,474 Investments  469 469 Other  1,851 2,099 Total Deferred 19,528 17,149 Valuation 1,930 1,671 Net Deferred Tax $  11,890 $  16,468 | 
| Schedule of Beginning and Ending Unrecognized Tax Benefit | (Dollars in Thousands)  2023  2022  2021  Balance at January 1,  $  136 $  52 $  - Additions Based on Tax 97 84 52 Balance at December 31  $  233 $  136 $  52 | 
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- References No definition available. 
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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Tabular disclosure of the change in unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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