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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) segment branchOffice county shares | Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) $ / shares shares
Summary Of Significant Accounting Policies [Line Items] |  |  |
Number of branch offices | branchOffice | 52 |  |
Number of counties where branch offices are located | county | 15 |  |
Investment loans excluding accrued interest | $ 18,400,000 | $ 10,000,000 |
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Interest Receivable | Interest Receivable |
Threshold for loans individually analyzed for impairment | $ 250,000 |  |
Investment in limited partnerships | 12,200,000 | $ 9,400,000 |
Commitment to fund limited partnerships | 3,900,000 | 2,200,000 |
Balance of real estate owned | 100,000 | 196,000 |
Loan servicing fees | $ 1,200,000 | $ 1,200,000 | $ 1,200,000
Contractually Specified Servicing Fee Income, Statement of Income or Comprehensive Income [Extensible Enumeration] | Mortgage banking income | Mortgage banking income | Mortgage banking income
Mortgage servicing rights | $ 2,700,000 | $ 2,400,000 |
Unpaid principal balances | 364,300,000 | 375,400,000 |
Escrow deposit | 1,700,000 | 1,700,000 |
Bank owned life insurance | 108,407,000 | 97,652,000 |
Goodwill, Impaired, Accumulated Impairment Loss | $ 0 | $ 0 | $ 0
Treasury stock (in shares) | shares | 475,902 | 476,816 |
Shares purchased under director deferred compensation plan included in treasury stock (in shares) | shares | 186,801 | 187,715 |
Repurchased common shares (in shares) | shares |  |  | 289,101
Weighted average price (in USD per share) | $ / shares |  |  | $ 34.63
Number of reportable operating segments | segment | 1 |  |
Interest Rate Swap |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Notional amount | $ 760,500,000 | $ 796,000,000.0 |
Fair value of interest rate swap asset | 36,900,000 | 14,300,000 |
Fair value of interest rate swap liability | 36,900,000 | 14,300,000 |
Amount of risk participation transactions | 0 | 4,600,000 |
Life Insurance | Officer |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Bank owned life insurance | 102,500,000 | 91,100,000 |
Deferred Compensation | Officer |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Bank owned life insurance | $ 5,900,000 | $ 6,600,000 |
Premises and Improvements | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Useful life | 5 years |  |
Premises and Improvements | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Useful life | 40 years |  |
Furniture Assets | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Useful life | 3 years |  |
Furniture Assets | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Useful life | 7 years |  |

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- Definition Number Of Counties Where Branch Offices Are Located + References No definition available. + Details
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- Definition The carrying amount of a life insurance policy on an officer, executive or employee for which the reporting entity (a bank) is entitled to proceeds from the policy upon death of the insured or surrender of the insurance policy. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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- Definition Indicates line item in statement of income or comprehensive income that includes contractually specified servicing fee income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122596-111746 + Details
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- Definition All amounts that, per contract, are due to the servicer in exchange for servicing the financial asset and would no longer be received by a servicer if the beneficial owners of the serviced assets (or their trustees or agents) were to exercise their actual or potential authority under the contract to shift the servicing to another servicer. Depending on the servicing contract, those fees may include some or all of the difference between the interest rate collected on the asset being serviced and the rate to be paid to the beneficial owners of the asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122596-111746 + Details
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- Definition The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 440 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=6491277&loc=d3e6429-115629 + Details
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- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 55 -Paragraph 24 -URI https://asc.fasb.org/extlink&oid=122137925&loc=d3e14258-109268 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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- Definition Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets. + References No definition available. + Details
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- Definition Amount of investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29(Column G)) -URI https://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014 + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8672-108599 + Details
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