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NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2022 USD ($) segment | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Number of reportable segments | segment | 1 |  |  |
Contractual performance period of nonaccrual loans to be restored to accrual status | 6 months |  |  |
Minimum period past due to charge off loans | 120 days |  |  |
Number of distinct segments in loan portfolio | segment | 3 |  |  |
Credit losses related to unfunded loan commitments | $ 16,615,000 | $ 13,537,000 | $ 11,385,000 | $ 9,836,000
Threshold amount of estimate loss for evaluating individual loans for impairment | 100,000 |  |  |
Accrued interest related to unrecognized tax benefits | 0 |  |  |
Fair value of trust assets under management | $ 1,063,615,000 |  | 1,232,919,000 |
Trust revenue is earned and collected monthly | 83.00% |  |  |
Commercial |  |  |  |
Credit losses related to unfunded loan commitments | $ 11,298,000 | 8,293,000 | 6,308,000 | 4,788,000
Commercial | Maximum |  |  |  |
Threshold amount of loan balance for evaluating individual impairment loss | 200,000 |  |  |
Residential mortgage |  |  |  |
Credit losses related to unfunded loan commitments | 4,073,000 | 4,338,000 | 4,253,000 | 4,182,000
Residential mortgage | Maximum |  |  |  |
Threshold amount of loan balance for evaluating individual impairment loss | 400,000 |  |  |
Consumer |  |  |  |
Credit losses related to unfunded loan commitments | 244,000 | 235,000 | $ 239,000 | $ 281,000
Consumer | Maximum |  |  |  |
Threshold amount of loan balance for evaluating individual impairment loss | 400,000 |  |  |
Unfunded Loan Commitment |  |  |  |
Credit losses related to unfunded loan commitments | $ 0 | $ 0 |  |

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- Definition The amount of estimated loss on a financing receivable with relationships less than $200,000 in the aggregate which will trigger that financing receivable to be individually evaluated for impairment. + References No definition available. + Details
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- Definition Threshold for determining if a financing receivable with an estimated loss of $100,000 or more, will be individually evaluated for impairment. + References No definition available. + Details
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- Definition Minimum loan period past due on a contractual basis to be generally charged off, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Period of contractual performance of nonaccrual loans restored to accrual status, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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