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LOANS - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) Contract | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Loans held for sale, at lower of cost or fair value | $ 15,626,000 | $ 34,051,000 |
Gain (loss) on loans held for sale at lower of cost or fair value |  | 1,142,000 | $ 7,426,000
Loan receivable, validate risk ratings performed for large sample or new lending to existing relationships | 1,000,000 |  |
Loan receivable, validate risk ratings performed for criticized and classified rated borrowers with relationship exposure, value | 500,000 |  |
Loan receivable, validate risk ratings performed for new regulation "O" loan commitments, value | 1,000,000 |  |
Loan receivable validate risk ratings performed for leveraged loans, value | 1,000,000 |  |
Loan receivable validate risk ratings performed for no borrower with commitments, value | 500,000 |  |
Loan modifications | 947,000,000.0 |  |
Troubled debt restructurings specific reserves to customers | $ 1,200,000 | 0 |
Deferral [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Bank modified loans and contracts | Contract | 542 |  |
Substandard [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Financing receivable individually evaluated loan | $ 14,700,000 | 15,700,000 |
Minimum [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Loan receivable, validate risk ratings performed for large sample of borrowers with relationship, value | 1,000,000 |  |
Maximum [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Loan receivable, validate risk ratings performed for small sample of borrowers with relationship, value | $ 1,000,000 |  |
Potential Problem Loans |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Loans held for sale, at lower of cost or fair value |  | 6,700,000 |
Gain (loss) on loans held for sale at lower of cost or fair value |  | 282,000 |
Residential Mortgage [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Loans held for sale, at lower of cost or fair value |  | 12,200,000 |
Gain (loss) on loans held for sale at lower of cost or fair value |  | 362,000 |
Paycheck Protection Program [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Loans held for sale, at lower of cost or fair value |  | 56,500,000 | 355,000,000.0
Gain (loss) on loans held for sale at lower of cost or fair value |  | $ 1,100,000 | $ 7,400,000

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- Definition Loan receivable validate risk ratings performed for no borrower with commitments, value. + References No definition available. + Details
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