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LOANS AND LEASES - Additional Information (Details) | 3 Months Ended | 12 Months Ended
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Mar. 31, 2022 USD ($) Contract Loan | Mar. 31, 2021 Contract | Dec. 31, 2021 USD ($)
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
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 | $ 2,500,000 |  | $ 0
Number of Loans | 1 | 0 |
Deferral [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Bank modified loans and contracts | Contract | 542 |  |
Number of Loans | Loan | 4 |  |
Substandard [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Financing receivable individually evaluated loan | $ 15,900,000 |  | $ 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 |  |

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- Definition Amount of investment in specific reserve accrual financing receivables (after modification) modified by troubled debt restructurings. + References No definition available. + Details
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- Definition Financing receivable substandard and individually evaluated loan. + References No definition available. + Details
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- Definition Loan receivable, validate risk ratings performed for criticized and classified rated borrowers with relationship exposure, value. + References No definition available. + Details
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- Definition Loan receivable, validate risk ratings performed for large sample of borrowers with relationship, value. + References No definition available. + Details
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- Definition Loan receivable, validate risk ratings performed for large sample or new lending to existing relationships, value. + References No definition available. + Details
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- Definition Loan receivable validate risk ratings performed for leveraged loans, value. + References No definition available. + Details
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- Definition Loan receivable, validate risk ratings performed for new regulation loan commitments, value. + References No definition available. + Details
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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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- Definition Loan receivable, validate risk ratings performed for Small sample of borrowers with relationship, value. + References No definition available. + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of financing receivable modified on trial basis. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
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- Details
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