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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Non Traditional Mortgage Loans Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 7,115,038 | $ 7,251,480
Consumer: |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 7,115,038 |
Loans And Finance Receivables, Non-Traditional Mortgages | Loan Portfolio | Loan Portfolio Concentration Risk |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage to total loans and leases (percent) | 12.10% | 8.80%
Loans And Finance Receivables, Non-Traditional Mortgages | Consumer: |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 862,300 | $ 635,300
Loans And Finance Receivables, Non-Traditional Mortgages | Consumer: | Nonperforming |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 3,000 | $ 4,000
Weighted average LTV (percent) | 59.00% |
Loans And Finance Receivables, Non-Traditional Mortgages | Consumer: | Interest Only | Minimum |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loan term (in years) | 30 years |
Mortgage loan, flexible initial term (in years) | 1 year |
Loans And Finance Receivables, Non-Traditional Mortgages | Consumer: | Interest Only | Maximum |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loan term (in years) | 40 years |
Mortgage loan, flexible initial term (in years) | 10 years |

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