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LOANS AND CREDIT QUALITY - Narrative (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) loan portfolioSegment | Dec. 31, 2020 USD ($)
Financing Receivable, Impaired [Line Items] |  |
Number of portfolio segments | portfolioSegment | 2 |
Allowance for unfunded commitments | $ 2.4 | $ 1.6
Accrued interest receivable | $ 17.8 | $ 21.2
Number of days past due on re-default consumer loans | 60 days |
Number of days past due on re-default commercial loans | 90 days |
CARES Act, Section 4013 Temporary Relief |  |
Financing Receivable, Impaired [Line Items] |  |
Loans granted forbearance, outstanding balance | $ 28.0 |
Number of loans granted forbearance | loan | 41 |
California | Residential Mortgage and Multifamily |  |
Financing Receivable, Impaired [Line Items] |  |
Percentage of loan portfolio | 33.00% | 19.00%
Federal Home Loan Bank Advances |  |
Financing Receivable, Impaired [Line Items] |  |
Loans pledged as collateral | $ 2,800.0 | $ 1,400.0
Federal Reserve Bank Advances |  |
Financing Receivable, Impaired [Line Items] |  |
Loans pledged as collateral | $ 419.0 | $ 569.0

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