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LONG-TERM DEBT - Narrative (Details) - USD ($) $ in Thousands | Jan. 19, 2022 | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Outstanding balance, subordinated notes |  | $ 224,227 | $ 126,026
Subordinated Debt |  |  |
Debt Instrument [Line Items] |  |  |
Outstanding balance, subordinated notes |  | 62,000 |
3.5% Subordinated Notes Due 2032 | Subordinated Debt |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate (percent) | 0.035% |  |
Basis spread on variable rate | 2.15% |  |
Outstanding balance, subordinated notes |  | $ 98,000 |
Senior Notes 6.50% Due 2026 | Senior Notes |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate (percent) |  | 6.50% | 6.50%
Outstanding balance, subordinated notes |  | $ 64,000 | $ 64,000
Home Street Statutory Trust Subordinated Debt Securities | Subordinated Debt |  |  |
Debt Instrument [Line Items] |  |  |
Outstanding balance, subordinated notes |  |  | $ 62,000

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