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JUNIOR SUBORDINATED DEBENTURES AND MANDATORILY REDEEMABLE TRUST PREFERRED SECURITIES (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 USD ($) subsidiary | Dec. 31, 2023 USD ($) | Jun. 30, 2020 USD ($)
Schedule of Trust Preferred Securities [Line Items] |  |  |
Number of wholly-owned Grantor Trusts | subsidiary | 5 |  |
Grantor trusts amount of tier one risk based capital | $ 1,760,065 | $ 1,650,872 |
Junior Subordinated Debt [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Interest Rate Spread | 48.90% |  |
Long-term Debt, Gross |  |  | $ 100,000
Debt Instrument, Interest Rate, Stated Percentage | 5.00% |  |
Balance outstanding |  |  | $ 98,100
Subordinated Borrowing, Interest Rate | 5.00% |  |
Aggregate Liquidation Amount of Trust Preferred Securities [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | $ 86,500 |  |
Aggregate Liquidation Amount of Trust Preferred Securities [Member] | Banner Capital Trust V [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | 25,000 |  |
Aggregate Liquidation Amount of Trust Preferred Securities [Member] | Banner Capital Trust VI [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | 25,000 |  |
Aggregate Liquidation Amount of Trust Preferred Securities [Member] | Banner Capital Trust VII [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | 25,000 |  |
Aggregate Liquidation Amount of Trust Preferred Securities [Member] | Greater Sacramento Bancorp Statutory Trust Two [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | 4,000 |  |
Aggregate Liquidation Amount of Trust Preferred Securities [Member] | Mission Oaks Statutory Trust One [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | 7,500 |  |
Aggregate Liquidation Amount of Common Capital Securities [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | 2,678 |  |
Aggregate Liquidation Amount of Common Capital Securities [Member] | Banner Capital Trust V [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | 774 |  |
Aggregate Liquidation Amount of Common Capital Securities [Member] | Banner Capital Trust VI [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | 774 |  |
Aggregate Liquidation Amount of Common Capital Securities [Member] | Banner Capital Trust VII [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | 774 |  |
Aggregate Liquidation Amount of Common Capital Securities [Member] | Greater Sacramento Bancorp Statutory Trust Two [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | 124 |  |
Aggregate Liquidation Amount of Common Capital Securities [Member] | Mission Oaks Statutory Trust One [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | 232 |  |
Debentures Subject to Mandatory Redemption [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | 89,178 |  |
Fair value adjustment | (21,701) |  |
Total TPS liability at fair value | $ 67,477 |  |
Current Interest Rate | 6.32% |  |
Debentures Subject to Mandatory Redemption [Member] | Banner Capital Trusts [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Grantor trusts amount of tier one risk based capital | $ 86,500 |  |
Grantor trusts percentage of tier one risk based capital | 4.30% |  |
Debentures Subject to Mandatory Redemption [Member] | Banner Capital Trust V [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | $ 25,774 |  |
Current Interest Rate | 6.35% |  |
Interest Rate Spread, Description | Three-month SOFR |  |
Interest Rate Spread | 1.83% |  |
Debentures Subject to Mandatory Redemption [Member] | Banner Capital Trust VI [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | $ 25,774 |  |
Current Interest Rate | 6.38% |  |
Interest Rate Spread, Description | Three-month SOFR |  |
Interest Rate Spread | 1.88% |  |
Debentures Subject to Mandatory Redemption [Member] | Banner Capital Trust VII [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | $ 25,774 |  |
Current Interest Rate | 6.23% |  |
Interest Rate Spread, Description | Three-month SOFR |  |
Interest Rate Spread | 1.64% |  |
Debentures Subject to Mandatory Redemption [Member] | Greater Sacramento Bancorp Statutory Trust Two [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | $ 4,124 |  |
Current Interest Rate | 6.30% |  |
Interest Rate Spread, Description | Three-month SOFR |  |
Interest Rate Spread | 1.94% |  |
Debentures Subject to Mandatory Redemption [Member] | Mission Oaks Statutory Trust One [Member] |  |  |
Schedule of Trust Preferred Securities [Line Items] |  |  |
Total TPS liability at par | $ 7,732 |  |
Current Interest Rate | 6.27% |  |
Interest Rate Spread, Description | Three-month SOFR |  |
Interest Rate Spread | 1.91% |  |

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