XML 92 R78.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Note 9 - Long-term Debt (Details Textual) - USD ($) $ in Thousands |  | 1 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 01, 2023 | Mar. 31, 2021 | Nov. 30, 2018 | Dec. 31, 2023 | Dec. 31, 2022
Debt Instrument, Face Amount |  |  |  | $ 120,000 | $ 175,000
Six Point One Eight Percent Fixed To Floating Rate Subordinated Debentures Due December First Two Thousands Twenty Eight [Member] |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 55,000 | 0 | 55,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate |  |  | 6.18% |  |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed | 100.00% |  |  |  |
Six Point One Eight Percent Fixed To Floating Rate Subordinated Debentures Due December First Two Thousands Twenty Eight [Member] | London Interbank Offered Rate [Member] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 3.15% |  |
Four Percent Fixed To Floating Rate Subordinated Debentures Due April First Two Thousand Thirty One [Member] |  |  |  |  |
Debt Instrument, Face Amount |  | $ 120,000 |  | $ 120,000 | $ 120,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate |  | 4.00% |  |  |
Four Percent Fixed To Floating Rate Subordinated Debentures Due April First Two Thousand Thirty One [Member] | Secured Overnight Financing Rate (SOFR) [Member] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 3.29% |  |  |

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482900/835-30-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-2 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482949/835-30-55-8 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage of principal amount of debt redeemed. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LongTermDebtPercentageBearingFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentAxis=rbb_SixPointOneEightPercentFixedToFloatingRateSubordinatedDebenturesDueDecemberFirstTwoThousandsTwentyEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=rbb_LondonInterbankOfferedRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=rbb_FourPercentFixedToFloatingRateSubordinatedDebenturesDueAprilFirstTwoThousandThirtyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=rbb_SecuredOvernightFinancingRateSofrMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |