$RBB
RBB Bancorp Stock $rbb

$rbb Overview Financials Valuation SEC Filings Company Website

2021 Q1 Form 10-Q Financial Statement

#000143774921011186 Filed on May 07, 2021

Income Statement

Concept	2021 Q1	2020 Q1
Revenue	$35.54M	$34.03M
YoY Change	4.44%	-8.54%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$2.200M	$1.900M
YoY Change	15.79%	111.11%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$6.055M	$10.44M
YoY Change	-41.97%	-7.61%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$18.09M	$10.00M
YoY Change	80.87%	-29.77%
Income Tax	$5.600M	$3.252M
% Of Pretax Income	30.96%	32.52%
Net Earnings	$12.46M	$6.748M
YoY Change	84.59%	-34.99%
Net Earnings / Revenue	35.05%	19.83%
Basic Earnings Per Share	$0.64	$0.34
Diluted Earnings Per Share	$0.63	$0.33
COMMON SHARES
Basic Shares Outstanding	19.48M	19.96M
Diluted Shares Outstanding	19.81M

Balance Sheet

Concept	2021 Q1	2020 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$419.9M	$361.0M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$27.09M	$24.50M
YoY Change	10.58%	41.62%
Goodwill	$69.20M	$10.68M
YoY Change	547.94%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$3.400M	$0.00
YoY Change		-100.0%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$3.700B	$3.129B
YoY Change	18.26%	5.06%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$42.90M	$15.10M
YoY Change	184.11%	-11.18%
Accrued Expenses	$26.20M
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$69.10M	$15.10M
YoY Change	357.62%	-24.5%
LONG-TERM LIABILITIES
Long-Term Debt	$186.9M	$118.3M
YoY Change	57.99%	4.41%
Other Long-Term Liabilities	$1.300M	$1.000M
YoY Change	30.0%	66.67%
Total Long-Term Liabilities	$188.2M	$119.3M
YoY Change	57.75%	4.74%
TOTAL LIABILITIES
Total Short-Term Liabilities	$69.10M	$15.10M
Total Long-Term Liabilities	$188.2M	$119.3M
Total Liabilities	$3.229B	$2.721B
YoY Change	18.67%	4.91%
SHAREHOLDERS EQUITY
Retained Earnings	$147.8M
YoY Change
Common Stock	$287.9M
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$435.6M	$407.9M
YoY Change
Total Liabilities & Shareholders Equity	$3.664B	$3.129B
YoY Change	17.12%	5.06%

Cashflow Statement

Concept	2021 Q1	2020 Q1
OPERATING ACTIVITIES
Net Income	$12.46M	$6.748M
YoY Change	84.59%	-34.99%
Depreciation, Depletion And Amortization	$2.200M	$1.900M
YoY Change	15.79%	111.11%
Cash From Operating Activities	$109.2M	$78.20M
YoY Change	39.7%	-30.04%
INVESTING ACTIVITIES
Capital Expenditures	$478.0K	$135.0K
YoY Change	254.07%	-72.11%
Acquisitions	-$71.04M	-$6.634M
YoY Change	970.85%
Other Investing Activities	-$133.5M	-$40.60M
YoY Change	228.82%	1027.78%
Cash From Investing Activities	-$134.0M	-$40.75M
YoY Change	228.9%	896.58%
FINANCING ACTIVITIES
Cash Dividend Paid	$2.347M	$2.414M
YoY Change	-2.78%	20.28%
Common Stock Issuance & Retirement, Net	$2.277M	$5.254M
YoY Change	-56.66%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$250.1M	$141.8M
YoY Change	76.4%	-2774.1%
NET CHANGE
Cash From Operating Activities	$109.2M	$78.20M
Cash From Investing Activities	-$134.0M	-$40.75M
Cash From Financing Activities	$250.1M	$141.8M
Net Change In Cash	$225.3M	$179.2M
YoY Change	25.71%	75.01%
FREE CASH FLOW
Cash From Operating Activities	$109.2M	$78.20M
Capital Expenditures	$478.0K	$135.0K
Free Cash Flow	$108.8M	$78.07M
YoY Change	39.33%	-29.86%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	19572224
CY2021Q1	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7020000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7603000	USD
CY2021Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies	0	USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies	0	USD
CY2021Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000000
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000000
CY2021Q1	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2020Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2021Q1	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2021Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000
CY2021Q1	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2020Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2021Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	19528249
CY2021Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	19528249
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	19565921
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	19565921
CY2020Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2020Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	14900000	USD
CY2020Q4	rbb	Financing Receivable Number Of Loans90 Days Past Due And Still Accruing FinancingReceivableNumberOfLoans90DaysPastDueAndStillAccruing	0	USD
CY2020	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	0	USD
CY2021Q1	rbb	Number Of Loans Identified As Troubled Debt Restructurings NumberOfLoansIdentifiedAsTroubledDebtRestructurings	6	pure
CY2020Q4	rbb	Number Of Loans Identified As Troubled Debt Restructurings NumberOfLoansIdentifiedAsTroubledDebtRestructurings	6	pure
CY2020Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	0	USD
CY2020Q1	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	506000	USD
CY2020Q1	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	506000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	69200000	USD
CY2021Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2020Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2020Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2021Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y1M17D
CY2021Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y9M10D
CY2020	rbb	Write Down On Other Real Estate Owned WriteDownOnOtherRealEstateOwned	0	USD
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CY2020Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	137654000	USD
CY2021Q1	rbb	Federal Funds Sold And Other Cash Equivalents FederalFundsSoldAndOtherCashEquivalents	57000000	USD
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CY2021Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	419930000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	194654000	USD
CY2021Q1	rbb	Interestearning Deposits In Other Financial Institutions InterestearningDepositsInOtherFinancialInstitutions	600000	USD
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CY2021Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	281582000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	210867000	USD
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CY2021Q1	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	37675000	USD
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CY2020Q4	rbb	Loans And Leases Receivable Real Estate LoansAndLeasesReceivableRealEstate	2320216000	USD
CY2021Q1	rbb	Loans Receivable Commercial And Other LoansReceivableCommercialAndOther	401566000	USD
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CY2021Q1	us-gaap	Loans And Leases Receivable Before Fees Gross LoansAndLeasesReceivableBeforeFeesGross	2720482000	USD
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CY2020Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	-2872000	USD
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CY2021Q1	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2715205000	USD
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CY2021Q1	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	30795000	USD
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CY2021Q1	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	2684410000	USD
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CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	27103000	USD
CY2021Q1	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	15641000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	15641000	USD
CY2021Q1	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	3427000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	2547000	USD
CY2021Q1	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	293000	USD
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	293000	USD
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CY2020Q4	us-gaap	Goodwill Goodwill	69243000	USD
CY2021Q1	us-gaap	Servicing Asset ServicingAsset	13264000	USD
CY2020Q4	us-gaap	Servicing Asset ServicingAsset	13965000	USD
CY2021Q1	us-gaap	Finite Lived Core Deposits Gross FiniteLivedCoreDepositsGross	4895000	USD
CY2020Q4	us-gaap	Finite Lived Core Deposits Gross FiniteLivedCoreDepositsGross	5196000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	25500000	USD
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CY2021Q1	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	593178000	USD
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CY2021Q1	rbb	Reserve For Unfunded Commitments ReserveForUnfundedCommitments	1320000	USD
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CY2021Q1	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	150000000	USD
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CY2020Q4	us-gaap	Liabilities Liabilities	2921584000	USD
CY2021Q1	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
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CY2021Q1	us-gaap	Minority Interest MinorityInterest	72000	USD
CY2020Q4	us-gaap	Minority Interest MinorityInterest	72000	USD
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CY2020Q1	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	821000	USD
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CY2021Q1	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	157000	USD
CY2020Q1	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	478000	USD
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CY2021Q1	rbb	Interest On Other Borrowed Fnuds InterestOnOtherBorrowedFnuds	435000	USD
CY2020Q1	rbb	Interest On Other Borrowed Fnuds InterestOnOtherBorrowedFnuds	150000	USD
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CY2020Q1	us-gaap	Interest Expense InterestExpense	10435000	USD
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CY2020Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	23593000	USD
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CY2021Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	27985000	USD
CY2020Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	21648000	USD
CY2021Q1	rbb	Service Charges Fees And Other Income ServiceChargesFeesAndOtherIncome	1410000	USD
CY2020Q1	rbb	Service Charges Fees And Other Income ServiceChargesFeesAndOtherIncome	1079000	USD
CY2021Q1	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3841000	USD
CY2020Q1	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	2711000	USD
CY2021Q1	rbb	Loan Servicing Fees Net Of Amortization LoanServicingFeesNetOfAmortization	246000	USD
CY2020Q1	rbb	Loan Servicing Fees Net Of Amortization LoanServicingFeesNetOfAmortization	592000	USD
CY2021Q1	rbb	Recoveries On Loans Acquired In Business Combinations RecoveriesOnLoansAcquiredInBusinessCombinations	5000	USD
CY2020Q1	rbb	Recoveries On Loans Acquired In Business Combinations RecoveriesOnLoansAcquiredInBusinessCombinations	42000	USD
CY2021Q1	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-20000	USD
CY2020Q1	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	0	USD
CY2021Q1	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	225000	USD
CY2020Q1	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	0	USD
CY2021Q1	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	187000	USD
CY2020Q1	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	191000	USD
CY2021Q1	us-gaap	Noninterest Income NoninterestIncome	5894000	USD
CY2020Q1	us-gaap	Noninterest Income NoninterestIncome	4615000	USD
CY2021Q1	us-gaap	Labor And Related Expense LaborAndRelatedExpense	9242000	USD
CY2020Q1	us-gaap	Labor And Related Expense LaborAndRelatedExpense	9505000	USD
CY2021Q1	us-gaap	Occupancy Net OccupancyNet	2242000	USD
CY2020Q1	us-gaap	Occupancy Net OccupancyNet	2404000	USD
CY2021Q1	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1440000	USD
CY2020Q1	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1142000	USD
CY2021Q1	rbb	Legal And Professional Fees And Fees Reversal LegalAndProfessionalFeesAndFeesReversal	805000	USD
CY2020Q1	rbb	Legal And Professional Fees And Fees Reversal LegalAndProfessionalFeesAndFeesReversal	604000	USD
CY2021Q1	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	255000	USD
CY2020Q1	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	323000	USD
CY2021Q1	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	184000	USD
CY2020Q1	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	214000	USD
CY2021Q1	rbb	Insurance And Regulatory Assessments InsuranceAndRegulatoryAssessments	348000	USD
CY2020Q1	rbb	Insurance And Regulatory Assessments InsuranceAndRegulatoryAssessments	177000	USD
CY2021Q1	rbb	Core Deposit Premium Expense CoreDepositPremiumExpense	301000	USD
CY2020Q1	rbb	Core Deposit Premium Expense CoreDepositPremiumExpense	357000	USD
CY2021Q1	rbb	Foreclosed Real Estate Expense Income ForeclosedRealEstateExpenseIncome	5000	USD
CY2020Q1	rbb	Foreclosed Real Estate Expense Income ForeclosedRealEstateExpenseIncome	14000	USD
CY2021Q1	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	42000	USD
CY2020Q1	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	403000	USD
CY2021Q1	us-gaap	Other Noninterest Expense OtherNoninterestExpense	928000	USD
CY2020Q1	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1120000	USD
CY2021Q1	us-gaap	Noninterest Expense NoninterestExpense	15792000	USD
CY2020Q1	us-gaap	Noninterest Expense NoninterestExpense	16263000	USD
CY2021Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	18087000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	10000000	USD
CY2021Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5631000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3252000	USD
CY2021Q1	us-gaap	Profit Loss ProfitLoss	12456000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	6748000	USD
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.64
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.63
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2021Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.12
CY2020Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.12
CY2021Q1	us-gaap	Profit Loss ProfitLoss	12456000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	6748000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-1816000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	498000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-1816000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	498000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-537000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	148000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-537000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	148000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1279000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	350000	USD
CY2021Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	11177000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	7098000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	428488000	USD
CY2021Q1	us-gaap	Profit Loss ProfitLoss	12456000	USD
CY2021Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	287000	USD
CY2021Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2021Q1	us-gaap	Dividends Cash DividendsCash	2347000	USD
CY2021Q1	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	340000	USD
CY2021Q1	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	2277000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1279000	USD
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	435668000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	407690000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	6748000	USD
CY2020Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	161000	USD
CY2020Q1	us-gaap	Dividends Cash DividendsCash	2414000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	712000	USD
CY2020Q1	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	5254000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	350000	USD
CY2020Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	407993000	USD
CY2021Q1	us-gaap	Profit Loss ProfitLoss	12456000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	6748000	USD
CY2021Q1	rbb	Depreciation And Amortization Of Premises And Equipment DepreciationAndAmortizationOfPremisesAndEquipment	500000	USD
CY2020Q1	rbb	Depreciation And Amortization Of Premises And Equipment DepreciationAndAmortizationOfPremisesAndEquipment	522000	USD
CY2021Q1	rbb	Net Accretion Of Securities Loans Deposits And Other NetAccretionOfSecuritiesLoansDepositsAndOther	391000	USD
CY2020Q1	rbb	Net Accretion Of Securities Loans Deposits And Other NetAccretionOfSecuritiesLoansDepositsAndOther	873000	USD
CY2021Q1	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-20000	USD
CY2020Q1	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-0	USD
CY2021Q1	rbb	Amortization Of Investment In Affordable Housing Tax Credits AmortizationOfInvestmentInAffordableHousingTaxCredits	259000	USD
CY2020Q1	rbb	Amortization Of Investment In Affordable Housing Tax Credits AmortizationOfInvestmentInAffordableHousingTaxCredits	247000	USD
CY2021Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1707000	USD
CY2020Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1441000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	1314000	USD
CY2020Q1	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	0	USD
CY2021Q1	rbb	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-1257000	USD
CY2020Q1	rbb	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	0	USD
CY2021Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1500000	USD
CY2020Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1945000	USD
CY2021Q1	us-gaap	Share Based Compensation ShareBasedCompensation	287000	USD
CY2020Q1	us-gaap	Share Based Compensation ShareBasedCompensation	161000	USD
CY2021Q1	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-880000	USD
CY2020Q1	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	1503000	USD
CY2021Q1	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3841000	USD
CY2020Q1	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	2711000	USD
CY2021Q1	rbb	Increase Decrease In Cash Surrender Value Of Life Insurance IncreaseDecreaseInCashSurrenderValueOfLifeInsurance	187000	USD
CY2020Q1	rbb	Increase Decrease In Cash Surrender Value Of Life Insurance IncreaseDecreaseInCashSurrenderValueOfLifeInsurance	191000	USD
CY2021Q1	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	68236000	USD
CY2020Q1	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	30423000	USD
CY2021Q1	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	136866000	USD
CY2020Q1	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	104273000	USD
CY2021Q1	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	29129000	USD
CY2020Q1	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-4442000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	109246000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	78200000	USD
CY2021Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	176164000	USD
CY2020Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	151163000	USD
CY2021Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	103620000	USD
CY2020Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	151707000	USD
CY2021Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	500000	USD
CY2020Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	500000	USD
CY2021Q1	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-12000	USD
CY2020Q1	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	621000	USD
CY2021Q1	rbb	Purchase Of Investment In Qualified Affordable Housing Projects PurchaseOfInvestmentInQualifiedAffordableHousingProjects	309000	USD
CY2020Q1	rbb	Purchase Of Investment In Qualified Affordable Housing Projects PurchaseOfInvestmentInQualifiedAffordableHousingProjects	2004000	USD
CY2021Q1	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	61207000	USD
CY2020Q1	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	45668000	USD
CY2021Q1	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-0	USD
CY2020Q1	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-6634000	USD
CY2021Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	478000	USD
CY2020Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	135000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-134026000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-40750000	USD
CY2021Q1	rbb	Increase Decrease In Demand Deposits And Savings Accounts IncreaseDecreaseInDemandDepositsAndSavingsAccounts	230636000	USD
CY2020Q1	rbb	Increase Decrease In Demand Deposits And Savings Accounts IncreaseDecreaseInDemandDepositsAndSavingsAccounts	-108420000	USD
CY2021Q1	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-44407000	USD
CY2020Q1	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	107130000	USD
CY2021Q1	rbb	Increase In Long Term Advances From Federal Home Loan Bank IncreaseInLongTermAdvancesFromFederalHomeLoanBank	0	USD
CY2020Q1	rbb	Increase In Long Term Advances From Federal Home Loan Bank IncreaseInLongTermAdvancesFromFederalHomeLoanBank	150000000	USD
CY2021Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	2347000	USD
CY2020Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	2414000	USD
CY2021Q1	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	50000000	USD
CY2020Q1	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	-0	USD
CY2021Q1	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	118111000	USD
CY2020Q1	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	USD
CY2021Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2277000	USD
CY2020Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	5254000	USD
CY2021Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	340000	USD
CY2020Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	712000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	250056000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	141754000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	225276000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	179204000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	194654000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	181763000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	419930000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	360967000	USD
CY2021Q1	us-gaap	Interest Paid Net InterestPaidNet	5298000	USD
CY2020Q1	us-gaap	Interest Paid Net InterestPaidNet	8643000	USD
CY2021Q1	rbb	Transfer From Transfer To Loans Held For Sale Net TransferFromTransferToLoansHeldForSaleNet	52771000	USD
CY2020Q1	rbb	Transfer From Transfer To Loans Held For Sale Net TransferFromTransferToLoansHeldForSaleNet	15041000	USD
CY2021Q1	rbb	Loan To Facilitate Other Real Estate Owned LoanToFacilitateOtherRealEstateOwned	0	USD
CY2020Q1	rbb	Loan To Facilitate Other Real Estate Owned LoanToFacilitateOtherRealEstateOwned	1025000	USD
CY2021Q1	rbb	Additions To Servicing Asset AdditionsToServicingAsset	705000	USD
CY2020Q1	rbb	Additions To Servicing Asset AdditionsToServicingAsset	827000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1279000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	350000	USD
CY2021Q1	rbb	Recognition Of Operating Lease Right Of Use Assets RecognitionOfOperatingLeaseRightOfUseAssets	26814000	USD
CY2020Q1	rbb	Recognition Of Operating Lease Right Of Use Assets RecognitionOfOperatingLeaseRightOfUseAssets	-0	USD
CY2021Q1	rbb	Recognition Of Operating Lease Liabilities RecognitionOfOperatingLeaseLiabilities	26814000	USD
CY2020Q1	rbb	Recognition Of Operating Lease Liabilities RecognitionOfOperatingLeaseLiabilities	0	USD
CY2021Q1	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	0	USD
CY2020Q1	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	182895000	USD
CY2021Q1	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	0	USD
CY2020Q1	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	200209000	USD
CY2021Q1	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	0	USD
CY2020Q1	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	32885000	USD
CY2021Q1	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2020Q1	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	10680000	USD
CY2021Q1	us-gaap	Nature Of Operations NatureOfOperations	<p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; text-align: justify; margin: 0pt;"><b>NOTE <em style="font: inherit;">1</em> - BUSINESS DESCRIPTION</b></p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; text-align: justify; margin: 0pt; text-indent: 27pt;">RBB Bancorp (“RBB”) is a financial holding company registered under the Bank Holding Company Act of <em style="font: inherit;">1956,</em> as amended. RBB Bancorp’s principal business is to serve as the holding company for its wholly-owned banking subsidiaries, Royal Business Bank ("Bank") and RBB Asset Management Company ("RAM"), collectively referred to herein as "the Company". RAM was formed to hold and manage problem assets acquired in business combinations.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; text-align: justify; margin: 0pt; text-indent: 27pt;">At <em style="font: inherit;"> March </em><em style="font: inherit;">31,</em> <em style="font: inherit;">2021,</em> the Company had total consolidated assets of $3.7 billion, gross consolidated loans (held for investment and held for sale) of $2.8 billion, total consolidated deposits of $2.8 billion and total consolidated stockholders' equity of $435.7 million. RBB’s common stock trades on the Nasdaq Global Select Market under the symbol “RBB”.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; text-align: justify; margin: 0pt; text-indent: 27pt;">The Bank provides business-banking services to the Chinese-American communities in Los Angeles County, Orange County and Ventura County in California, in Las Vegas, Nevada, the New York City, New York metropolitan area, including Edison, New Jersey, and Chicago, Illinois. Specific services include remote deposit, E-banking, mobile banking, commercial and investor real estate loans, business loans and lines of credit, Small Business Administration (“SBA”) <i><em style="font: inherit;">7A</em></i> and <i><em style="font: inherit;">504</em></i> loans, mortgage loans, trade finance and a full range of depository accounts.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; text-align: justify; margin: 0pt; text-indent: 27pt;">The Company operates full-service banking offices in Arcadia, Cerritos, Diamond Bar, Irvine, Los Angeles, Monterey Park, Oxnard, Rowland Heights, San Gabriel, Silver Lake, Torrance, and Westlake Village, California; Las Vegas, Nevada; Manhattan, Brooklyn, Flushing, and Elmhurst, New York; the Chinatown and Bridgeport neighborhoods of Chicago, Illinois; and Edison, New Jersey. The Company’s primary source of revenue is providing loans to customers, who are predominantly small and middle-market businesses and individuals.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; text-align: justify; margin: 0pt; text-indent: 27pt;">The Company generates its revenue primarily from interest received on loans and leases and, to a lesser extent, from interest received on investment securities. The Company also derives income from noninterest sources, such as fees received in connection with various lending and deposit services, loan servicing, gain on sales of loans and wealth management services. The Company’s principle expenses include interest expense on deposits and subordinated debentures, and operating expenses, such as salaries and employee benefits, occupancy and equipment, data processing, and income tax expense.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; text-align: justify; margin: 0pt; text-indent: 27pt;">The Company has completed six acquisitions from <em style="font: inherit;"> July 2011 </em>through <em style="font: inherit;"> January 2020, </em>including the acquisition of Pacific Global Bank Holdings, Inc. (“PGBH”) and its wholly-owned subsidiary, Pacific Global Bank (“PGB”), in which the PGBH acquisition closed on <em style="font: inherit;"> January 10, 2020. </em>PGB operated branches in the Chicago neighborhoods of Chinatown and Bridgeport. See Note <em style="font: inherit;">3</em> – Acquisition, for more information about the PGBH acquisition transaction. All of the Company’s acquisitions have been accounted for using the acquisition method of accounting and, accordingly, the operating results of the acquired entities have been included in the consolidated financial statements from their respective acquisition dates.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p>
CY2021Q1	us-gaap	Assets Assets	3700000000	USD
CY2021Q1	rbb	Loans Held For Investment And Held For Sale Gross LoansHeldForInvestmentAndHeldForSaleGross	2800000000	USD
CY2021Q1	us-gaap	Deposits Deposits	2800000000	USD
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	435700000	USD
	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	6	pure
CY2021Q1	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; text-align: justify; margin: 0pt;"><span style="text-decoration: underline; ">Use of Estimates in the Preparation of Financial Statements</span></p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; text-align: justify; margin: 0pt; text-indent: 27pt;">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. It is reasonably possible our estimate of the allowance for loan losses and the fair value of mortgage servicing rights could change as actual results could differ from those estimates. Actual results could differ from those estimates.</p>
CY2021Q1	rbb	Loans Held For Investment And Held For Sale Gross LoansHeldForInvestmentAndHeldForSaleGross	2800000000	USD
CY2020Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents	17033000	USD
CY2020Q1	rbb	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Federal Funds Sold BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFederalFundsSold	8300000	USD
CY2020Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Financial Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialAssets	14186000	USD
CY2020Q1	rbb	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Loans Receivable BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansReceivable	173109000	USD
CY2020Q1	rbb	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Financial Assets Allowance For Losses BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialAssetsAllowanceForLosses	0	USD
CY2020Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	8033000	USD
CY2020Q1	rbb	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Core Deposit Premium BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCoreDepositPremium	491000	USD
CY2020Q1	rbb	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Investments In Trust BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInvestmentsInTrust	155000	USD
CY2020Q1	rbb	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets	1107000	USD
CY2020Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	222414000	USD
CY2020Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Financial Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialLiabilities	188362000	USD
CY2020Q1	rbb	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Escrow Payable BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEscrowPayable	4277000	USD
CY2020Q1	rbb	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Subordinated Debentures BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedSubordinatedDebentures	4392000	USD
CY2020Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities	2351000	USD
CY2020Q1	rbb	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherLiabilities	827000	USD
CY2020Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	200209000	USD
CY2020Q1	rbb	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Excess Of Assets Acquired Over Liabilities Assumed BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedExcessOfAssetsAcquiredOverLiabilitiesAssumed	22205000	USD
CY2020Q1	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	32885000	USD
CY2020Q1	us-gaap	Goodwill Goodwill	10680000	USD
CY2021Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	281794000	USD
CY2021Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1080000	USD
CY2021Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1292000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	281582000	USD
CY2021Q1	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	6668000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	352000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2021Q1	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7020000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	209263000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1731000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	127000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	210867000	USD
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	7174000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	429000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7603000	USD
CY2021Q1	us-gaap	Security Owned And Pledged As Collateral Fair Value SecurityOwnedAndPledgedAsCollateralFairValue	252000	USD
CY2020Q4	us-gaap	Security Owned And Pledged As Collateral Fair Value SecurityOwnedAndPledgedAsCollateralFairValue	320000	USD
CY2021Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	132201000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	132222000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	61628000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	61898000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	83145000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	82945000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	4820000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	4517000	USD
CY2021Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	281794000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	281582000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	399000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	403000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	1508000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	1620000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	1320000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1366000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	3441000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	3631000	USD
CY2021Q1	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	6668000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7020000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	115445000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	115464000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	34869000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	35607000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	53328000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	54128000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	5621000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	5668000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	209263000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	210867000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	899000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	910000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	1508000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	1636000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	874000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	925000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	3893000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	4132000	USD
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	7174000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7603000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1292000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	201385000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	45	pure
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	0	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	0	pure
CY2021Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1292000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	201385000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	45	pure
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	127000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	60571000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	17	pure
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	-0	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	0	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	0	pure
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	127000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	60571000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	17	pure
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	20000	USD
CY2020Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	0	USD
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	14900000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	29337000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	18816000	USD
CY2021Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1500000	USD
CY2020Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1945000	USD
CY2021Q1	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	42000	USD
CY2020Q1	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	631000	USD
CY2021Q1	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	0	USD
CY2020Q1	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	0	USD
CY2021Q1	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	30795000	USD
CY2020Q1	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	20130000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	18816000	USD
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	11823000	USD
CY2020	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	1303000	USD
CY2020	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	29337000	USD
CY2021Q1	rbb	Allowance For Credit Losses Reserve Change In Method Of Calculating Impairment AllowanceForCreditLossesReserveChangeInMethodOfCalculatingImpairment	30795000	USD
CY2021Q1	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	19911000	USD
CY2021Q1	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2695294000	USD
CY2021Q1	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2715205000	USD
CY2020Q1	rbb	Allowance For Credit Losses Reserve Change In Method Of Calculating Impairment AllowanceForCreditLossesReserveChangeInMethodOfCalculatingImpairment	20130000	USD
CY2020Q1	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	20274000	USD
CY2020Q1	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2379708000	USD
CY2020Q1	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2399982000	USD
CY2020Q4	rbb	Allowance For Credit Losses Reserve Change In Method Of Calculating Impairment AllowanceForCreditLossesReserveChangeInMethodOfCalculatingImpairment	29337000	USD
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	19554000	USD
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2687212000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2706766000	USD
CY2021Q1	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2715205000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2706766000	USD
CY2021Q1	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	21044000	USD
CY2021Q1	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	2694161000	USD
CY2021Q1	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2715205000	USD
CY2021Q1	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	17978000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	24759000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	2682007000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2706766000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	17584000	USD
CY2021Q1	rbb	Financing Receivable Number Of Loans90 Days Past Due And Still Accruing FinancingReceivableNumberOfLoans90DaysPastDueAndStillAccruing	0	USD
CY2021Q1	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	20273000	USD
CY2021Q1	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	19911000	USD
CY2021Q1	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	524000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	19751000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	19554000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	525000	USD
CY2021Q1	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	20697000	USD
CY2021Q1	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	40000	USD
CY2020Q1	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	22787000	USD
CY2020Q1	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	37000	USD
CY2021Q1	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	0	USD
CY2021Q1	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	3000000.0	USD
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	3100000	USD
CY2021Q1	rbb	Financing Receivable Nonaccrual Troubled Debt Restructuring FinancingReceivableNonaccrualTroubledDebtRestructuring	1100000	USD
CY2020Q4	rbb	Financing Receivable Nonaccrual Troubled Debt Restructuring FinancingReceivableNonaccrualTroubledDebtRestructuring	1100000	USD
CY2021Q1	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	0	USD
CY2021Q1	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	pure
CY2021Q1	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	pure
CY2020Q1	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	1	pure
CY2021Q1	rbb	Loan Servicing Fees Net Of Amortization LoanServicingFeesNetOfAmortization	246000	USD
CY2020Q1	rbb	Loan Servicing Fees Net Of Amortization LoanServicingFeesNetOfAmortization	592000	USD
CY2021Q1	us-gaap	Goodwill Goodwill	69200000	USD
CY2021Q1	us-gaap	Finite Lived Core Deposits Gross FiniteLivedCoreDepositsGross	4900000	USD
CY2020Q4	us-gaap	Finite Lived Core Deposits Gross FiniteLivedCoreDepositsGross	5200000	USD
CY2021Q1	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	1177404000	USD
CY2021Q1	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	60515000	USD
CY2021Q1	rbb	Time Deposit Maturities Over Three Years TimeDepositMaturitiesOverThreeYears	4449000	USD
CY2021Q1	us-gaap	Time Deposits TimeDeposits	1242368000	USD
CY2021Q1	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	175000000	USD
CY2020Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	105000000	USD
CY2021Q1	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	2419000	USD
CY2020Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	609000	USD
CY2021Q1	us-gaap	Interest Expense Debt InterestExpenseDebt	1729000	USD
CY2020Q1	us-gaap	Interest Expense Debt InterestExpenseDebt	1662000	USD
CY2021Q1	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	79000	USD
CY2020Q1	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	86000	USD
CY2021Q1	rbb	Debt Amortization Expense DebtAmortizationExpense	55000	USD
CY2020Q1	rbb	Debt Amortization Expense DebtAmortizationExpense	55000	USD
CY2021Q1	us-gaap	Interest Expense Loans From Other Federal Home Loan Banks InterestExpenseLoansFromOtherFederalHomeLoanBanks	435000	USD
CY2020Q1	us-gaap	Interest Expense Loans From Other Federal Home Loan Banks InterestExpenseLoansFromOtherFederalHomeLoanBanks	150000	USD
CY2021Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5600000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3300000	USD
CY2021Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.311	pure
CY2020Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.325	pure
CY2021Q1	rbb	Employee Service Share Based Compensation Tax Charge Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxChargeBenefitFromExerciseOfStockOptions	56000	USD
CY2020Q1	rbb	Employee Service Share Based Compensation Tax Charge Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxChargeBenefitFromExerciseOfStockOptions	28000	USD
CY2021Q1	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Face Amount Liability FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability	527962000	USD
CY2020Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Face Amount Liability FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability	562440000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	3476000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	4720000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3749000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	2685000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2532000	USD
CY2021Q1	rbb	Lessee Operating Lease Liability To Be Paid After Year Four LesseeOperatingLeaseLiabilityToBePaidAfterYearFour	9478000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	26640000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	441000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	26199000	USD
CY2021Q1	us-gaap	Operating Lease Expense OperatingLeaseExpense	1300000	USD
CY2020Q1	us-gaap	Operating Lease Expense OperatingLeaseExpense	1500000	USD
CY2021Q1	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	105000	USD
CY2020Q1	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	84000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	25500000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	26814000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	26199000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	27456000	USD
CY2021Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y3M
CY2021Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y4M13D
CY2021Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0095	pure
CY2021Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0094	pure
CY2020Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	1243000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	4000000	USD
CY2021Q1	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	350000	USD
CY2020	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	11498000	USD
CY2021Q1	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	1593000	USD
CY2020	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	14255000	USD
CY2021Q1	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	0	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	1243000	USD
CY2021Q1	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	287000	USD
CY2020Q1	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	161000	USD
CY2021Q1	rbb	Employee Service Share Based Compensation Tax Expense From Compensation Expense EmployeeServiceShareBasedCompensationTaxExpenseFromCompensationExpense	56000	USD
CY2020Q1	rbb	Employee Service Share Based Compensation Tax Expense From Compensation Expense EmployeeServiceShareBasedCompensationTaxExpenseFromCompensationExpense	28000	USD
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.308	pure
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.318	pure
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.285	pure
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0186	pure
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0248	pure
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0199	pure
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0026	pure
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0029	pure
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0131	pure
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	4.14
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	2.97
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	4.61
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1106470
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.30
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	135000
CY2021Q1	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	17.74
CY2021Q1	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	32289
CY2021Q1	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	10.53
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	-0
CY2021Q1	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	0
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1209181
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.89
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	7728000	USD
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	963681
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	13.06
CY2021Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	6954000	USD
CY2021Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	740000	USD
CY2020Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	350000	USD
CY2020Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	245500
CY2020Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	147000
CY2021Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	4.11
CY2020Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	4.43
CY2021Q1	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	32289
CY2021Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	340000	USD
CY2020Q1	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	56498
CY2020Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	712000	USD
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	305000	USD
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	278000	USD
CY2015Q1	rbb	Tier One Risk Based Common Equity Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCommonEquityCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.045	pure
CY2015Q1	rbb	Tier One Risk Based Common Equity Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCommonEquityCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.065	pure
CY2015Q1	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.040	pure
CY2015Q1	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.060	pure
CY2015Q1	rbb	Increased Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets IncreasedTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.060	pure
CY2015Q1	rbb	Increased Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets IncreasedTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.080	pure
CY2021Q1	rbb	Capital Conservation Buffer CapitalConservationBuffer	0.025	pure
CY2016Q1	rbb	Capital Conservation Buffer CapitalConservationBuffer	0.00625	pure
CY2019Q1	rbb	Capital Conservation Buffer CapitalConservationBuffer	0.025	pure
CY2021Q1	rbb	Required Assets To Liabilities Ratio After Dividend Effect RequiredAssetsToLiabilitiesRatioAfterDividendEffect	1.25	pure
CY2021Q1	rbb	Write Down On Other Real Estate Owned WriteDownOnOtherRealEstateOwned	0	USD
CY2021Q1	us-gaap	Profit Loss ProfitLoss	12456000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	6748000	USD
CY2021Q1	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	40000	USD
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	10000	USD
CY2021Q1	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	19528249
CY2020	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	19739280
CY2021Q1	rbb	Weighted Average Number Of Shares Impact WeightedAverageNumberOfSharesImpact	-52435
CY2020	rbb	Weighted Average Number Of Shares Impact WeightedAverageNumberOfSharesImpact	232576
CY2021Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	12416000	USD
CY2021Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19475814
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	6738000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19971856
CY2021Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	337027
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	294472
CY2021Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	12416000	USD
CY2021Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19812841
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	6738000	USD
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20266328
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.64
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.63
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2021Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1452000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1052000	USD
CY2021Q1	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	4442000	USD
CY2020Q1	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	3563000	USD
CY2021Q1	us-gaap	Noninterest Income NoninterestIncome	5894000	USD
CY2020Q1	us-gaap	Noninterest Income NoninterestIncome	4615000	USD
CY2021Q1	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	7400000	USD
CY2020Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	7600000	USD
CY2021Q1	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	1300000	USD
CY2020Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	1600000	USD
CY2021Q1	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	259000	USD
CY2020Q1	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	247000	USD

Files In Submission

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0001437749-21-011186.txt	Edgar Link	pending
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$RBB
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2021 Q1 Form 10-Q Financial Statement

#000143774921011186 Filed on May 07, 2021

Income Statement

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Facts In Submission

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$RBB RBB Bancorp Stock $rbb

2021 Q1 Form 10-Q Financial Statement

#000143774921011186 Filed on May 07, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$RBB
RBB Bancorp Stock $rbb