$RBB
RBB Bancorp Stock $rbb

$rbb Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-Q Financial Statement

#000143774920023147 Filed on November 09, 2020

Income Statement

Concept	2020 Q4	2020 Q3	2019 Q3
Revenue	$35.86M	$35.13M	$34.67M
YoY Change	5.77%	1.32%	41.66%
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	$1.800M
YoY Change	29.41%	5.56%	260.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$6.987M	$7.874M	$11.16M
YoY Change	-35.21%	-29.43%	90.49%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$15.91M	$12.14M	$11.70M
YoY Change	7.3%	3.74%	12.81%
Income Tax	$4.759M	$3.619M	$3.689M
% Of Pretax Income	29.92%	29.81%	31.53%
Net Earnings	$11.15M	$8.520M	$8.012M
YoY Change	4.42%	6.34%	-3.83%
Net Earnings / Revenue	31.08%	24.26%	23.11%
Basic Earnings Per Share	$0.57	$0.43	$0.40
Diluted Earnings Per Share	$0.56	$0.43	$0.39
COMMON SHARES
Basic Shares Outstanding	19.72M	19.72M	20.07M
Diluted Shares Outstanding		19.80M	20.43M

Balance Sheet

Concept	2020 Q4	2020 Q3	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$194.7M	$178.6M	$183.1M
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	$27.10M	$24.24M	$16.87M
YoY Change	61.2%	43.66%	108.28%
Goodwill	$69.20M	$69.20M	$58.38M
YoY Change	18.09%	18.53%	95.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$2.500M	$1.100M	$4.400M
YoY Change	8.7%	-75.0%	-39.73%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$3.350B	$3.400B	$2.820B
YoY Change	20.14%	20.55%	31.98%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$16.40M	$16.70M	$20.30M
YoY Change	-5.75%	-17.73%	53.79%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$16.40M	$16.70M	$20.30M
YoY Change	-5.75%	-17.73%	53.79%
LONG-TERM LIABILITIES
Long-Term Debt	$118.7M	$118.5M	$113.6M
YoY Change	4.4%	4.31%	113.94%
Other Long-Term Liabilities	$1.400M	$1.100M	$600.0K
YoY Change	75.0%	83.33%	0.0%
Total Long-Term Liabilities	$120.1M	$119.6M	$114.2M
YoY Change	4.89%	4.73%	112.66%
TOTAL LIABILITIES
Total Short-Term Liabilities	$16.40M	$16.70M	$20.30M
Total Long-Term Liabilities	$120.1M	$119.6M	$114.2M
Total Liabilities	$2.922B	$2.938B	$2.421B
YoY Change	22.71%	21.34%	31.47%
SHAREHOLDERS EQUITY
Retained Earnings	$138.1M	$128.8M	$103.4M
YoY Change	23.25%	24.61%
Common Stock	$289.2M	$291.5M	$295.1M
YoY Change	-2.08%	-1.2%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$428.4M	$421.3M	$398.8M
YoY Change
Total Liabilities & Shareholders Equity	$3.350B	$3.360B	$2.820B
YoY Change	20.14%	19.12%	31.99%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2019 Q3
OPERATING ACTIVITIES
Net Income	$11.15M	$8.520M	$8.012M
YoY Change	4.42%	6.34%	-3.83%
Depreciation, Depletion And Amortization	$2.200M	$1.900M	$1.800M
YoY Change	29.41%	5.56%	260.0%
Cash From Operating Activities	$44.40M	$10.00M	$11.80M
YoY Change	-78.81%	-15.25%	-114.66%
INVESTING ACTIVITIES
Capital Expenditures	-$3.300M	-$800.0K	-$200.0K
YoY Change	725.0%	300.0%	-80.0%
Acquisitions
YoY Change
Other Investing Activities	-$4.100M	-$196.6M	-$42.30M
YoY Change	-97.6%	364.78%	-67.66%
Cash From Investing Activities	-$7.400M	-$197.4M	-$42.40M
YoY Change	-95.67%	365.57%	-67.83%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-20.90M	214.1M	8.100M
YoY Change	-47.49%	2543.21%	-97.4%
NET CHANGE
Cash From Operating Activities	44.40M	10.00M	11.80M
Cash From Investing Activities	-7.400M	-197.4M	-42.40M
Cash From Financing Activities	-20.90M	214.1M	8.100M
Net Change In Cash	16.10M	26.70M	-22.50M
YoY Change	-1338.46%	-218.67%	-122.8%
FREE CASH FLOW
Cash From Operating Activities	$44.40M	$10.00M	$11.80M
Capital Expenditures	-$3.300M	-$800.0K	-$200.0K
Free Cash Flow	$47.70M	$10.80M	$12.00M
YoY Change	-77.27%	-10.0%	-115.09%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000000
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CY2019Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
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	rbb	Interest On Other Borrowed Fnuds InterestOnOtherBorrowedFnuds	1033000	USD
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	rbb	Dividend Income On Federal Home Loan Bank Stock DividendIncomeOnFederalHomeLoanBankStock	379000	USD
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	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	17765000	USD
	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	21788000	USD
CY2020Q3	us-gaap	Interest Expense Long Term Debt And Capital Securities InterestExpenseLongTermDebtAndCapitalSecurities	1905000	USD
CY2019Q3	us-gaap	Interest Expense Long Term Debt And Capital Securities InterestExpenseLongTermDebtAndCapitalSecurities	1921000	USD
	us-gaap	Interest Expense Long Term Debt And Capital Securities InterestExpenseLongTermDebtAndCapitalSecurities	5776000	USD
	us-gaap	Interest Expense Long Term Debt And Capital Securities InterestExpenseLongTermDebtAndCapitalSecurities	5783000	USD
CY2020Q3	rbb	Interest On Other Borrowed Fnuds InterestOnOtherBorrowedFnuds	444000	USD
CY2019Q3	rbb	Interest On Other Borrowed Fnuds InterestOnOtherBorrowedFnuds	81000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	6000	USD
	rbb	Interest On Other Borrowed Fnuds InterestOnOtherBorrowedFnuds	2857000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	7874000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	11157000	USD
	us-gaap	Interest Expense InterestExpense	27378000	USD
	us-gaap	Interest Expense InterestExpense	34077000	USD
CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	27251000	USD
CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	23512000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	75878000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	73741000	USD
CY2020Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	3861000	USD
CY2019Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	824000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8815000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1731000	USD
CY2020Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	23390000	USD
CY2019Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	22688000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	67063000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	72010000	USD
CY2020Q3	rbb	Service Charges Fees And Other Income ServiceChargesFeesAndOtherIncome	1199000	USD
CY2019Q3	rbb	Service Charges Fees And Other Income ServiceChargesFeesAndOtherIncome	934000	USD
	rbb	Service Charges Fees And Other Income ServiceChargesFeesAndOtherIncome	3343000	USD
	rbb	Service Charges Fees And Other Income ServiceChargesFeesAndOtherIncome	2976000	USD
CY2020Q3	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	760000	USD
CY2019Q3	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	813000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3552000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	6131000	USD
CY2020Q3	rbb	Loan Servicing Fees Net Of Amortization LoanServicingFeesNetOfAmortization	546000	USD
CY2019Q3	rbb	Loan Servicing Fees Net Of Amortization LoanServicingFeesNetOfAmortization	827000	USD
	rbb	Loan Servicing Fees Net Of Amortization LoanServicingFeesNetOfAmortization	1846000	USD
	rbb	Loan Servicing Fees Net Of Amortization LoanServicingFeesNetOfAmortization	2566000	USD
CY2020Q3	rbb	Recoveries On Loans Acquired In Business Combinations RecoveriesOnLoansAcquiredInBusinessCombinations	32000	USD
CY2019Q3	rbb	Recoveries On Loans Acquired In Business Combinations RecoveriesOnLoansAcquiredInBusinessCombinations	12000	USD
	rbb	Recoveries On Loans Acquired In Business Combinations RecoveriesOnLoansAcquiredInBusinessCombinations	79000	USD
	rbb	Recoveries On Loans Acquired In Business Combinations RecoveriesOnLoansAcquiredInBusinessCombinations	73000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-56000	USD
CY2019Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	0	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-56000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	147000	USD
CY2020Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	194000	USD
CY2019Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	195000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	576000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	580000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	52000	USD
CY2019Q3	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	7000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	210000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	7000	USD
CY2020Q3	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0	USD
CY2019Q3	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	11000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	11000	USD
CY2020Q3	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
CY2019Q3	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	2727000	USD
CY2019Q3	us-gaap	Noninterest Income NoninterestIncome	2799000	USD
	us-gaap	Noninterest Income NoninterestIncome	9550000	USD
	us-gaap	Noninterest Expense NoninterestExpense	45060000	USD
	us-gaap	Noninterest Expense NoninterestExpense	44010000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	40497000	USD
	us-gaap	Noninterest Income NoninterestIncome	12497000	USD
CY2020Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	7599000	USD
CY2019Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	7801000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	25207000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	25088000	USD
CY2020Q3	us-gaap	Occupancy Net OccupancyNet	2360000	USD
CY2019Q3	us-gaap	Occupancy Net OccupancyNet	2434000	USD
	us-gaap	Occupancy Net OccupancyNet	7291000	USD
	us-gaap	Occupancy Net OccupancyNet	7360000	USD
CY2020Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1200000	USD
CY2019Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	974000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	3224000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	3202000	USD
CY2020Q3	rbb	Legal And Professional Fees And Fees Reversal LegalAndProfessionalFeesAndFeesReversal	675000	USD
CY2019Q3	rbb	Legal And Professional Fees And Fees Reversal LegalAndProfessionalFeesAndFeesReversal	435000	USD
	rbb	Legal And Professional Fees And Fees Reversal LegalAndProfessionalFeesAndFeesReversal	1949000	USD
	rbb	Legal And Professional Fees And Fees Reversal LegalAndProfessionalFeesAndFeesReversal	1516000	USD
CY2020Q3	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	271000	USD
CY2019Q3	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	335000	USD
	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	931000	USD
	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	965000	USD
CY2020Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	131000	USD
CY2019Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	248000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	456000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	926000	USD
CY2020Q3	rbb	Insurance And Regulatory Assessments InsuranceAndRegulatoryAssessments	363000	USD
CY2019Q3	rbb	Insurance And Regulatory Assessments InsuranceAndRegulatoryAssessments	172000	USD
	rbb	Insurance And Regulatory Assessments InsuranceAndRegulatoryAssessments	774000	USD
	rbb	Insurance And Regulatory Assessments InsuranceAndRegulatoryAssessments	754000	USD
CY2020Q3	rbb	Core Deposit Premium Expense CoreDepositPremiumExpense	357000	USD
CY2019Q3	rbb	Core Deposit Premium Expense CoreDepositPremiumExpense	384000	USD
	rbb	Core Deposit Premium Expense CoreDepositPremiumExpense	1071000	USD
	rbb	Core Deposit Premium Expense CoreDepositPremiumExpense	1157000	USD
CY2020Q3	rbb	Foreclosed Real Estate Expense Income ForeclosedRealEstateExpenseIncome	3000	USD
CY2019Q3	rbb	Foreclosed Real Estate Expense Income ForeclosedRealEstateExpenseIncome	-1000	USD
	rbb	Foreclosed Real Estate Expense Income ForeclosedRealEstateExpenseIncome	31000	USD
	rbb	Foreclosed Real Estate Expense Income ForeclosedRealEstateExpenseIncome	161000	USD
CY2020Q3	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	62000	USD
CY2019Q3	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	154000	USD
	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	741000	USD
	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	240000	USD
CY2020Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	957000	USD
CY2019Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	850000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3385000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	2641000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	13978000	USD
CY2019Q3	us-gaap	Noninterest Expense NoninterestExpense	13786000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	12139000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	11701000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	31553000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3619000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3689000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9772000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11963000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1669000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	8409000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	8353000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	22557000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	30203000	USD
CY2020Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	414025000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	8520000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	8012000	USD
	us-gaap	Profit Loss ProfitLoss	21781000	USD
	us-gaap	Profit Loss ProfitLoss	28534000	USD
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.43
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.40
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.10
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.42
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.43
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.39
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.09
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.40
CY2020Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.06
CY2019Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.10
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.24
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.30
CY2020Q3	us-gaap	Profit Loss ProfitLoss	8520000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	8012000	USD
	us-gaap	Profit Loss ProfitLoss	21781000	USD
	us-gaap	Profit Loss ProfitLoss	28534000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-106000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	494000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	1311000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	2380000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	52000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	7000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	210000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	7000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-158000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	487000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	1101000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	2373000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-32000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	148000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	387000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	706000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	15000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	2000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	62000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	2000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-47000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	146000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	325000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	704000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-111000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	341000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	776000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	8520000	USD
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	166000	USD
CY2020Q3	us-gaap	Dividends Cash DividendsCash	1184000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-111000	USD
CY2020Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	421416000	USD
CY2019Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	393820000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	8012000	USD
CY2019Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	147000	USD
CY2019Q3	us-gaap	Dividends Cash DividendsCash	2016000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1727000	USD
CY2019Q3	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	3190000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	341000	USD
CY2019Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	398841000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	407690000	USD
	us-gaap	Profit Loss ProfitLoss	21781000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	493000	USD
	us-gaap	Dividends Cash DividendsCash	4782000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	712000	USD
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	5254000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	776000	USD
CY2020Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	421416000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	374621000	USD
	us-gaap	Profit Loss ProfitLoss	28534000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	543000	USD
	us-gaap	Dividends Cash DividendsCash	6030000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2694000	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	3190000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1669000	USD
CY2019Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	398841000	USD
	us-gaap	Profit Loss ProfitLoss	21781000	USD
	us-gaap	Profit Loss ProfitLoss	28534000	USD
	rbb	Depreciation And Amortization Of Premises And Equipment DepreciationAndAmortizationOfPremisesAndEquipment	1535000	USD
	rbb	Depreciation And Amortization Of Premises And Equipment DepreciationAndAmortizationOfPremisesAndEquipment	1451000	USD
	rbb	Net Accretion Of Securities Loans Deposits And Other NetAccretionOfSecuritiesLoansDepositsAndOther	2827000	USD
	rbb	Net Accretion Of Securities Loans Deposits And Other NetAccretionOfSecuritiesLoansDepositsAndOther	2537000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-56000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	147000	USD
	rbb	Amortization Of Investment In Affordable Housing Tax Credits AmortizationOfInvestmentInAffordableHousingTaxCredits	740000	USD
	rbb	Amortization Of Investment In Affordable Housing Tax Credits AmortizationOfInvestmentInAffordableHousingTaxCredits	675000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4141000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3637000	USD
	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	415000	USD
	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	0	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8815000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1731000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	493000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	543000	USD
	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-1441000	USD
	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-438000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	210000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	7000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3552000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	6131000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-0	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	11000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-0	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	6000	USD
	rbb	Increase Decrease In Cash Surrender Value Of Life Insurance IncreaseDecreaseInCashSurrenderValueOfLifeInsurance	576000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	954000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-438580000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-48430000	USD
	rbb	Increase Decrease In Demand Deposits And Savings Accounts IncreaseDecreaseInDemandDepositsAndSavingsAccounts	112096000	USD
	rbb	Increase Decrease In Demand Deposits And Savings Accounts IncreaseDecreaseInDemandDepositsAndSavingsAccounts	-77905000	USD
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	62544000	USD
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	185771000	USD
	rbb	Decrease In Shortterm Advances From Federal Home Loan Bank DecreaseInShorttermAdvancesFromFederalHomeLoanBank	-0	USD
	rbb	Decrease In Shortterm Advances From Federal Home Loan Bank DecreaseInShorttermAdvancesFromFederalHomeLoanBank	284500000	USD
	rbb	Increase In Long Term Advances From Federal Home Loan Bank IncreaseInLongTermAdvancesFromFederalHomeLoanBank	190000000	USD
	rbb	Increase In Long Term Advances From Federal Home Loan Bank IncreaseInLongTermAdvancesFromFederalHomeLoanBank	0	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	4782000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	6030000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	5254000	USD
	rbb	Increase Decrease In Cash Surrender Value Of Life Insurance IncreaseDecreaseInCashSurrenderValueOfLifeInsurance	580000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	82051000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	102887000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	141226000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	347623000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-8414000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-4469000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	80131000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	266981000	USD
	rbb	Increase Decrease In Interestearning Deposits IncreaseDecreaseInInterestearningDeposits	0	USD
	rbb	Increase Decrease In Interestearning Deposits IncreaseDecreaseInInterestearningDeposits	-349000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	499116000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	112656000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	400844000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	109977000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	11661000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	6136000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	745000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	1205000	USD
	rbb	Proceeds From Redemption Of Federal Home Loan Bank Stock ProceedsFromRedemptionOfFederalHomeLoanBankStock	0	USD
	rbb	Proceeds From Redemption Of Federal Home Loan Bank Stock ProceedsFromRedemptionOfFederalHomeLoanBankStock	1751000	USD
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	95000	USD
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	8641000	USD
	rbb	Purchase Of Investment In Qualified Affordable Housing Projects PurchaseOfInvestmentInQualifiedAffordableHousingProjects	2230000	USD
	rbb	Purchase Of Investment In Qualified Affordable Housing Projects PurchaseOfInvestmentInQualifiedAffordableHousingProjects	-0	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	356142000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	45735000	USD
	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	0	USD
	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	819000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-6634000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-0	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	17000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	881000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3190000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	712000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	2694000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	355316000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-183160000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-3133000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	35391000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	181763000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	147685000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	178630000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	183076000	USD
	us-gaap	Interest Paid Net InterestPaidNet	26911000	USD
	us-gaap	Interest Paid Net InterestPaidNet	24600000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	9645000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	13010000	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	0	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	974000	USD
	rbb	Transfer From Transfer To Loans Held For Sale Net TransferFromTransferToLoansHeldForSaleNet	-28685000	USD
	rbb	Transfer From Transfer To Loans Held For Sale Net TransferFromTransferToLoansHeldForSaleNet	63422000	USD
	rbb	Loan To Facilitate Other Real Estate Owned LoanToFacilitateOtherRealEstateOwned	1015000	USD
	rbb	Loan To Facilitate Other Real Estate Owned LoanToFacilitateOtherRealEstateOwned	0	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	776000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1669000	USD
	rbb	Additions To Servicing Asset AdditionsToServicingAsset	1125000	USD
	rbb	Additions To Servicing Asset AdditionsToServicingAsset	2290000	USD
	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	183281000	USD
	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	0	USD
	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	200210000	USD
	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	0	USD
	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	32885000	USD
	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	0	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	10680000	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
	us-gaap	Nature Of Operations NatureOfOperations	<p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"><b>NOTE <em style="font: inherit;">1</em> - BUSINESS DESCRIPTION</b></p> <p style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;"> </p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;text-indent:24.5pt;">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', Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;"> </p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;text-indent:24.5pt;">At <em style="font: inherit;"> September </em><em style="font: inherit;">30,</em> <em style="font: inherit;">2020,</em> the Company had total consolidated assets of $3.4 billion, gross consolidated loans (held for investment and held for sale) of $2.8 billion, total consolidated deposits of $2.6 billion and total consolidated stockholders' equity of $421.4 million. RBB’s common stock trades on the Nasdaq Global Select Market under the symbol “RBB”.</p> <p style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;"> </p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;text-indent:24.5pt;">The Bank provides business banking services to the Chinese-American communities in Los Angeles County, Orange County, Ventura County, Las Vegas, the New York City metropolitan area and the Chicago metropolitan area, including remote deposit, E-banking, mobile banking, commercial and investor real estate loans, business loans and lines of credit, Small Business Administration (“SBA”) <em style="font: inherit;">7A</em> and <em style="font: inherit;">504</em> loans, mortgage loans, trade finance and a full range of depository accounts.</p> <p style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;"> </p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;text-indent:24.5pt;">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; and the Bridgeport and Chinatown areas of Chicago, Illinois. 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', Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;"> </p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;text-indent:24.5pt;">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, residential mortgage loan originations, loan servicing, gain on sales of loans and wealth management services. The Company’s principal 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', Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;"> </p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;text-indent:24.5pt;">The Company has completed six acquisitions from <em style="font: inherit;"> July 8, 2011 </em>through <em style="font: inherit;"> January 10, 2020, </em>including the acquisition of PGB Holdings Inc. (“PGBH”) and its wholly-owned subsidiary, Pacific Global Bank (“PGB”), which closed on <em style="font: inherit;"> January 10, 2020. </em>PGB operated three branches in Chicago. 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', Times, serif;font-size:10pt;margin:0pt;text-align:justify;text-indent:24.5pt;"> </p> <p style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;"> </p>
CY2020Q3	us-gaap	Assets Assets	3400000000	USD
CY2020Q3	rbb	Loans Held For Investment And Held For Sale Gross LoansHeldForInvestmentAndHeldForSaleGross	2800000000	USD
CY2020Q3	us-gaap	Deposits Deposits	2600000000	USD
CY2020Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	421400000	USD
	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	6	pure
	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"><span style="text-decoration: underline; ">Use of Estimates in the Preparation of Financial Statements</span></p> <p style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;"> </p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;text-indent:24.5pt;">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> <p style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;"> </p>
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	2737000	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	200595000	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
CY2020Q3	rbb	Percentage Of Gross Loans With Libo Rr Based Reference Rate PercentageOfGrossLoansWithLIBORrBasedReferenceRate	0.15	pure
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 Investments Held To Maturity BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInvestmentsHeldToMaturity	0	USD
CY2020Q1	rbb	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Investments Available For Sale BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInvestmentsAvailableForSale	0	USD
CY2020Q1	rbb	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Mortgage Loans Held For Sale BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedMortgageLoansHeldForSale	0	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 Mortgage Servicing Rights BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedMortgageServicingRights	0	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	1493000	USD
CY2020Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	222800000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	213221000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1616000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	175000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	214662000	USD
CY2020Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	7569000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	413000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2020Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7982000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	125729000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	435000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	95000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	126069000	USD
CY2019Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	8332000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	300000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2019Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	8632000	USD
CY2020Q3	us-gaap	Security Owned And Pledged As Collateral Fair Value SecurityOwnedAndPledgedAsCollateralFairValue	418000	USD
CY2019Q4	us-gaap	Security Owned And Pledged As Collateral Fair Value SecurityOwnedAndPledgedAsCollateralFairValue	627000	USD
CY2020Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	3800000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	11700000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	52000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	210000	USD
CY2019Q3	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	7000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	114199000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	114233000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	44937000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	45737000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	48462000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	49107000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	5623000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	5585000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	213221000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	214662000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	979000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	998000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	1818000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	1955000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	874000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	922000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	3898000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	4107000	USD
CY2020Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	7569000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7982000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	74577000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	74598000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	26622000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	26629000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	20518000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	20812000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	4012000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	4030000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	125729000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	126069000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	285000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	289000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	2756000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	2824000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	870000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	958000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	4421000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	4561000	USD
CY2019Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	8332000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	8632000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	175000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	46803000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	15	pure
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	0	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	0	pure
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	175000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	46803000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	15	pure
CY2020Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	0	USD
CY2020Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	0	USD
CY2020Q3	rbb	Debt Securities Heldtomaturity Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesHeldtomaturityContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	0	pure
CY2020Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2020Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	0	USD
CY2020Q3	rbb	Debt Securities Heldtomaturity Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesHeldtomaturityContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	0	pure
CY2020Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	0	USD
CY2020Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	0	USD
CY2020Q3	rbb	Debt Securities Heldtomaturity Unrealized Loss Position Number Of Positions DebtSecuritiesHeldtomaturityUnrealizedLossPositionNumberOfPositions	0	pure
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	56000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	11410000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	11	pure
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	39000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	4865000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	8	pure
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	95000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	16275000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	19	pure
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	0	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	0	USD
CY2019Q4	rbb	Debt Securities Heldtomaturity Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesHeldtomaturityContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	0	pure
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	0	USD
CY2019Q4	rbb	Debt Securities Heldtomaturity Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesHeldtomaturityContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	0	pure
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	0	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	0	USD
CY2019Q4	rbb	Debt Securities Heldtomaturity Unrealized Loss Position Number Of Positions DebtSecuritiesHeldtomaturityUnrealizedLossPositionNumberOfPositions	0	pure
CY2020Q3	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	0	USD
	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	147000	USD
CY2020Q3	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	11900000	USD
CY2020Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	22820000	USD
CY2019Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	18561000	USD
CY2020Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	3861000	USD
CY2019Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	824000	USD
CY2020Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	48000	USD
CY2019Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	-0	USD
CY2020Q3	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1000	USD
CY2019Q3	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	26634000	USD
CY2019Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	19386000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	18816000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	17577000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8815000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1731000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	998000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	-110000	USD
	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1000	USD
	rbb	Allowance For Loan And Lease Loss Recovery Reversal Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryReversalOfBadDebts	32000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	26634000	USD
CY2019Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	19386000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	17577000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2390000	USD
CY2019	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	1259000	USD
CY2019	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	108000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	18816000	USD
CY2020Q3	rbb	Allowance For Credit Losses Reserve Change In Method Of Calculating Impairment AllowanceForCreditLossesReserveChangeInMethodOfCalculatingImpairment	26634000	USD
CY2020Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	17976000	USD
CY2020Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2737177000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2755153000	USD
CY2019Q3	rbb	Allowance For Credit Losses Reserve Change In Method Of Calculating Impairment AllowanceForCreditLossesReserveChangeInMethodOfCalculatingImpairment	19386000	USD
CY2019Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	9628000	USD
CY2019Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2116517000	USD
CY2019Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2126145000	USD
CY2019Q4	rbb	Allowance For Credit Losses Reserve Change In Method Of Calculating Impairment AllowanceForCreditLossesReserveChangeInMethodOfCalculatingImpairment	18816000	USD
CY2019Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	13218000	USD
CY2019Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2183716000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2196934000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2755153000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2196934000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	35922000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	2719231000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2755153000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	15993000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	15830000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	2181104000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2196934000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	11437000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	18159000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	17976000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	436000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	13234000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	13218000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	0	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	18643000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	21248000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	103000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	9771000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	222000	USD
CY2019Q4	rbb	Number Of Loans Identified As Troubled Debt Restructurings NumberOfLoansIdentifiedAsTroubledDebtRestructurings	4	pure
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	33000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	9754000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	176000	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	3.1	USD
CY2019Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	1800000	USD
CY2020Q3	rbb	Financing Receivable Nonaccrual Troubled Debt Restructuring FinancingReceivableNonaccrualTroubledDebtRestructuring	1.1	USD
CY2019Q4	rbb	Financing Receivable Nonaccrual Troubled Debt Restructuring FinancingReceivableNonaccrualTroubledDebtRestructuring	0	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	1719000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	3	pure
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	1719000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	1719000	USD
	rbb	Loan Servicing Fees Net Of Amortization LoanServicingFeesNetOfAmortization	1800000	USD
CY2019Q3	rbb	Loan Servicing Fees Net Of Amortization LoanServicingFeesNetOfAmortization	827000	USD
	rbb	Loan Servicing Fees Net Of Amortization LoanServicingFeesNetOfAmortization	2600000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	69200000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	58600000	USD
CY2019Q4	us-gaap	Finite Lived Core Deposits Gross FiniteLivedCoreDepositsGross	6100000	USD
CY2020Q3	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	1232580000	USD
CY2020Q3	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	70341000	USD
CY2020Q3	rbb	Time Deposit Maturities Over Three Years TimeDepositMaturitiesOverThreeYears	12117000	USD
CY2020Q3	us-gaap	Time Deposits TimeDeposits	1315038000	USD
CY2020Q3	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	105000000	USD
CY2019Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	105000000	USD
CY2020Q3	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	695000	USD
CY2019Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	951000	USD
CY2020Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	1662000	USD
CY2019Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	1662000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	4987000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	4987000	USD
CY2020Q3	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	85000	USD
CY2019Q3	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	85000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	256000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	256000	USD
CY2019Q3	rbb	Debt Amortization Expense DebtAmortizationExpense	42000	USD
	rbb	Debt Amortization Expense DebtAmortizationExpense	164000	USD
	rbb	Debt Amortization Expense DebtAmortizationExpense	125000	USD
CY2020Q3	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3700000	USD
CY2019Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.315	pure
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9800000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12000000.0	USD
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.310	pure
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.295	pure
CY2020Q2	rbb	Employee Service Share Based Compensation Tax Charge Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxChargeBenefitFromExerciseOfStockOptions	0	USD
CY2019Q3	rbb	Employee Service Share Based Compensation Tax Charge Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxChargeBenefitFromExerciseOfStockOptions	38000	USD
	rbb	Employee Service Share Based Compensation Tax Charge Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxChargeBenefitFromExerciseOfStockOptions	26000	USD
	rbb	Employee Service Share Based Compensation Tax Charge Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxChargeBenefitFromExerciseOfStockOptions	78000	USD
CY2020Q3	us-gaap	Operating Leases Future Minimum Payments Remainder Of Fiscal Year OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear	1464000	USD
CY2020Q3	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	5181000	USD
CY2020Q3	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	4727000	USD
CY2020Q3	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	3778000	USD
CY2020Q3	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	2693000	USD
CY2020Q3	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	12032000	USD
CY2020Q3	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	29875000	USD
CY2020Q3	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	1400000	USD
CY2019Q3	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	1600000	USD
	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	4300000	USD
	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	4600000	USD
CY2020Q3	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	82000	USD
CY2019Q3	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	49000	USD
	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	263000	USD
	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	148000	USD
CY2020Q3	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Face Amount Liability FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability	451521000	USD
CY2019Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Face Amount Liability FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability	330199000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	4000000	USD
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	12.73
CY2018Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	3600000	USD
	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	7376000	USD
CY2019	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	16180000	USD
	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	11376000	USD
CY2019	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	15780000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	0	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	4000000	USD
CY2020Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	167000	USD
CY2019Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	147000	USD
CY2020Q3	rbb	Employee Service Share Based Compensation Tax Expense From Compensation Expense EmployeeServiceShareBasedCompensationTaxExpenseFromCompensationExpense	0	USD
CY2019Q3	rbb	Employee Service Share Based Compensation Tax Expense From Compensation Expense EmployeeServiceShareBasedCompensationTaxExpenseFromCompensationExpense	38000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	494000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	543000	USD
	rbb	Employee Service Share Based Compensation Tax Expense From Compensation Expense EmployeeServiceShareBasedCompensationTaxExpenseFromCompensationExpense	26000	USD
	rbb	Employee Service Share Based Compensation Tax Expense From Compensation Expense EmployeeServiceShareBasedCompensationTaxExpenseFromCompensationExpense	78000	USD
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.285	pure
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.350	pure
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0199	pure
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0190	pure
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0131	pure
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0266	pure
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	4.61
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	6.32
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1090968
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.11
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	51000
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	20.10
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	56498
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	12.61
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	36000
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	18.32
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1049470
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.30
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	189917000	USD
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	958470
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19717568
CY2020Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	189917000	USD
CY2020Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	393000	USD
	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y8M12D
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	221000	USD
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	484000	USD
CY2020Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	90000
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	76500
CY2020Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	5.35
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	6.32
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	56498
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	712000	USD
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	200629
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	2800000	USD
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	389000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	1200000	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
	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
CY2020Q3	rbb	Required Assets To Liabilities Ratio After Dividend Effect RequiredAssetsToLiabilitiesRatioAfterDividendEffect	1.25	pure
CY2019Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	126069000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	8520000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	8012000	USD
CY2020Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	-9000	USD
CY2019Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	0	USD
CY2020Q3	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	19739280
CY2019Q3	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	20030866
CY2020Q3	rbb	Weighted Average Number Of Shares Impact WeightedAverageNumberOfSharesImpact	-21713
CY2019Q3	rbb	Weighted Average Number Of Shares Impact WeightedAverageNumberOfSharesImpact	36981
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	8511000	USD
CY2019Q3	us-gaap	Noninterest Income NoninterestIncome	2799000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	8012000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20067847
CY2020Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	87324
CY2019Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	358119
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	8511000	USD
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19804892
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	8012000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20425966
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.43
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.40
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.43
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.39
	us-gaap	Net Income Loss NetIncomeLoss	21781000	USD
	us-gaap	Net Income Loss NetIncomeLoss	28534000	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	-29000	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic		USD
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	19739280
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	20030866
	rbb	Weighted Average Number Of Shares Impact WeightedAverageNumberOfSharesImpact	60337
	rbb	Weighted Average Number Of Shares Impact WeightedAverageNumberOfSharesImpact	32613
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	21752000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19799617
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	28534000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20063479
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	158994
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	372388
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	21752000	USD
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19958612
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	28534000	USD
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20435867
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.10
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.42
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.09
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.40
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1073000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	894000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3160000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2869000	USD
CY2020Q3	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	1654000	USD
CY2019Q3	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	1905000	USD
	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	6390000	USD
	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	9628000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	2727000	USD
	us-gaap	Noninterest Income NoninterestIncome	9550000	USD
CY2020Q3	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	247000	USD
	us-gaap	Noninterest Income NoninterestIncome	12497000	USD
CY2019Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	4200000	USD
CY2019Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	8600000	USD
CY2020Q3	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	2000000.0	USD
CY2019Q3	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	225000	USD
	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	740000	USD
	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	675000	USD

Files In Submission

Name	View Source	Status
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0001437749-20-023147-index.html	Edgar Link	pending
0001437749-20-023147.txt	Edgar Link	pending
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2020 Q4 Form 10-Q Financial Statement

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2020 Q4 Form 10-Q Financial Statement

#000143774920023147 Filed on November 09, 2020

Income Statement

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RBB Bancorp Stock $rbb