$UBFO
UNITED SECURITY BANCSHARES Stock $ubfo

$ubfo Overview Financials Valuation SEC Filings Company Website

2022 Q3 Form 10-Q Financial Statement

#000113754722000032 Filed on August 05, 2022

Income Statement

Concept	2022 Q3	2022 Q2	2022 Q1
Revenue	$899.0K	$10.99M	$9.991M
YoY Change	-90.9%	16.4%	17.27%
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	$338.0K	$316.0K	$311.0K
YoY Change	-6.11%	-7.06%	-13.61%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$789.0K	$584.0K	$553.0K
YoY Change	46.11%	13.84%	16.91%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$6.304M	$4.829M	$3.411M
YoY Change	72.71%	27.68%	75.1%
Income Tax	$1.837M	$1.394M	$968.0K
% Of Pretax Income	29.14%	28.87%	28.38%
Net Earnings	$4.467M	$3.435M	$2.443M
YoY Change	71.15%	26.99%	73.14%
Net Earnings / Revenue	496.89%	31.25%	24.45%
Basic Earnings Per Share	$0.26	$0.20	$0.14
Diluted Earnings Per Share	$261.8K	$0.20	$0.14
COMMON SHARES
Basic Shares Outstanding	17.04M shares	17.04M shares	17.03M shares
Diluted Shares Outstanding	17.06M shares	17.06M shares	17.05M shares

Balance Sheet

Concept	2022 Q3	2022 Q2	2022 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$126.0M	$107.2M	$224.9M
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	$10.60M	$11.36M	$11.36M
YoY Change	-10.92%	-1.23%	-2.04%
Goodwill	$4.488M	$4.488M	$4.488M
YoY Change	-0.27%	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$11.96M	$9.428M	$6.974M
YoY Change	285.68%	204.13%	117.94%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.369B	$1.340B	$1.350B
YoY Change	5.92%	8.81%	13.72%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$2.245M	$2.401M	$2.554M
YoY Change	-22.59%	-11.07%	-8.79%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$2.245M	$2.401M	$2.554M
YoY Change	-22.59%	-11.07%	-8.79%
LONG-TERM LIABILITIES
Long-Term Debt	$10.31M	$10.49M	$10.89M
YoY Change	-8.81%	-7.18%	-1.03%
Other Long-Term Liabilities	$8.805M	$8.432M	$8.455M
YoY Change	0.06%	1.59%	5.69%
Total Long-Term Liabilities	$19.11M	$18.92M	$19.34M
YoY Change	-4.93%	-3.46%	1.8%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.245M	$2.401M	$2.554M
Total Long-Term Liabilities	$19.11M	$18.92M	$19.34M
Total Liabilities	$1.262B	$1.230B	$1.236B
YoY Change	7.54%	10.5%	15.58%
SHAREHOLDERS EQUITY
Retained Earnings	$66.47M	$63.87M	$62.31M
YoY Change	10.32%	7.34%	6.2%
Common Stock	$59.92M	$59.84M	$59.74M
YoY Change	0.63%	0.57%	0.49%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$107.1M	$110.0M	$113.6M
YoY Change
Total Liabilities & Shareholders Equity	$1.369B	$1.340B	$1.350B
YoY Change	5.92%	8.81%	13.72%

Cashflow Statement

Concept	2022 Q3	2022 Q2	2022 Q1
OPERATING ACTIVITIES
Net Income	$4.467M	$3.435M	$2.443M
YoY Change	71.15%	26.99%	73.14%
Depreciation, Depletion And Amortization	$338.0K	$316.0K	$311.0K
YoY Change	-6.11%	-7.06%	-13.61%
Cash From Operating Activities	$7.248M	$5.524M	$2.255M
YoY Change	140.0%	349.11%	-51.25%
INVESTING ACTIVITIES
Capital Expenditures	-$754.0K	-$465.0K	$281.0K
YoY Change	27.8%	40.91%	96.5%
Acquisitions
YoY Change
Other Investing Activities	-$18.46M	-$114.7M	-$20.61M
YoY Change	-148.98%	-39.19%	-75.43%
Cash From Investing Activities	-$19.21M	-$115.2M	-$20.89M
YoY Change	-151.79%	-39.05%	-75.14%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	30.75M	-8.013M	$24.35M
YoY Change	-47.36%	-119.65%	-73.89%
NET CHANGE
Cash From Operating Activities	7.248M	5.524M	$2.255M
Cash From Investing Activities	-19.21M	-115.2M	-$20.89M
Cash From Financing Activities	30.75M	-8.013M	$24.35M
Net Change In Cash	18.79M	-117.7M	$5.715M
YoY Change	-80.93%	-19.94%	-58.71%
FREE CASH FLOW
Cash From Operating Activities	$7.248M	$5.524M	$2.255M
Capital Expenditures	-$754.0K	-$465.0K	$281.0K
Free Cash Flow	$8.002M	$5.989M	$1.974M
YoY Change	121.66%	283.91%	-55.97%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Central Index Key EntityCentralIndexKey	0001137547
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2022-06-30
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	0	usd
CY2022Q2	us-gaap	Trading Securities TradingSecurities	0	usd
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	000-32897
	dei	Entity Registrant Name EntityRegistrantName	UNITED SECURITY BANCSHARES
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	91-2112732
	dei	Entity Address Address Line1 EntityAddressAddressLine1	2126 Inyo Street
	dei	Entity Address City Or Town EntityAddressCityOrTown	Fresno
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	CA
	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	93721
	dei	City Area Code CityAreaCode	559
	dei	Local Phone Number LocalPhoneNumber	248-4943
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	true
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2022Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	17040549	shares
CY2022Q2	us-gaap	Cash And Due From Banks CashAndDueFromBanks	33701000	usd
	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	340000	usd
CY2021Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	31057000	usd
CY2022Q2	ubfo	Due From Frb Interest Bearing Cash DueFromFrbInterestBearingCash	73545000	usd
CY2021Q4	ubfo	Due From Frb Interest Bearing Cash DueFromFrbInterestBearingCash	188162000	usd
CY2022Q2	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	107246000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	219219000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	212338000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	178902000	usd
CY2022Q2	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	3436000	usd
CY2021Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	3744000	usd
CY2022Q2	us-gaap	Short Term Investments ShortTermInvestments	215774000	usd
CY2021Q4	us-gaap	Short Term Investments ShortTermInvestments	182646000	usd
CY2022Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	948031000	usd
CY2021Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	869314000	usd
CY2022Q2	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	1960000	usd
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CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9907000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9333000	usd
CY2022Q2	us-gaap	Notes Receivable Net NotesReceivableNet	940084000	usd
CY2021Q4	us-gaap	Notes Receivable Net NotesReceivableNet	862200000	usd
CY2022Q2	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	9069000	usd
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	8950000	usd
CY2022Q2	us-gaap	Interest Receivable InterestReceivable	8265000	usd
CY2021Q4	us-gaap	Interest Receivable InterestReceivable	7530000	usd
CY2022Q2	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	4582000	usd
CY2021Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	4582000	usd
CY2022Q2	us-gaap	Goodwill Goodwill	4488000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	4488000	usd
CY2022Q2	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	9428000	usd
CY2021Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	3615000	usd
CY2022Q2	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	22591000	usd
CY2021Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	22338000	usd
CY2022Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2290000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2594000	usd
CY2022Q2	us-gaap	Other Assets OtherAssets	15700000	usd
CY2021Q4	us-gaap	Other Assets OtherAssets	12782000	usd
CY2022Q2	us-gaap	Assets Assets	1339517000	usd
CY2021Q4	us-gaap	Assets Assets	1330944000	usd
CY2022Q2	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	473013000	usd
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	476749000	usd
CY2022Q2	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	735181000	usd
CY2021Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	711357000	usd
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CY2021Q4	us-gaap	Deposits Deposits	1188106000	usd
CY2022Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	2401000	usd
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	2705000	usd
CY2022Q2	us-gaap	Accounts Payable And Other Accrued Liabilities AccountsPayableAndOtherAccruedLiabilities	8432000	usd
CY2021Q4	us-gaap	Accounts Payable And Other Accrued Liabilities AccountsPayableAndOtherAccruedLiabilities	8737000	usd
CY2022Q2	us-gaap	Subordinated Debt SubordinatedDebt	10489000	usd
CY2021Q4	us-gaap	Subordinated Debt SubordinatedDebt	11189000	usd
CY2022Q2	us-gaap	Liabilities Liabilities	1229516000	usd
CY2021Q4	us-gaap	Liabilities Liabilities	1210737000	usd
CY2022Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0
CY2022Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	20000000	shares
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	20000000	shares
CY2022Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	17040549	shares
CY2022Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	17040549	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	17028239	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	17028239	shares
CY2022Q2	us-gaap	Common Stock Value CommonStockValue	59836000	usd
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	59636000	usd
CY2022Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	63874000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	61745000	usd
CY2022Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-13709000	usd
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1174000	usd
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	110001000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	120207000	usd
CY2022Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1339517000	usd
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1330944000	usd
CY2022Q2	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	9731000	usd
CY2021Q2	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	8748000	usd
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	18849000	usd
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	16855000	usd
CY2022Q2	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	1004000	usd
CY2021Q2	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	654000	usd
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	1795000	usd
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	1041000	usd
CY2022Q2	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	258000	usd
CY2021Q2	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	42000	usd
	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	104000	usd
CY2022Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10993000	usd
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	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	20984000	usd
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	18000000	usd
CY2022Q2	us-gaap	Interest Expense Deposits InterestExpenseDeposits	515000	usd
CY2021Q2	us-gaap	Interest Expense Deposits InterestExpenseDeposits	468000	usd
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1023000	usd
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	895000	usd
CY2022Q2	us-gaap	Interest Expense Loans From Other Federal Home Loan Banks InterestExpenseLoansFromOtherFederalHomeLoanBanks	69000	usd
CY2021Q2	us-gaap	Interest Expense Loans From Other Federal Home Loan Banks InterestExpenseLoansFromOtherFederalHomeLoanBanks	45000	usd
	us-gaap	Interest Expense Loans From Other Federal Home Loan Banks InterestExpenseLoansFromOtherFederalHomeLoanBanks	114000	usd
	us-gaap	Interest Expense Loans From Other Federal Home Loan Banks InterestExpenseLoansFromOtherFederalHomeLoanBanks	92000	usd
CY2022Q2	us-gaap	Interest Expense InterestExpense	584000	usd
CY2021Q2	us-gaap	Interest Expense InterestExpense	513000	usd
	us-gaap	Interest Expense InterestExpense	1137000	usd
	us-gaap	Interest Expense InterestExpense	987000	usd
CY2022Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	10409000	usd
CY2021Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8931000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	19847000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	17013000	usd
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	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	611000	usd
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1201000	usd
CY2022Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	9803000	usd
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	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	15812000	usd
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	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1429000	usd
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1348000	usd
CY2022Q2	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	114000	usd
CY2021Q2	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	138000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	253000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	269000	usd
CY2022Q2	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-127000	usd
CY2021Q2	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	0	usd
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-309000	usd
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-60000	usd
CY2022Q2	ubfo	Gain Losson Fair Value Optionof Financial Liability GainLossonFairValueOptionofFinancialLiability	-869000	usd
CY2021Q2	ubfo	Gain Losson Fair Value Optionof Financial Liability GainLossonFairValueOptionofFinancialLiability	377000	usd
	ubfo	Gain Losson Fair Value Optionof Financial Liability GainLossonFairValueOptionofFinancialLiability	-1869000	usd
	ubfo	Gain Losson Fair Value Optionof Financial Liability GainLossonFairValueOptionofFinancialLiability	-656000	usd
CY2022Q2	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	0	usd
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	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	30000	usd
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CY2022Q2	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	usd
CY2021Q2	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	usd
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	usd
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	13000	usd
CY2022Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	708000	usd
CY2021Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	115000	usd
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	861000	usd
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	248000	usd
CY2022Q2	us-gaap	Noninterest Income NoninterestIncome	602000	usd
CY2021Q2	us-gaap	Noninterest Income NoninterestIncome	1322000	usd
	us-gaap	Noninterest Income NoninterestIncome	395000	usd
	us-gaap	Noninterest Income NoninterestIncome	1162000	usd
CY2022Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	2777000	usd
CY2021Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	2893000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	5826000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	5917000	usd
CY2022Q2	us-gaap	Occupancy Net OccupancyNet	849000	usd
CY2021Q2	us-gaap	Occupancy Net OccupancyNet	837000	usd
	us-gaap	Occupancy Net OccupancyNet	1628000	usd
	us-gaap	Occupancy Net OccupancyNet	1693000	usd
CY2022Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	145000	usd
CY2021Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	148000	usd
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	260000	usd
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	235000	usd
CY2022Q2	us-gaap	Professional Fees ProfessionalFees	919000	usd
CY2021Q2	us-gaap	Professional Fees ProfessionalFees	905000	usd
	us-gaap	Professional Fees ProfessionalFees	1868000	usd
	us-gaap	Professional Fees ProfessionalFees	1766000	usd
CY2022Q2	ubfo	Regulatory Assessments Expense Benefit RegulatoryAssessmentsExpenseBenefit	187000	usd
CY2021Q2	ubfo	Regulatory Assessments Expense Benefit RegulatoryAssessmentsExpenseBenefit	123000	usd
	ubfo	Regulatory Assessments Expense Benefit RegulatoryAssessmentsExpenseBenefit	417000	usd
	ubfo	Regulatory Assessments Expense Benefit RegulatoryAssessmentsExpenseBenefit	289000	usd
CY2022Q2	us-gaap	Noninterest Expense Directors Fees NoninterestExpenseDirectorsFees	116000	usd
CY2021Q2	us-gaap	Noninterest Expense Directors Fees NoninterestExpenseDirectorsFees	92000	usd
	us-gaap	Noninterest Expense Directors Fees NoninterestExpenseDirectorsFees	234000	usd
	us-gaap	Noninterest Expense Directors Fees NoninterestExpenseDirectorsFees	184000	usd
CY2022Q2	ubfo	Correspondent Bank Service Charges CorrespondentBankServiceCharges	24000	usd
CY2021Q2	ubfo	Correspondent Bank Service Charges CorrespondentBankServiceCharges	23000	usd
	ubfo	Correspondent Bank Service Charges CorrespondentBankServiceCharges	50000	usd
	ubfo	Correspondent Bank Service Charges CorrespondentBankServiceCharges	42000	usd
CY2022Q2	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-2000	usd
CY2021Q2	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-18000	usd
	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	6000	usd
	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-43000	usd
CY2022Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	557000	usd
CY2021Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	606000	usd
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1114000	usd
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1077000	usd
CY2022Q2	us-gaap	Noninterest Expense NoninterestExpense	5576000	usd
CY2021Q2	us-gaap	Noninterest Expense NoninterestExpense	5645000	usd
	us-gaap	Noninterest Expense NoninterestExpense	11391000	usd
	us-gaap	Noninterest Expense NoninterestExpense	11246000	usd
CY2022Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	4829000	usd
CY2021Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3782000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	8240000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5728000	usd
CY2022Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1394000	usd
CY2021Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1077000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2362000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1613000	usd
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	3435000	usd
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	2705000	usd
	us-gaap	Net Income Loss NetIncomeLoss	5878000	usd
	us-gaap	Net Income Loss NetIncomeLoss	4115000	usd
CY2022Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2021Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.35
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.24
CY2022Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2021Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.16
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.34
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.24
CY2022Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17036364	shares
CY2021Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17010288	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17033401	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17010210	shares
CY2022Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17057755	shares
CY2021Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17032878	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17054742	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17027477	shares
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	3435000	usd
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	2705000	usd
	us-gaap	Net Income Loss NetIncomeLoss	5878000	usd
	us-gaap	Net Income Loss NetIncomeLoss	4115000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-8744000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	827000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-20433000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-247000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	20000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	26000	usd
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	44000	usd
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	50000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	1292000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-647000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	2594000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	325000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-7432000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	206000	usd
	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-17795000	usd
	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	128000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-2585000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	245000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-6040000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-72000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	6000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	8000	usd
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	13000	usd
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	15000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	382000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	-192000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	767000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	95000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-5235000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	145000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-12535000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	90000	usd
CY2022Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-1800000	usd
CY2021Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2850000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-6657000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4205000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	117807000	usd
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	11924	shares
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-55000	usd
CY2021Q1	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.11
CY2021Q1	us-gaap	Dividends Common Stock DividendsCommonStock	1876000	usd
CY2021Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	46000	usd
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	1411000	usd
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	117333000	usd
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	41424	shares
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	145000	usd
CY2021Q2	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.11
CY2021Q2	us-gaap	Dividends Common Stock DividendsCommonStock	1870000	usd
CY2021Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	53000	usd
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	2705000	usd
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	118366000	usd
CY2021Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	41424	shares
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-30000	usd
CY2021Q3	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.11
CY2021Q3	us-gaap	Dividends Common Stock DividendsCommonStock	1871000	usd
CY2021Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	53000	usd
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	2610000	usd
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	119128000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	2443000	usd
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	41424	shares
CY2021Q4	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-506000	usd
CY2021Q4	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.11
CY2021Q4	us-gaap	Dividends Common Stock DividendsCommonStock	1872000	usd
CY2021Q4	ubfo	Stockholders Equity Tax Benefit From Restricted Stock Units Released StockholdersEquityTaxBenefitFromRestrictedStockUnitsReleased	10000	usd
CY2021Q4	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	44000	usd
CY2021Q4	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	53000	usd
CY2021Q4	us-gaap	Net Income Loss NetIncomeLoss	3370000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	120207000	usd
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	27949	shares
CY2022Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-7300000	usd
CY2022Q1	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.11
CY2022Q1	us-gaap	Dividends Common Stock DividendsCommonStock	1874000	usd
CY2022Q1	ubfo	Stockholders Equity Tax Benefit From Restricted Stock Units Released StockholdersEquityTaxBenefitFromRestrictedStockUnitsReleased	1000	usd
CY2022Q1	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	48000	usd
CY2022Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	53000	usd
CY2022Q1	us-gaap	Stockholders Equity StockholdersEquity	113576000	usd
CY2022Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	26949	shares
CY2022Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-5235000	usd
CY2022Q2	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.11
CY2022Q2	us-gaap	Dividends Common Stock DividendsCommonStock	1875000	usd
CY2022Q2	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	47000	usd
CY2022Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	53000	usd
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	3435000	usd
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	110001000	usd
CY2022Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	26949	shares
	us-gaap	Net Income Loss NetIncomeLoss	5878000	usd
	us-gaap	Net Income Loss NetIncomeLoss	4115000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	611000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1201000	usd
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	627000	usd
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	702000	usd
	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	-303000	usd
	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	-260000	usd
	ubfo	Amortizationof Investment Securities AmortizationofInvestmentSecurities	348000	usd
	ubfo	Amortizationof Investment Securities AmortizationofInvestmentSecurities	481000	usd
	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	30000	usd
	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	0	usd
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	735000	usd
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	436000	usd
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	2000	usd
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-3000	usd
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-227000	usd
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	34000	usd
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	237000	usd
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-2010000	usd
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	6000	usd
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	253000	usd
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-309000	usd
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-60000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	201000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	98000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	214000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-98000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	253000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	269000	usd
	ubfo	Gain Loss On Fair Value Of Financial Instruments Net Pretax GainLossOnFairValueOfFinancialInstrumentsNetPretax	-1869000	usd
	ubfo	Gain Loss On Fair Value Of Financial Instruments Net Pretax GainLossOnFairValueOfFinancialInstrumentsNetPretax	-656000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	963000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1839000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7779000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	5857000	usd
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	2428000	usd
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	8000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	81762000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	97325000	usd
	ubfo	Principal Paymentsof Availablefor Sale Securities PrincipalPaymentsofAvailableforSaleSecurities	11898000	usd
	ubfo	Principal Paymentsof Availablefor Sale Securities PrincipalPaymentsofAvailableforSaleSecurities	11964000	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	15676000	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
	us-gaap	Payments To Acquire Loans And Leases Held For Investment PaymentsToAcquireLoansAndLeasesHeldForInvestment	78731000	usd
	us-gaap	Payments To Acquire Loans And Leases Held For Investment PaymentsToAcquireLoansAndLeasesHeldForInvestment	186215000	usd
	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	0	usd
	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	251000	usd
	us-gaap	Payments To Acquire Limited Partnership Interests PaymentsToAcquireLimitedPartnershipInterests	0	usd
	us-gaap	Payments To Acquire Limited Partnership Interests PaymentsToAcquireLimitedPartnershipInterests	340000	usd
	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	0	usd
	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	920000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	746000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	469000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-136093000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-273062000	usd
	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	13743000	usd
	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	136210000	usd
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	6347000	usd
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	1581000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3749000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3747000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	16341000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	134044000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-111973000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-133161000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	219219000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	294069000	usd
CY2022Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	107246000	usd
CY2021Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	160908000	usd
CY2022Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	233104000	usd
CY2022Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	37000	usd
CY2022Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	20803000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	212338000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	179236000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	998000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1332000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	178902000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	0	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	0	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	34935000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	33755000	usd
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	66280000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	58897000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	14138000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	12049000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	117751000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	107637000	usd
CY2022Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	233104000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	212338000	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	15676000	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	78000	usd
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	usd
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	48000	usd
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	usd
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	usd
CY2021Q2	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	usd
CY2022Q2	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	174618000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	18047000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	21430000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	2756000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	196048000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	20803000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	90218000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1232000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	9950000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	100000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	100168000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1332000	usd
	ubfo	Number Of General Segments For The Segregation Of Portfolio NumberOfGeneralSegmentsForTheSegregationOfPortfolio	2	segment
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-309000	usd
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-60000	usd
CY2022Q2	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-127000	usd
CY2021Q2	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	0	usd
CY2022Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	0	usd
CY2021Q4	us-gaap	Trading Securities TradingSecurities	0	usd
CY2022Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	948031000	usd
CY2021Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	869314000	usd
CY2022Q2	ubfo	Financing Receivable Recorded Investments Past Due FinancingReceivableRecordedInvestmentsPastDue	14950000	usd
CY2022Q2	ubfo	Financing Receivable Recorded Investments Current FinancingReceivableRecordedInvestmentsCurrent	933081000	usd
CY2022Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	948031000	usd
CY2022Q2	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	109000	usd
CY2021Q4	ubfo	Financing Receivable Recorded Investments Past Due FinancingReceivableRecordedInvestmentsPastDue	18396000	usd
	ubfo	Lessee Financing Lease Number Of Contracts LesseeFinancingLeaseNumberOfContracts	0	contract
CY2021Q4	ubfo	Financing Receivable Recorded Investments Current FinancingReceivableRecordedInvestmentsCurrent	850918000	usd
CY2021Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	869314000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	453000	usd
	ubfo	Period Of Default Minimum PeriodOfDefaultMinimum	P90D
	ubfo	Period Of Default Minimum PeriodOfDefaultMinimum	P90D
	ubfo	Number Of Monthly Payments To Demonstrate Repayment Ability NumberOfMonthlyPaymentsToDemonstrateRepaymentAbility	6	payment
CY2021Q4	us-gaap	Financing Receivable Loan In Process FinancingReceivableLoanInProcess	0	usd
CY2022Q2	us-gaap	Financing Receivable Loan In Process FinancingReceivableLoanInProcess	0	usd
CY2022Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	11229000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	11438000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	11882000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	11580000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	304000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	11884000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	102000	usd
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	11954000	usd
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	143000	usd
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	2000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	12032000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	11679000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	355000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	12034000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	130000	usd
CY2021	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	12813000	usd
CY2021	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	319000	usd
CY2021	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	2000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	11914000	usd
CY2021Q2	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	12452000	usd
CY2021Q2	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	78000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	78000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	65000	usd
CY2021Q2	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	87000	usd
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	11954000	usd
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	13427000	usd
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	143000	usd
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	172000	usd
	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	129000	usd
	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	156000	usd
	ubfo	Financing Receivable Periodof Successful Payment History Usedfor Restructured Loan Accrual Status FinancingReceivablePeriodofSuccessfulPaymentHistoryUsedforRestructuredLoanAccrualStatus	P6M
CY2022Q2	ubfo	Number Of Restructured Loans NumberOfRestructuredLoans	4	loan
CY2022Q2	ubfo	Total Restructured Loans TotalRestructuredLoans	2400000	usd
CY2021Q4	ubfo	Number Of Restructured Loans NumberOfRestructuredLoans	5	loan
CY2021Q4	ubfo	Total Restructured Loans TotalRestructuredLoans	2600000	usd
CY2022Q1	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	2453000	usd
CY2022Q2	ubfo	Financing Receivable Modifications Additions FinancingReceivableModificationsAdditions	0	usd
CY2022Q2	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Principal Additions Reductions FinancingReceivablesImpairedTroubledDebtRestructuringPrincipalAdditionsReductions	102000	usd
CY2022Q2	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Credit Losses Write Offs FinancingReceivablesImpairedTroubledDebtRestructuringCreditLossesWriteOffs	0	usd
	ubfo	Lessee Operating Lease Number Of Contracts LesseeOperatingLeaseNumberOfContracts	15	contract
	ubfo	Financing Receivable Modifications Defaults FinancingReceivableModificationsDefaults	0	usd
CY2022Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	2351000	usd
CY2022Q2	ubfo	Financing Receivable Modification Allowance For Loan Losses FinancingReceivableModificationAllowanceForLoanLosses	102000	usd
CY2022Q2	ubfo	Financing Receivable Modifications Defaults FinancingReceivableModificationsDefaults	0	usd
CY2021Q1	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	3211000	usd
CY2021Q2	ubfo	Financing Receivable Modifications Additions FinancingReceivableModificationsAdditions	0	usd
CY2021Q2	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Principal Additions Reductions FinancingReceivablesImpairedTroubledDebtRestructuringPrincipalAdditionsReductions	138000	usd
CY2021Q2	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Credit Losses Write Offs FinancingReceivablesImpairedTroubledDebtRestructuringCreditLossesWriteOffs	0	usd
CY2021Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	3073000	usd
CY2021Q2	ubfo	Financing Receivable Modification Allowance For Loan Losses FinancingReceivableModificationAllowanceForLoanLosses	173000	usd
CY2021Q2	ubfo	Financing Receivable Modifications Defaults FinancingReceivableModificationsDefaults	0	usd
CY2021Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	2594000	usd
	ubfo	Financing Receivable Modifications Additions FinancingReceivableModificationsAdditions	0	usd
	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Principal Additions Reductions FinancingReceivablesImpairedTroubledDebtRestructuringPrincipalAdditionsReductions	243000	usd
	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Credit Losses Write Offs FinancingReceivablesImpairedTroubledDebtRestructuringCreditLossesWriteOffs	0	usd
CY2022Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	2351000	usd
CY2022Q2	ubfo	Financing Receivable Modification Allowance For Loan Losses FinancingReceivableModificationAllowanceForLoanLosses	102000	usd
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	3426000	usd
	ubfo	Financing Receivable Modifications Additions FinancingReceivableModificationsAdditions	0	usd
	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Principal Additions Reductions FinancingReceivablesImpairedTroubledDebtRestructuringPrincipalAdditionsReductions	353000	usd
	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Credit Losses Write Offs FinancingReceivablesImpairedTroubledDebtRestructuringCreditLossesWriteOffs	0	usd
CY2021Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	3073000	usd
CY2021Q2	ubfo	Financing Receivable Modification Allowance For Loan Losses FinancingReceivableModificationAllowanceForLoanLosses	173000	usd
	ubfo	Financing Receivable Modifications Defaults FinancingReceivableModificationsDefaults	0	usd
	ubfo	Number Of Risk Rating Approaches NumberOfRiskRatingApproaches	2	rating
	ubfo	Numberof Loan Portfolio Segment NumberofLoanPortfolioSegment	10	segment
CY2022Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9276000	usd
CY2022Q2	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-606000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	6000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	31000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	-25000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9907000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	102000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	9805000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9907000	usd
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8549000	usd
CY2021Q2	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-826000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	188000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	13000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	175000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9200000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	173000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	9027000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9200000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9333000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-611000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	364000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	327000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	37000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9907000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	102000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	9805000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9907000	usd
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8522000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-1201000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	580000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	57000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	523000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9200000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	173000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	9027000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9200000	usd
CY2022Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	11884000	usd
CY2022Q2	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	936147000	usd
CY2022Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	948031000	usd
CY2021Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	11834000	usd
CY2021Q2	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	829269000	usd
CY2021Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	841103000	usd
CY2022Q2	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	473013000	usd
CY2022Q2	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	473013000	usd
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	476749000	usd
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	476749000	usd
CY2022Q2	us-gaap	Deposits Money Market Deposits And Negotiable Order Of Withdrawal Now DepositsMoneyMarketDepositsAndNegotiableOrderOfWithdrawalNOW	541166000	usd
CY2022Q2	us-gaap	Deposits Money Market Deposits And Negotiable Order Of Withdrawal Now DepositsMoneyMarketDepositsAndNegotiableOrderOfWithdrawalNOW	541166000	usd
CY2021Q4	us-gaap	Deposits Money Market Deposits And Negotiable Order Of Withdrawal Now DepositsMoneyMarketDepositsAndNegotiableOrderOfWithdrawalNOW	529841000	usd
CY2021Q4	us-gaap	Deposits Money Market Deposits And Negotiable Order Of Withdrawal Now DepositsMoneyMarketDepositsAndNegotiableOrderOfWithdrawalNOW	529841000	usd
CY2022Q2	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	120082000	usd
CY2022Q2	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	120082000	usd
CY2021Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	113930000	usd
CY2021Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	113930000	usd
CY2022Q2	ubfo	Time Deposits Less Than250000 TimeDepositsLessThan250000	52762000	usd
CY2022Q2	ubfo	Time Deposits Less Than250000 TimeDepositsLessThan250000	52762000	usd
CY2021Q4	ubfo	Time Deposits Less Than250000 TimeDepositsLessThan250000	46631000	usd
CY2021Q4	ubfo	Time Deposits Less Than250000 TimeDepositsLessThan250000	46631000	usd
CY2022Q2	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	21171000	usd
CY2022Q2	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	21171000	usd
CY2021Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	20955000	usd
CY2021Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	20955000	usd
CY2022Q2	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	735181000	usd
CY2021Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	711357000	usd
CY2022Q2	us-gaap	Deposits Deposits	1208194000	usd
CY2021Q4	us-gaap	Deposits Deposits	1188106000	usd
CY2022Q2	us-gaap	Federal Home Loan Bank Advances Current FederalHomeLoanBankAdvancesCurrent	0	usd
CY2021Q4	us-gaap	Federal Home Loan Bank Advances Current FederalHomeLoanBankAdvancesCurrent	0	usd
CY2022Q2	us-gaap	Operating Lease Cost OperatingLeaseCost	184000	usd
CY2021Q2	us-gaap	Operating Lease Cost OperatingLeaseCost	168000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	368000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	336000	usd
CY2022Q2	us-gaap	Variable Lease Cost VariableLeaseCost	0	usd
CY2021Q2	us-gaap	Variable Lease Cost VariableLeaseCost	77000	usd
	us-gaap	Variable Lease Cost VariableLeaseCost	0	usd
	us-gaap	Variable Lease Cost VariableLeaseCost	157000	usd
CY2022Q2	us-gaap	Lease Cost LeaseCost	184000	usd
CY2021Q2	us-gaap	Lease Cost LeaseCost	245000	usd
	us-gaap	Lease Cost LeaseCost	368000	usd
	us-gaap	Lease Cost LeaseCost	493000	usd
	us-gaap	Operating Lease Payments OperatingLeasePayments	368000	usd
CY2022Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y8M23D
CY2022Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0513
CY2022Q2	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	743000	usd
CY2022Q2	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	702000	usd
CY2022Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	486000	usd
CY2022Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	268000	usd
CY2022Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	132000	usd
CY2022Q2	ubfo	Lessee Operating Lease Liability To Be Paid After Year Four LesseeOperatingLeaseLiabilityToBePaidAfterYearFour	374000	usd
CY2022Q2	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	2705000	usd
CY2022Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	304000	usd
CY2022Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	2401000	usd
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1874000	usd
	us-gaap	Interest Paid Net InterestPaidNet	1135000	usd
	us-gaap	Interest Paid Net InterestPaidNet	990000	usd
	us-gaap	Income Taxes Paid IncomeTaxesPaid	2920000	usd
	us-gaap	Income Taxes Paid IncomeTaxesPaid	2060000	usd
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	44000	usd
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	50000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-20433000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-247000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	2594000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	325000	usd
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1871000	usd
CY2022Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.11
CY2022Q2	us-gaap	Dividends Common Stock DividendsCommonStock	1874000	usd
CY2022Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.11
CY2022Q1	us-gaap	Dividends Common Stock DividendsCommonStock	1874000	usd
CY2022Q2	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	3000000	usd
CY2022Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	3435000	usd
CY2021Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2705000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	5878000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4115000	usd
CY2022Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17036364	shares
CY2021Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17010288	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17033401	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17010210	shares
CY2022Q2	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	21391	shares
CY2021Q2	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	22590	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	21341	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	17267	shares
CY2022Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17057755	shares
CY2021Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17032878	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17054742	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17027477	shares
CY2022Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2021Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.35
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.2816
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.24
CY2022Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2021Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.16
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.34
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.24
CY2022Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	97000	shares
CY2021Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	71000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	97000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	101000	shares
CY2022Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	usd
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2362000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1613000	usd
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.2867
	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	725000	usd
	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	-331000	usd
	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	725000	usd
	ubfo	Fair Value Option Credit Risk Gross Losses On Assets FairValueOptionCreditRiskGrossLossesOnAssets	1869000	usd
	ubfo	Fair Value Option Credit Risk Losses On Assets Net FairValueOptionCreditRiskLossesOnAssetsNet	1317000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	2594000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	1827000	usd
	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	-331000	usd
	ubfo	Fair Value Option Credit Risk Gross Gain On Assets FairValueOptionCreditRiskGrossGainOnAssets	656000	usd
	ubfo	Fair Value Option Credit Risk Gain On Assets Net FairValueOptionCreditRiskGainOnAssetsNet	462000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	325000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	229000	usd
CY2022Q2	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	422000	usd
CY2021Q2	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	-270000	usd
CY2022Q2	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	422000	usd
CY2022Q2	ubfo	Fair Value Option Credit Risk Gross Losses On Assets FairValueOptionCreditRiskGrossLossesOnAssets	869000	usd
CY2022Q2	ubfo	Fair Value Option Credit Risk Losses On Assets Net FairValueOptionCreditRiskLossesOnAssetsNet	612000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	1300000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	910000	usd
CY2021Q2	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	-270000	usd
CY2021Q2	ubfo	Fair Value Option Credit Risk Gross Gain On Assets FairValueOptionCreditRiskGrossGainOnAssets	377000	usd
CY2021Q2	ubfo	Fair Value Option Credit Risk Gain On Assets Net FairValueOptionCreditRiskGainOnAssetsNet	265000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-647000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-456000	usd
CY2022Q2	us-gaap	Goodwill Goodwill	4488000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	4488000	usd
	ubfo	Minimum Term Of Guarantees MinimumTermOfGuarantees	P1M
	ubfo	Maximum Term Of Guarantees MaximumTermOfGuarantees	P3Y

Files In Submission

Name	View Source	Status
0001137547-22-000032-index-headers.html	Edgar Link	pending
0001137547-22-000032-index.html	Edgar Link	pending
0001137547-22-000032.txt	Edgar Link	pending
0001137547-22-000032-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
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report.css	Edgar Link	pending
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ubfo-20220630.htm	Edgar Link	pending
ubfo-20220630.xsd	Edgar Link	pending
ubfo-20220630exhibit311.htm	Edgar Link	pending
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ubfo-20220630_cal.xml	Edgar Link	unprocessable
ubfo-20220630_def.xml	Edgar Link	unprocessable
ubfo-20220630_htm.xml	Edgar Link	completed
ubfo-20220630_lab.xml	Edgar Link	unprocessable
ubfo-20220630_pre.xml	Edgar Link	unprocessable

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$UBFO
UNITED SECURITY BANCSHARES Stock $ubfo

2022 Q3 Form 10-Q Financial Statement

#000113754722000032 Filed on August 05, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$UBFO UNITED SECURITY BANCSHARES Stock $ubfo

2022 Q3 Form 10-Q Financial Statement

#000113754722000032 Filed on August 05, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$UBFO
UNITED SECURITY BANCSHARES Stock $ubfo