$UBFO
UNITED SECURITY BANCSHARES Stock $ubfo

$ubfo Overview Financials Valuation SEC Filings Company Website

2020 Q3 Form 10-Q Financial Statement

#000113754720000035 Filed on October 30, 2020

Income Statement

Concept	2020 Q3	2019 Q3	2019 Q2
Revenue	$8.098M	$10.42M	$10.31M
YoY Change	-22.26%	9.03%	22.2%
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	$340.0K	$370.0K	$330.0K
YoY Change	-8.11%	8.82%	-2.94%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$500.0K	$1.061M	$1.008M
YoY Change	-52.87%	53.55%	52.96%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$3.165M	$5.869M	$5.767M
YoY Change	-46.07%	18.76%	21.0%
Income Tax	$894.0K	$1.696M	$1.670M
% Of Pretax Income	28.25%	28.9%	28.96%
Net Earnings	$2.271M	$4.173M	$4.097M
YoY Change	-45.58%	18.62%	20.75%
Net Earnings / Revenue	28.04%	40.06%	39.74%
Basic Earnings Per Share	$0.13	$0.25	$0.24
Diluted Earnings Per Share	$0.13	$0.25	$0.24
COMMON SHARES
Basic Shares Outstanding	16.98M shares	16.95M shares	16.95M shares
Diluted Shares Outstanding	17.00M shares	16.99M shares	16.98M shares

Balance Sheet

Concept	2020 Q3	2019 Q3	2019 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$323.3M	$245.9M	$309.5M
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	$12.30M	$9.455M	$9.529M
YoY Change	30.09%	-4.25%	-5.1%
Goodwill	$4.488M	$4.488M	$4.488M
YoY Change	0.0%	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$2.600M	$3.100M	$3.100M
YoY Change	-16.13%	10.71%	19.23%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.134B	$957.4M	$1.006B
YoY Change	18.44%	5.9%	14.44%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$0.00	$100.0K	$100.0K
YoY Change	-100.0%	-98.7%	-98.61%
Accrued Expenses	$3.000M	$3.700M	$3.900M
YoY Change	-18.92%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$3.000M	$3.800M	$4.000M
YoY Change	-21.05%	-50.65%	-44.44%
LONG-TERM LIABILITIES
Long-Term Debt	$10.10M	$10.30M	$10.50M
YoY Change	-1.94%	-0.96%	3.96%
Other Long-Term Liabilities	$8.000M	$7.800M	$7.700M
YoY Change	2.56%
Total Long-Term Liabilities	$18.10M	$18.10M	$18.20M
YoY Change	0.0%	74.04%	80.2%
TOTAL LIABILITIES
Total Short-Term Liabilities	$3.000M	$3.800M	$4.000M
Total Long-Term Liabilities	$18.10M	$18.10M	$18.20M
Total Liabilities	$1.016B	$842.2M	$893.2M
YoY Change	20.63%	5.67%	15.36%
SHAREHOLDERS EQUITY
Retained Earnings	$59.08M	$56.62M	$54.31M
YoY Change	4.35%	18.32%	18.01%
Common Stock	$59.29M	$58.90M	$58.82M
YoY Change	0.67%	0.73%	0.87%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$118.1M	$115.2M	$113.3M
YoY Change
Total Liabilities & Shareholders Equity	$1.134B	$957.4M	$1.006B
YoY Change	18.44%	5.9%	14.44%

Cashflow Statement

Concept	2020 Q3	2019 Q3	2019 Q2
OPERATING ACTIVITIES
Net Income	$2.271M	$4.173M	$4.097M
YoY Change	-45.58%	18.62%	20.75%
Depreciation, Depletion And Amortization	$340.0K	$370.0K	$330.0K
YoY Change	-8.11%	8.82%	-2.94%
Cash From Operating Activities	$1.250M	$4.690M	$2.260M
YoY Change	-73.35%	12.47%	653.33%
INVESTING ACTIVITIES
Capital Expenditures	-$280.0K	-$290.0K	-$280.0K
YoY Change	-3.45%	61.11%	16.67%
Acquisitions
YoY Change
Other Investing Activities	-$6.970M	-$15.35M	$9.310M
YoY Change	-54.59%	86.74%	90.39%
Cash From Investing Activities	-$7.270M	-$15.65M	$9.030M
YoY Change	-53.55%	86.53%	94.19%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	99.81M	-52.55M	37.47M
YoY Change	-289.93%	-357.6%	79.88%
NET CHANGE
Cash From Operating Activities	1.250M	4.690M	2.260M
Cash From Investing Activities	-7.270M	-15.65M	9.030M
Cash From Financing Activities	99.81M	-52.55M	37.47M
Net Change In Cash	93.79M	-63.51M	48.76M
YoY Change	-247.68%	-492.52%	89.14%
FREE CASH FLOW
Cash From Operating Activities	$1.250M	$4.690M	$2.260M
Capital Expenditures	-$280.0K	-$290.0K	-$280.0K
Free Cash Flow	$1.530M	$4.980M	$2.540M
YoY Change	-69.28%	14.48%	370.37%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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	dei	Entity Central Index Key EntityCentralIndexKey	0001137547
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Period End Date DocumentPeriodEndDate	2020-09-30
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	CA
	dei	Document Type DocumentType	10-Q
	dei	Entity File Number EntityFileNumber	000-32897
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Transition Report DocumentTransitionReport	false
	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 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	Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	true
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
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CY2019Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	27291000	USD
CY2020Q3	ubfo	Due From Frb Interest Bearing Cash DueFromFrbInterestBearingCash	294135000	USD
CY2019Q4	ubfo	Due From Frb Interest Bearing Cash DueFromFrbInterestBearingCash	191704000	USD
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CY2020Q3	us-gaap	Noninterest Expense Directors Fees NoninterestExpenseDirectorsFees	94000	USD
CY2019Q3	us-gaap	Noninterest Expense Directors Fees NoninterestExpenseDirectorsFees	95000	USD
	us-gaap	Noninterest Expense Directors Fees NoninterestExpenseDirectorsFees	282000	USD
	us-gaap	Noninterest Expense Directors Fees NoninterestExpenseDirectorsFees	281000	USD
CY2020Q3	ubfo	Correspondent Bank Service Charges CorrespondentBankServiceCharges	19000	USD
CY2019Q3	ubfo	Correspondent Bank Service Charges CorrespondentBankServiceCharges	14000	USD
	ubfo	Correspondent Bank Service Charges CorrespondentBankServiceCharges	52000	USD
	ubfo	Correspondent Bank Service Charges CorrespondentBankServiceCharges	42000	USD
CY2020Q3	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-35000	USD
CY2019Q3	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-71000	USD
	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-968000	USD
	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-223000	USD
CY2020Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	469000	USD
CY2019Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	573000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1663000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1677000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	5210000	USD
CY2019Q3	us-gaap	Noninterest Expense NoninterestExpense	5335000	USD
	us-gaap	Noninterest Expense NoninterestExpense	16355000	USD
	us-gaap	Noninterest Expense NoninterestExpense	15943000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3165000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	5869000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	9838000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	17265000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	894000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1696000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2800000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4989000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	2271000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	4173000	USD
	us-gaap	Net Income Loss NetIncomeLoss	7038000	USD
	us-gaap	Net Income Loss NetIncomeLoss	12276000	USD
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.13
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.41
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.72
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.13
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.41
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.72
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	16977239	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	16953744	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	16975648	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	16950474	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17000501	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	16990162	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	16993180	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	16981619	shares
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	2271000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	4173000	USD
	us-gaap	Net Income Loss NetIncomeLoss	7038000	USD
	us-gaap	Net Income Loss NetIncomeLoss	12276000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	334000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-246000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	1161000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	317000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	20000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	14000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	60000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	42000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-326000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-501000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-779000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-1748000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	28000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-733000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	38000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	442000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-1389000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-76000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	343000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	94000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	6000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	4000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	17000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	12000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	-97000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	-148000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	-230000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	-516000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	81000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-513000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	312000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	7350000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	11297000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	109240000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-284000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-979000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2352000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3660000	USD
CY2019Q1	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.11
CY2019Q1	us-gaap	Dividends Common Stock DividendsCommonStock	1869000	USD
CY2019Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	0	USD
CY2019Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	99000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	4007000	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	111193000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-182000	USD
CY2019Q2	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.11
CY2019Q2	us-gaap	Dividends Common Stock DividendsCommonStock	1865000	USD
CY2019Q2	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	0	USD
CY2019Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	95000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	4097000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	113338000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-513000	USD
CY2019Q3	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.11
CY2019Q3	us-gaap	Dividends Common Stock DividendsCommonStock	1865000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	78000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	4173000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	115211000	USD
CY2019Q4	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-327000	USD
CY2019Q4	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.11
CY2019Q4	us-gaap	Dividends Common Stock DividendsCommonStock	1868000	USD
CY2019Q4	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	0	USD
CY2019Q4	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	77000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	2895000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	115988000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	458000	USD
CY2020Q1	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.11
CY2020Q1	us-gaap	Dividends Common Stock DividendsCommonStock	1867000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	0	USD
CY2020Q1	ubfo	Stockholders Equity Tax Benefit From Restricted Stock Units Released StockholdersEquityTaxBenefitFromRestrictedStockUnitsReleased	1000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	78000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	2754000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	117410000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-227000	USD
CY2020Q2	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.11
CY2020Q2	us-gaap	Dividends Common Stock DividendsCommonStock	1866000	USD
CY2020Q2	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	0	USD
CY2020Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	131000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	2012000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	117460000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	81000	USD
CY2020Q3	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.11
CY2020Q3	us-gaap	Dividends Common Stock DividendsCommonStock	1867000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	108000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	2271000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	118053000	USD
	us-gaap	Net Income Loss NetIncomeLoss	7038000	USD
	us-gaap	Net Income Loss NetIncomeLoss	12276000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2138000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	15000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1044000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1055000	USD
	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	-446000	USD
	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	-575000	USD
	ubfo	Amortizationof Investment Securities AmortizationofInvestmentSecurities	806000	USD
	ubfo	Amortizationof Investment Securities AmortizationofInvestmentSecurities	489000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	1891000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	2181000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-23000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	15000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-261000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-1996000	USD
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	218000	USD
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	508000	USD
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	9000	USD
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	359000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	89000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	128000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	316000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	272000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	199000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-52000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-113000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	727000	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	USD
	us-gaap	Gain Loss On Sale Of Insurance Block GainLossOnSaleOfInsuranceBlock	310000	USD
	us-gaap	Gain Loss On Sale Of Insurance Block GainLossOnSaleOfInsuranceBlock	0	USD
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	382000	USD
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	438000	USD
	ubfo	Gain Loss On Fair Value Of Financial Instruments Net Pretax GainLossOnFairValueOfFinancialInstrumentsNetPretax	1451000	USD
	ubfo	Gain Loss On Fair Value Of Financial Instruments Net Pretax GainLossOnFairValueOfFinancialInstrumentsNetPretax	1571000	USD
	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	0	USD
	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	-115000	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	1000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1629000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-2321000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	9366000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	9765000	USD
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	45000	USD
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	52000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	29016000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	23017000	USD
	ubfo	Principal Paymentsof Availablefor Sale Securities PrincipalPaymentsofAvailableforSaleSecurities	17766000	USD
	ubfo	Principal Paymentsof Availablefor Sale Securities PrincipalPaymentsofAvailableforSaleSecurities	11407000	USD
	us-gaap	Payments To Acquire Loans And Leases Held For Investment PaymentsToAcquireLoansAndLeasesHeldForInvestment	65446000	USD
	us-gaap	Proceeds From Sale Of Loans And Leases Held For Investment ProceedsFromSaleOfLoansAndLeasesHeldForInvestment	17626000	USD
	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	895000	USD
	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	0	USD
	us-gaap	Payments To Acquire Limited Partnership Interests PaymentsToAcquireLimitedPartnershipInterests	201000	USD
	us-gaap	Payments To Acquire Limited Partnership Interests PaymentsToAcquireLimitedPartnershipInterests	300000	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	12000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1243000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1043000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	684000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-75847000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	4992000	USD
	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	178239000	USD
	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	28859000	USD
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-1819000	USD
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-14280000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	5602000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3730000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	170818000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	10849000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	104337000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	25606000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	218995000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	220337000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	323332000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	245943000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	87004000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1217000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	304000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	87917000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	76561000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	272000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	521000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	76312000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	0	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	0	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	300000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	300000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	87004000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	18224000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	18332000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	26426000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	26388000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	42054000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	42897000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	87917000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2019Q3	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2019Q3	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2020Q3	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	13985000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	123000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	4000	USD
CY2019Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	18000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	19965000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	181000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	33950000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	304000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	29361000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	199000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	27233000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	322000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	56594000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	521000	USD
	ubfo	Number Of General Segments For The Segregation Of Portfolio NumberOfGeneralSegmentsForTheSegregationOfPortfolio	2	segment
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	89000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	128000	USD
CY2020Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	0	USD
CY2019Q4	us-gaap	Trading Securities TradingSecurities	0	USD
CY2019Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	0	USD
CY2020Q3	us-gaap	Trading Securities TradingSecurities	0	USD
CY2020Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	661482000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	597374000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	12051000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	649431000	USD
CY2020Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	661482000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	53000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	12355000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	585019000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	597374000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	386000	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
CY2019Q4	us-gaap	Financing Receivable Loan In Process FinancingReceivableLoanInProcess	0	USD
CY2020Q3	us-gaap	Financing Receivable Loan In Process FinancingReceivableLoanInProcess	0	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	11535000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	11697000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	15044000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	13459000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1600000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	15059000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	402000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	15000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	14064000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	15875000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	384000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	17036000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	3008000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	17072000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1145000	USD
CY2019	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	18125000	USD
CY2019	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	601000	USD
CY2019	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	36000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	15256000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	18208000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	121000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	120000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	77000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	44000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	15875000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	454000	USD
	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	225000	USD
	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	173000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	18390000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	384000	USD
	ubfo	Financing Receivable Periodof Successful Payment History Usedfor Restructured Loan Accrual Status FinancingReceivablePeriodofSuccessfulPaymentHistoryUsedforRestructuredLoanAccrualStatus	P6M
	ubfo	Financing Receivable Modifications Numberof Contracts During Period2 FinancingReceivableModificationsNumberofContractsDuringPeriod2	1	contract
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	179000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	179000	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	contract
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	USD
CY2020Q3	ubfo	Number Of Restructured Loans NumberOfRestructuredLoans	9	loan
CY2020Q3	ubfo	Total Restructured Loans TotalRestructuredLoans	4571000	USD
CY2019Q4	ubfo	Number Of Restructured Loans NumberOfRestructuredLoans	13	loan
CY2019Q4	ubfo	Total Restructured Loans TotalRestructuredLoans	5187000	USD
CY2020Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	5155000	USD
CY2020Q3	ubfo	Financing Receivable Modifications Additions FinancingReceivableModificationsAdditions	0	USD
CY2020Q3	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Principal Additions Reductions FinancingReceivablesImpairedTroubledDebtRestructuringPrincipalAdditionsReductions	584000	USD
CY2020Q3	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Credit Losses Write Offs FinancingReceivablesImpairedTroubledDebtRestructuringCreditLossesWriteOffs	0	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	4571000	USD
CY2020Q3	ubfo	Financing Receivable Modification Allowance For Loan Losses FinancingReceivableModificationAllowanceForLoanLosses	402000	USD
CY2020Q3	ubfo	Financing Receivable Modifications Defaults FinancingReceivableModificationsDefaults	0	USD
CY2019Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	6183000	USD
CY2019Q3	ubfo	Financing Receivable Modifications Additions FinancingReceivableModificationsAdditions	0	USD
CY2019Q3	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Principal Additions Reductions FinancingReceivablesImpairedTroubledDebtRestructuringPrincipalAdditionsReductions	857000	USD
CY2019Q3	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Credit Losses Write Offs FinancingReceivablesImpairedTroubledDebtRestructuringCreditLossesWriteOffs	30000	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	5296000	USD
CY2019Q3	ubfo	Financing Receivable Modification Allowance For Loan Losses FinancingReceivableModificationAllowanceForLoanLosses	617000	USD
CY2019Q3	ubfo	Financing Receivable Modifications Defaults FinancingReceivableModificationsDefaults	0	USD
CY2019Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	5187000	USD
	ubfo	Financing Receivable Modifications Additions FinancingReceivableModificationsAdditions	179000	USD
	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Principal Additions Reductions FinancingReceivablesImpairedTroubledDebtRestructuringPrincipalAdditionsReductions	795000	USD
	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Credit Losses Write Offs FinancingReceivablesImpairedTroubledDebtRestructuringCreditLossesWriteOffs	0	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	4571000	USD
CY2020Q3	ubfo	Financing Receivable Modification Allowance For Loan Losses FinancingReceivableModificationAllowanceForLoanLosses	402000	USD
	ubfo	Financing Receivable Modifications Defaults FinancingReceivableModificationsDefaults	0	USD
CY2018Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	7059000	USD
	ubfo	Financing Receivable Modifications Additions FinancingReceivableModificationsAdditions	0	USD
	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Principal Additions Reductions FinancingReceivablesImpairedTroubledDebtRestructuringPrincipalAdditionsReductions	1733000	USD
	ubfo	Financing Receivables Impaired Troubled Debt Restructuring Credit Losses Write Offs FinancingReceivablesImpairedTroubledDebtRestructuringCreditLossesWriteOffs	30000	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	5296000	USD
CY2019Q3	ubfo	Financing Receivable Modification Allowance For Loan Losses FinancingReceivableModificationAllowanceForLoanLosses	617000	USD
	ubfo	Financing Receivable Modifications Defaults FinancingReceivableModificationsDefaults	0	USD
	ubfo	Number Of Payment Deferrals NumberOfPaymentDeferrals	23	payment_deferral
CY2020Q3	ubfo	Financing Receivable After Allowance For Credit Loss Modified FinancingReceivableAfterAllowanceForCreditLossModified	661482000	USD
	ubfo	Number Of Risk Rating Approaches NumberOfRiskRatingApproaches	2	rating
	ubfo	Numberof Loan Portfolio Segment NumberofLoanPortfolioSegment	10	segment
	ubfo	Numberof Loans Entity Experienced Losses NumberofLoansEntityExperiencedLosses	3	loan
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8862000	USD
CY2020Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	4000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	284000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	126000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	158000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8708000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	402000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	8306000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8708000	USD
CY2019Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8452000	USD
CY2019Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	5000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	299000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	72000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	227000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8230000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1142000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	7088000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8230000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	7908000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	2138000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1492000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	154000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	1338000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8708000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	402000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	8306000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8708000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8395000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	15000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	418000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	238000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	180000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8230000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1142000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	7088000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8230000	USD
CY2020Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	15059000	USD
CY2020Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	646423000	USD
CY2020Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	661482000	USD
CY2019Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	18362000	USD
CY2020Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	191000	USD
CY2019Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	197000	USD
CY2019Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	551766000	USD
CY2019Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	570128000	USD
CY2020Q3	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	430028000	USD
CY2020Q3	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	430028000	USD
CY2019Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	311950000	USD
CY2019Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	311950000	USD
CY2020Q3	us-gaap	Deposits Money Market Deposits And Negotiable Order Of Withdrawal Now DepositsMoneyMarketDepositsAndNegotiableOrderOfWithdrawalNOW	406706000	USD
CY2020Q3	us-gaap	Deposits Money Market Deposits And Negotiable Order Of Withdrawal Now DepositsMoneyMarketDepositsAndNegotiableOrderOfWithdrawalNOW	406706000	USD
CY2019Q4	us-gaap	Deposits Money Market Deposits And Negotiable Order Of Withdrawal Now DepositsMoneyMarketDepositsAndNegotiableOrderOfWithdrawalNOW	360934000	USD
CY2019Q4	us-gaap	Deposits Money Market Deposits And Negotiable Order Of Withdrawal Now DepositsMoneyMarketDepositsAndNegotiableOrderOfWithdrawalNOW	360934000	USD
CY2020Q3	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	94467000	USD
CY2020Q3	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	94467000	USD
CY2019Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	80078000	USD
CY2019Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	80078000	USD
CY2020Q3	ubfo	Time Deposits Less Than250000 TimeDepositsLessThan250000	41379000	USD
CY2020Q3	ubfo	Time Deposits Less Than250000 TimeDepositsLessThan250000	41379000	USD
CY2019Q4	ubfo	Time Deposits Less Than250000 TimeDepositsLessThan250000	44926000	USD
CY2019Q4	ubfo	Time Deposits Less Than250000 TimeDepositsLessThan250000	44926000	USD
CY2020Q3	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	22203000	USD
CY2020Q3	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	22203000	USD
CY2019Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	20474000	USD
CY2019Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	20474000	USD
CY2020Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	564755000	USD
CY2019Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	506412000	USD
CY2020Q3	us-gaap	Deposits Deposits	994783000	USD
CY2019Q4	us-gaap	Deposits Deposits	818362000	USD
CY2020Q3	us-gaap	Federal Home Loan Bank Advances Current FederalHomeLoanBankAdvancesCurrent	0	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Current FederalHomeLoanBankAdvancesCurrent	0	USD
	ubfo	Lessee Operating Lease Number Of Contracts LesseeOperatingLeaseNumberOfContracts	12	contract
	ubfo	Lessee Financing Lease Number Of Contracts LesseeFinancingLeaseNumberOfContracts	0	contract
	us-gaap	Operating Lease Cost OperatingLeaseCost	570000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	575000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	682000	USD
CY2020Q3	us-gaap	Variable Lease Cost VariableLeaseCost	51000	USD
CY2019Q3	us-gaap	Variable Lease Cost VariableLeaseCost	7000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	169000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	115000	USD
CY2020Q3	us-gaap	Lease Cost LeaseCost	242000	USD
CY2019Q3	us-gaap	Lease Cost LeaseCost	204000	USD
	us-gaap	Lease Cost LeaseCost	739000	USD
	us-gaap	Lease Cost LeaseCost	690000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	571000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y10M9D
CY2020Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0515
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	661000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	666000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	562000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	371000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	556000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	3498000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	481000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	3017000	USD
	us-gaap	Interest Paid Net InterestPaidNet	1814000	USD
	us-gaap	Interest Paid Net InterestPaidNet	3012000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	2380000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	4890000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	60000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	42000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	1161000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	317000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-779000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-1748000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1867000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1865000	USD
CY2019Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	3395000	USD
CY2019Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	3486000	USD
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.11
CY2020Q3	us-gaap	Dividends Common Stock DividendsCommonStock	1867000	USD
CY2020Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.11
CY2020Q2	us-gaap	Dividends Common Stock DividendsCommonStock	1866000	USD
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.11
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2271000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4173000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	16990162	shares
CY2020Q1	us-gaap	Dividends Common Stock DividendsCommonStock	1867000	USD
CY2017Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	3000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	7038000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	12276000	USD
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	16977239	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	16953744	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	16975648	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	16950474	shares
CY2020Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	23262	shares
CY2019Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	36418	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	17532	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	31145	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17000501	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	16993180	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	16981619	shares
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.13
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.41
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.72
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.13
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.41
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.72
CY2020Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	75000	shares
CY2019Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	60000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	88000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	60000	shares
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.2846
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.2890
CY2020Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2800000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4989000	USD
	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	672000	USD
	ubfo	Fair Value Option Credit Risk Gains Losseson Assets Netof Tax FairValueOptionCreditRiskGainsLossesonAssetsNetofTax	473000	USD
	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	-177000	USD
	ubfo	Fair Value Option Credit Risk Gains Losseson Assets Netof Tax FairValueOptionCreditRiskGainsLossesonAssetsNetofTax	-126000	USD
	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	672000	USD
	ubfo	Fair Value Option Credit Risk Gains Losseson Assets Netof Tax FairValueOptionCreditRiskGainsLossesonAssetsNetofTax	473000	USD
	ubfo	Fair Value Option Credit Risk Gain On Assets Net Before Tax FairValueOptionCreditRiskGainOnAssetsNetBeforeTax	1451000	USD
	ubfo	Fair Value Option Credit Risk Gain On Assets Net After Tax FairValueOptionCreditRiskGainOnAssetsNetAfterTax	1022000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-779000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-549000	USD
	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	-177000	USD
	ubfo	Fair Value Option Credit Risk Gains Losseson Assets Netof Tax FairValueOptionCreditRiskGainsLossesonAssetsNetofTax	-126000	USD
	ubfo	Fair Value Option Credit Risk Gain On Assets Net Before Tax FairValueOptionCreditRiskGainOnAssetsNetBeforeTax	1571000	USD
	ubfo	Fair Value Option Credit Risk Gain On Assets Net After Tax FairValueOptionCreditRiskGainOnAssetsNetAfterTax	1107000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-1748000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-1233000	USD
CY2020Q3	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	-344000	USD
CY2020Q3	ubfo	Fair Value Option Credit Risk Gains Losseson Assets Netof Tax FairValueOptionCreditRiskGainsLossesonAssetsNetofTax	-243000	USD
CY2019Q3	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	159000	USD
CY2019Q3	ubfo	Fair Value Option Credit Risk Gains Losseson Assets Netof Tax FairValueOptionCreditRiskGainsLossesonAssetsNetofTax	-112000	USD
CY2020Q3	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	-344000	USD
CY2020Q3	ubfo	Fair Value Option Credit Risk Gains Losseson Assets Netof Tax FairValueOptionCreditRiskGainsLossesonAssetsNetofTax	-243000	USD
CY2020Q3	ubfo	Fair Value Option Credit Risk Gross Losses On Assets FairValueOptionCreditRiskGrossLossesOnAssets	18000	USD
CY2020Q3	ubfo	Fair Value Option Credit Risk Losses On Assets Net FairValueOptionCreditRiskLossesOnAssetsNet	13000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-326000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-230000	USD
CY2019Q3	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	159000	USD
CY2019Q3	ubfo	Fair Value Option Credit Risk Gains Losseson Assets Netof Tax FairValueOptionCreditRiskGainsLossesonAssetsNetofTax	-112000	USD
CY2019Q3	ubfo	Fair Value Option Credit Risk Gain On Assets Net Before Tax FairValueOptionCreditRiskGainOnAssetsNetBeforeTax	660000	USD
CY2019Q3	ubfo	Fair Value Option Credit Risk Gain On Assets Net After Tax FairValueOptionCreditRiskGainOnAssetsNetAfterTax	465000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-501000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-353000	USD
CY2020Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	95114000	USD
CY2020Q3	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	10081000	USD
CY2019Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	80232000	USD
CY2019Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	10808000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	4488000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	4488000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	4488000	USD
	ubfo	Number Of Payment Deferrals NumberOfPaymentDeferrals	23	payment_deferral

Files In Submission

Name	View Source	Status
0001137547-20-000035-index-headers.html	Edgar Link	pending
0001137547-20-000035-index.html	Edgar Link	pending
0001137547-20-000035.txt	Edgar Link	pending
0001137547-20-000035-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending
ubfo-20200930.htm	Edgar Link	pending
ubfo-20200930.xsd	Edgar Link	pending
ubfo-20200930exhibit311.htm	Edgar Link	pending
ubfo-20200930exhibit312.htm	Edgar Link	pending
ubfo-20200930exhibit321.htm	Edgar Link	pending
ubfo-20200930exhibit322.htm	Edgar Link	pending
ubfo-20200930_cal.xml	Edgar Link	unprocessable
ubfo-20200930_def.xml	Edgar Link	unprocessable
ubfo-20200930_htm.xml	Edgar Link	completed
ubfo-20200930_lab.xml	Edgar Link	unprocessable
ubfo-20200930_pre.xml	Edgar Link	unprocessable

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$UBFO
UNITED SECURITY BANCSHARES Stock $ubfo

2020 Q3 Form 10-Q Financial Statement

#000113754720000035 Filed on October 30, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$UBFO UNITED SECURITY BANCSHARES Stock $ubfo

2020 Q3 Form 10-Q Financial Statement

#000113754720000035 Filed on October 30, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$UBFO
UNITED SECURITY BANCSHARES Stock $ubfo