$UNB
Union Bankshares Inc Stock $unb

$unb Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000070686322000020 Filed on March 24, 2022

Income Statement

Concept	2021 Q4	2021 Q3	2021 Q1
Revenue	$10.02M	$9.852M	$9.500M
YoY Change	7.72%	5.45%	5.99%
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	$470.0K	$430.0K	$500.0K
YoY Change	-9.62%	-15.69%	-3.85%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$779.0K	$706.0K	$1.101M
YoY Change	-33.48%	-39.03%	-24.43%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$4.010M	$4.800M	$3.417M
YoY Change	-13.2%	-2.0%	33.89%
Income Tax	$630.0K	$874.0K	$541.0K
% Of Pretax Income	15.71%	18.21%	15.83%
Net Earnings	$3.378M	$3.925M	$2.876M
YoY Change	-10.96%	-5.35%	30.97%
Net Earnings / Revenue	33.7%	39.84%	30.27%
Basic Earnings Per Share	$0.76	$0.87	$0.64
Diluted Earnings Per Share	$0.75	$0.87	$0.64
COMMON SHARES
Basic Shares Outstanding	4.485M shares	4.485M shares	4.480M shares
Diluted Shares Outstanding		4.513M shares

Balance Sheet

Concept	2021 Q4	2021 Q3	2021 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$334.9M	$305.5M	$199.6M
YoY Change	45.86%	99.04%	51.49%
Cash & Equivalents	$65.92M	$120.1M	$56.51M
Short-Term Investments	$269.0M	$185.4M	$143.1M
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$21.62M	$21.81M	$19.88M
YoY Change	7.86%	6.63%	-3.15%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$7.572M	$1.200M	$1.100M
YoY Change	15.01%	33.33%	83.33%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.205B	$1.158B	$1.104B
YoY Change	10.23%	14.78%	25.05%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$9.800M	$10.70M	$9.400M
YoY Change	-12.5%	-3.6%	-15.32%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$9.800M	$10.70M	$9.400M
YoY Change	-12.5%	-3.6%	-15.32%
LONG-TERM LIABILITIES
Long-Term Debt	$16.20M	$16.20M	$0.00
YoY Change
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$16.20M	$16.20M	$0.00
YoY Change
TOTAL LIABILITIES
Total Short-Term Liabilities	$9.800M	$10.70M	$9.400M
Total Long-Term Liabilities	$16.20M	$16.20M	$0.00
Total Liabilities	$1.121B	$1.075B	$1.024B
YoY Change	10.7%	15.45%	26.59%
SHAREHOLDERS EQUITY
Retained Earnings	$78.35M	$76.45M	$72.49M
YoY Change	10.2%	11.23%	11.9%
Common Stock	$9.934M	$9.918M	$9.911M
YoY Change	0.24%	0.17%	0.12%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$4.160M	$4.162M	$4.167M
YoY Change	-0.22%	-0.26%	-0.33%
Treasury Stock Shares	473.4K shares	473.7K shares	474.3K shares
Shareholders Equity	$84.34M	$83.75M	$79.82M
YoY Change
Total Liabilities & Shareholders Equity	$1.205B	$1.158B	$1.104B
YoY Change	10.23%	14.78%	25.05%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2021 Q1
OPERATING ACTIVITIES
Net Income	$3.378M	$3.925M	$2.876M
YoY Change	-10.96%	-5.35%	30.97%
Depreciation, Depletion And Amortization	$470.0K	$430.0K	$500.0K
YoY Change	-9.62%	-15.69%	-3.85%
Cash From Operating Activities	$1.890M	$29.92M	-$4.776M
YoY Change	-59.09%	94.66%	-30.95%
INVESTING ACTIVITIES
Capital Expenditures	-$270.0K	-$610.0K	$302.0K
YoY Change	285.71%	12.96%	272.84%
Acquisitions
YoY Change
Other Investing Activities	-$101.8M	-$57.98M	-$73.32M
YoY Change	280.88%	-23.86%	809.68%
Cash From Investing Activities	-$102.0M	-$58.58M	-$73.62M
YoY Change	280.75%	-23.6%	804.88%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			-$10.00K
YoY Change			-54.55%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	45.99M	87.52M	$12.13M
YoY Change	-42.85%	-1.84%	115.45%
NET CHANGE
Cash From Operating Activities	1.890M	29.92M	-$4.776M
Cash From Investing Activities	-102.0M	-58.58M	-$73.62M
Cash From Financing Activities	45.99M	87.52M	$12.13M
Net Change In Cash	-54.16M	58.86M	-$66.27M
YoY Change	-192.91%	111.35%	603.3%
FREE CASH FLOW
Cash From Operating Activities	$1.890M	$29.92M	-$4.776M
Capital Expenditures	-$270.0K	-$610.0K	$302.0K
Free Cash Flow	$2.160M	$30.53M	-$5.078M
YoY Change	-53.94%	91.89%	-27.44%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Entity File Number EntityFileNumber	001-15985
CY2021	dei	Entity Registrant Name EntityRegistrantName	UNION BANKSHARES, INC.
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	VT
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	03-0283552
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CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4188000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1650000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	8982000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	14455000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	71843000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	12805000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1650000	USD
CY2020	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	38000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.28
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5727000	USD
CY2020	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	236000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	22000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	80867000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	13170000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4188000	USD
CY2021	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	40000	USD
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.32
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5917000	USD
CY2021	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	299000	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	72000	USD
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	2000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	84341000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	13170000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	12805000	USD
CY2021	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1825000	USD
CY2020	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1891000	USD
CY2021	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0	USD
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2200000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	371000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-777000	USD
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-579000	USD
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-554000	USD
CY2021	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	1011000	USD
CY2020	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	935000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	299000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	236000	USD
CY2021	us-gaap	Increase Decrease In Loans Deferred Income IncreaseDecreaseInLoansDeferredIncome	851000	USD
CY2020	us-gaap	Increase Decrease In Loans Deferred Income IncreaseDecreaseInLoansDeferredIncome	-1189000	USD
CY2021	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	221773000	USD
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	271362000	USD
CY2021	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	198458000	USD
CY2020	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	287940000	USD
CY2021	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	4956000	USD
CY2020	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	8168000	USD
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-108000	USD
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	0	USD
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	11000	USD
CY2021	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	13000	USD
CY2020	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0	USD
CY2021	us-gaap	Increase Decrease In Equity Securities Fv Ni IncreaseDecreaseInEquitySecuritiesFvNi	-21000	USD
CY2020	us-gaap	Increase Decrease In Equity Securities Fv Ni IncreaseDecreaseInEquitySecuritiesFvNi	240000	USD
CY2021	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-881000	USD
CY2020	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	1196000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	71000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	171000	USD
CY2021	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	11000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	0	USD
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	5831000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	897000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-821000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	824000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	29190000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-7062000	USD
CY2020	us-gaap	Proceeds From Sale Of Wholly Owned Real Estate And Real Estate Acquired In Settlement Of Loans ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans	0	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-190008000	USD
CY2021	unb	Proceeds From Interest Bearing Deposits In Banks ProceedsFromInterestBearingDepositsInBanks	6972000	USD
CY2020	unb	Proceeds From Interest Bearing Deposits In Banks ProceedsFromInterestBearingDepositsInBanks	3578000	USD
CY2021	unb	Payments For Interest Bearing Deposits In Banks PaymentsForInterestBearingDepositsInBanks	7469000	USD
CY2020	unb	Payments For Interest Bearing Deposits In Banks PaymentsForInterestBearingDepositsInBanks	9711000	USD
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	8717000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	3076000	USD
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	28196000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	22076000	USD
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	204848000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	41978000	USD
CY2021	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	106000	USD
CY2020	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	117000	USD
CY2021	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	14000	USD
CY2020	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-1457000	USD
CY2021	us-gaap	Payments For Proceeds From Other Loans And Leases PaymentsForProceedsFromOtherLoansAndLeases	15931000	USD
CY2020	us-gaap	Payments For Proceeds From Other Loans And Leases PaymentsForProceedsFromOtherLoansAndLeases	101055000	USD
CY2021	us-gaap	Proceeds From Recoveries Of Loan Previously Charged Off ProceedsFromRecoveriesOfLoanPreviouslyChargedOff	68000	USD
CY2020	us-gaap	Proceeds From Recoveries Of Loan Previously Charged Off ProceedsFromRecoveriesOfLoanPreviouslyChargedOff	29000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3509000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1007000	USD
CY2021	us-gaap	Payments To Acquire Limited Partnership Interests PaymentsToAcquireLimitedPartnershipInterests	2194000	USD
CY2020	us-gaap	Payments To Acquire Limited Partnership Interests PaymentsToAcquireLimitedPartnershipInterests	2257000	USD
CY2021	us-gaap	Proceeds From Sale Of Wholly Owned Real Estate And Real Estate Acquired In Settlement Of Loans ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans	110000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-125909000	USD
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	7164000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2021	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	0	USD
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-40000000	USD
CY2021	unb	Net Change Noninterest Bearing Deposits NetChangeNoninterestBearingDeposits	49643000	USD
CY2020	unb	Net Change Noninterest Bearing Deposits NetChangeNoninterestBearingDeposits	78811000	USD
CY2021	unb	Net Change Interest Bearing Non Time Deposits NetChangeInterestBearingNonTimeDeposits	86110000	USD
CY2020	unb	Net Change Interest Bearing Non Time Deposits NetChangeInterestBearingNonTimeDeposits	178429000	USD
CY2021	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-34973000	USD
CY2020	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-6965000	USD
CY2021	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	16500000	USD
CY2020	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	USD
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	340000	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	72000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	22000	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2021	unb	Payments Of Dividends Net Of Reinvestment PaymentsOfDividendsNetOfReinvestment	5877000	USD
CY2020	unb	Payments Of Dividends Net Of Reinvestment PaymentsOfDividendsNetOfReinvestment	5689000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	103969000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	204608000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-56849000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	71637000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	122771000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	51134000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	65922000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	122771000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	3449000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	5712000	USD
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1850000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1350000	USD
CY2021	unb	Other Real Estate Acquired In Settlement Of Loans OtherRealEstateAcquiredInSettlementOfLoans	47000	USD
CY2020	unb	Other Real Estate Acquired In Settlement Of Loans OtherRealEstateAcquiredInSettlementOfLoans	50000	USD
CY2021	unb	Increase In Capital Contributions Payable For Limited Partnership Investments IncreaseInCapitalContributionsPayableForLimitedPartnershipInvestments	1264000	USD
CY2020	unb	Increase In Capital Contributions Payable For Limited Partnership Investments IncreaseInCapitalContributionsPayableForLimitedPartnershipInvestments	2722000	USD
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	5917000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	5727000	USD
CY2021	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	40000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	38000	USD
CY2021	unb	Payments Of Dividends Net Of Reinvestment PaymentsOfDividendsNetOfReinvestment	5877000	USD
CY2020	unb	Payments Of Dividends Net Of Reinvestment PaymentsOfDividendsNetOfReinvestment	5689000	USD
CY2021	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Significant concentration of credit risk</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company grants loans primarily to customers in Vermont and New Hampshire. Although it has a diversified loan portfolio, a large portion of the Company's loans are secured by commercial or residential real estate located in Vermont and New Hampshire, resulting in exposure to volatility with each state's real estate market. Additionally, the ability of borrowers to repay loans is highly dependent upon other economic factors throughout Vermont and New Hampshire. The Company typically requires the principals of any commercial borrower to obligate themselves personally on the loan.</span></div>
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:107%">Use of estimates in preparation of consolidated financial statements</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ materially from those estimates. Material estimates that are particularly susceptible to significant change in the near term and involve inherent uncertainties relate to the determination of the ALL on loans, the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans, valuation of deferred tax assets, and asset impairment judgments, including OTTI of investment securities. These estimates involve a significant degree of complexity and subjectivity and the amount of the change that is reasonably possible, should any of these estimates prove inaccurate, cannot be estimated.</span></div>
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Policy For Uncollectible Amounts FinancingReceivableAllowanceForCreditLossesPolicyForUncollectibleAmounts	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Allowance for loan losses</span></div><div style="text-align:justify"><span><br/></span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The ALL is established for estimated losses in the loan portfolio through a provision for loan losses charged to earnings. For all loan classes, loan losses are charged against the ALL when management believes the loan balance is uncollectible or in accordance with federal guidelines. Subsequent recoveries, if any, are credited to the ALL.</span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The ALL is maintained at a level believed by management to be appropriate to absorb probable credit losses inherent in the loan portfolio as of the balance sheet date. The amount of the ALL is based on management's periodic evaluation of the collectability of the loan portfolio, including the nature, volume and risk characteristics of the portfolio, credit concentrations, trends in historical loss experience, estimated value of any underlying collateral, specific impaired loans and economic conditions. While management uses available information to recognize losses on loans, future additions to the ALL may be necessary based on changes in economic conditions or other relevant factors.</span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, various regulatory agencies, as an integral part of their examination process, regularly review the Company's ALL. Such agencies may require the Company to recognize additions to the ALL, with a corresponding charge to earnings, based on their judgments about information available to them at the time of their examination, which may not be currently available to management.</span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The ALL consists of specific, general and unallocated components. The specific component relates to loans that are classified as impaired. Loans are evaluated for impairment and may be classified as impaired when management believes it is probable </span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">that the Company will not collect all the contractual interest and principal payments as scheduled in the loan agreement. Impaired loans may also include troubled loans that are restructured. A TDR occurs when the Company, for economic or legal reasons related to the borrower's financial difficulties, grants a concession to the borrower that would otherwise not be granted. A TDR classification may result from the transfer of assets to the Company in partial satisfaction of a troubled loan, a modification of a loan's terms (such as reduction of stated interest rates below market rates, extension of maturity that does not conform to the Company's policies, reduction of the face amount of the loan, reduction of accrued interest, or reduction or deferment of loan payments), or a combination. A specific reserve amount is allocated to the ALL for individual loans that have been classified as impaired based on management's estimate of the fair value of the collateral for collateral dependent loans, an observable market price, or the present value of anticipated future cash flows. The Company accounts for the change in present value attributable to the passage of time in the loan loss reserve. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Accordingly, the Company does not separately identify individual consumer, real estate or small balance commercial loans for impairment evaluation, unless such loans are subject to a restructuring agreement or have been identified as impaired as part of a larger customer relationship. Management has established the threshold for individual impairment evaluation for commercial loans with balances greater than $500 thousand, based on an evaluation of the Company's historical loss experience on substandard commercial loans.</span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The general component represents the level of ALL allocable to each loan portfolio segment with similar risk characteristics and is determined based on historical loss experience, adjusted for qualitative factors, for each class of loan. Management deems a five year average to be an appropriate time frame on which to base historical losses for each portfolio segment. Qualitative factors considered include underwriting, economic and market conditions, portfolio composition, collateral values, delinquencies, lender experience and legal issues. The qualitative factors are determined based on the various risk characteristics of each portfolio segment. Risk characteristics relevant to each portfolio segment are as follows:</span></div><div style="margin-bottom:6pt;padding-left:18pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;padding-left:14.5pt">Residential real estate</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> - Loans in this segment are collateralized by owner-occupied 1-4 family residential real estate, second and vacation homes, 1-4 family investment properties, home equity and second mortgage loans. Repayment is dependent on the credit quality of the individual borrower. The overall health of the economy, including unemployment rates and housing prices, could have an effect on the credit quality of this segment.</span></div><div style="margin-bottom:6pt;padding-left:18pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;padding-left:14.5pt">Construction real estate</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> - Loans in this segment include residential and commercial construction properties, commercial real estate development loans (while in the construction phase of the projects), land and land development loans. Repayment is dependent on the credit quality of the individual borrower and/or the underlying cash flows generated by the properties being constructed. The overall health of the economy, including unemployment rates, housing prices, vacancy rates and material costs, could have an effect on the credit quality of this segment.</span></div><div style="margin-bottom:6pt;padding-left:18pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;padding-left:14.5pt">Commercial real estate</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> - Loans in this segment are primarily properties occupied by businesses or income-producing properties. The underlying cash flows generated by the properties may be adversely impacted by a downturn in the economy as evidenced by a general slowdown in business or increased vacancy rates which, in turn, could have an effect on the credit quality of this segment. Management requests business financial statements at least annually and monitors the cash flows of these loans.</span></div><div style="margin-bottom:6pt;padding-left:18pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;padding-left:14.5pt">Commercial</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> - Loans in this segment are made to businesses and are generally secured by non-real estate assets of the business. Repayment is expected from the cash flows of the business. A weakened economy, and resultant decreased consumer or business spending, could have an effect on credit quality of this segment. Loans originated under the PPP are also included in the this segment. Management requests business financial statements at least annually and monitors the cash flows of these loans.</span></div><div style="margin-bottom:6pt;padding-left:18pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;padding-left:14.5pt">Consumer</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> - Loans in this segment are made to individuals for personal expenditures, such as an automobile purchase, and include unsecured loans. Repayment is primarily dependent on the credit quality of the individual borrower. The overall health of the economy, including unemployment, could have an effect on the credit quality of this segment.</span></div><div style="margin-bottom:6pt;padding-left:18pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;padding-left:14.5pt">Municipal</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> - Loans in this segment are made to municipalities located within the Company's service area. Repayment is primarily dependent on taxes or other funds collected by the municipalities. Management considers there to be minimal risk surrounding the credit quality of this segment.</span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">An unallocated component is maintained to cover uncertainties that could affect management's estimate of probable losses. The unallocated component of the ALL reflects management's estimate of the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating specific and general losses in the portfolio.</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">All evaluations are inherently subjective as they require estimates that are susceptible to significant revision as more information becomes available or as changes occur in economic conditions or other relevant factors.</span></div>
CY2021Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	1100000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	1000000	USD
CY2021	unb	Company Owned Life Insurance Limit Per Individual Carrier Sum Of Tier1 And Allowable Tier2 Capital Percentage CompanyOwnedLifeInsuranceLimitPerIndividualCarrierSumOfTier1AndAllowableTier2CapitalPercentage	0.15
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	0	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	0	USD
CY2021Q4	unb	Investment In Interest Bearing Deposits In Banks InvestmentInInterestBearingDepositsInBanks	13200000	USD
CY2021Q4	unb	Interest Bearing Deposits In Banks Interest Rate Ranging From InterestBearingDepositsInBanksInterestRateRangingFrom	0.0015
CY2021Q4	unb	Interest Bearing Deposits In Banks Interest Rate Ranging To InterestBearingDepositsInBanksInterestRateRangingTo	0.0355
CY2021Q4	unb	Interest Bearing Deposits In Banks Maturity Within12 Months InterestBearingDepositsInBanksMaturityWithin12Months	7700000	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	269783000	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	2303000	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	4267000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	267819000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	102427000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	3543000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	207000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	105763000	USD
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	0	USD
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	0	USD
CY2021Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	589000	USD
CY2020Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	0	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	78	securitie
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	178964000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	2838000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	32	securitie
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	37328000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1429000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	110	securitie
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	216292000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	4267000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	35	securitie
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	24278000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	97000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	11	securitie
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	3085000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	110000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	46	securitie
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	27363000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	207000	USD
CY2020	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2021	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	8717000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	3076000	USD
CY2021	unb	Proceeds From Calls Of Debt Securities Available For Sale ProceedsFromCallsOfDebtSecuritiesAvailableForSale	789000	USD
CY2020	unb	Proceeds From Calls Of Debt Securities Available For Sale ProceedsFromCallsOfDebtSecuritiesAvailableForSale	0	USD
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	58000	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	32000	USD
CY2021	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	58000	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	21000	USD
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	11000	USD
CY2021Q4	unb	Loans Serviced For Others Unpaid Principal Balance LoansServicedForOthersUnpaidPrincipalBalance	659300000	USD
CY2020Q4	unb	Loans Serviced For Others Unpaid Principal Balance LoansServicedForOthersUnpaidPrincipalBalance	629500000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	12382000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	12633000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	37279000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	37390000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	38906000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	39546000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	88567000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	89569000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	181216000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	178250000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss	269783000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	267819000	USD
CY2020	unb	Paycheck Protection Program Origination Fee Recognized PaycheckProtectionProgramOriginationFeeRecognized	953000	USD
CY2021Q4	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	224400000	USD
CY2021	us-gaap	Loans Receivable Held For Sale Reconciliation To Cash Flow Deductions From Held For Sale LoansReceivableHeldForSaleReconciliationToCashFlowDeductionsFromHeldForSale	216817000	USD
CY2021	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	4956000	USD
CY2020	us-gaap	Loans Receivable Held For Sale Reconciliation To Cash Flow Deductions From Held For Sale LoansReceivableHeldForSaleReconciliationToCashFlowDeductionsFromHeldForSale	263194000	USD
CY2020	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	8168000	USD
CY2021Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	2500000	USD
CY2020Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	2300000	USD
CY2020Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	0	USD
CY2021Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	0	USD
CY2021	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	1454000	USD
CY2020	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	1736000	USD
CY2021	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	1211000	USD
CY2020	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	1194000	USD
CY2021	us-gaap	Servicing Asset At Amortized Value Period Increase Decrease ServicingAssetAtAmortizedValuePeriodIncreaseDecrease	243000	USD
CY2020	us-gaap	Servicing Asset At Amortized Value Period Increase Decrease ServicingAssetAtAmortizedValuePeriodIncreaseDecrease	542000	USD
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	787050000	USD
CY2020Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	771169000	USD
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	8336000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	8271000	USD
CY2021Q4	unb	Financing Receivable Excluding Accrued Interest Deferred Loan Fees Costs FinancingReceivableExcludingAccruedInterestDeferredLoanFeesCosts	-705000	USD
CY2020Q4	unb	Financing Receivable Excluding Accrued Interest Deferred Loan Fees Costs FinancingReceivableExcludingAccruedInterestDeferredLoanFeesCosts	146000	USD
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	779419000	USD
CY2020Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	762752000	USD
CY2021Q4	unb	Paycheck Protection Program Number Of Loans PaycheckProtectionProgramNumberOfLoans	154	loan
CY2020Q4	unb	Paycheck Protection Program Number Of Loans PaycheckProtectionProgramNumberOfLoans	679	loan
CY2021Q4	unb	Paycheck Protection Program Total Amount Of Loans Outstanding PaycheckProtectionProgramTotalAmountOfLoansOutstanding	13600000	USD
CY2020Q4	unb	Paycheck Protection Program Total Amount Of Loans Outstanding PaycheckProtectionProgramTotalAmountOfLoansOutstanding	66200000	USD
CY2021Q4	unb	Paycheck Protection Program Origination Fee PaycheckProtectionProgramOriginationFee	558000	USD
CY2020Q4	unb	Paycheck Protection Program Origination Fee PaycheckProtectionProgramOriginationFee	1600000	USD
CY2021	unb	Paycheck Protection Program Origination Fee Recognized PaycheckProtectionProgramOriginationFeeRecognized	2800000	USD
CY2020Q4	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	210000000	USD
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	787050000	USD
CY2020Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	771169000	USD
CY2020Q4	unb	Mortgage Loansin Processof Foreclosure Number MortgageLoansinProcessofForeclosureNumber	0	loan
CY2021Q4	unb	Mortgage Loansin Processof Foreclosure Number MortgageLoansinProcessofForeclosureNumber	0	loan
CY2021	unb	Financing Receivable Impaired Interest Lost On Nonaccrual Loans FinancingReceivableImpairedInterestLostOnNonaccrualLoans	504000	USD
CY2020	unb	Financing Receivable Impaired Interest Lost On Nonaccrual Loans FinancingReceivableImpairedInterestLostOnNonaccrualLoans	420000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	8271000	USD
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	0	USD
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	68000	USD
CY2021	unb	Financing Receivable Allowance Before Write Offs FinancingReceivableAllowanceBeforeWriteOffs	8339000	USD
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	3000	USD
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	8336000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	6122000	USD
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	2200000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	29000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	8271000	USD
CY2020	unb	Financing Receivable Allowance Before Write Offs FinancingReceivableAllowanceBeforeWriteOffs	8351000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	80000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	8271000	USD
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	46000	USD
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	8290000	USD
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	8336000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	58000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	8213000	USD
CY2021Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	6776000	USD
CY2021Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	780274000	USD
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	787050000	USD
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	4621000	USD
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	766548000	USD
CY2020Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	771169000	USD
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	787050000	USD
CY2020Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	771169000	USD
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1790000	USD
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	1973000	USD
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	46000	USD
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	4986000	USD
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	5544000	USD
CY2021Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	6776000	USD
CY2021Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	7517000	USD
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	46000	USD
CY2021	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	6588000	USD
CY2021	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	427000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1851000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	2003000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	58000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	2770000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	3503000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	4621000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	5506000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	58000	USD
CY2020	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	5156000	USD
CY2020	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	164000	USD
CY2021Q4	unb	Government Guarantees On Impaired Loans GovernmentGuaranteesOnImpairedLoans	423000	USD
CY2020Q4	unb	Government Guarantees On Impaired Loans GovernmentGuaranteesOnImpairedLoans	514000	USD
CY2021Q4	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	35	loan
CY2021Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	2215000	USD
CY2020Q4	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	45	loan
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	2864000	USD
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	loan
CY2020	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	loan
CY2021Q4	unb	Financing Receivable Modifications Outstanding Balanceof Payment Deferrals FinancingReceivableModificationsOutstandingBalanceofPaymentDeferrals	139900000	USD
CY2021Q4	unb	Financing Receivable Modifications Accrued Interest Balance Of Payment Deferrals FinancingReceivableModificationsAccruedInterestBalanceOfPaymentDeferrals	849000	USD
CY2021Q4	unb	Financing Receivable Modifications Outstanding Balance Of Payment Deferrals Subject To Modification Terms FinancingReceivableModificationsOutstandingBalanceOfPaymentDeferralsSubjectToModificationTerms	369000	USD
CY2021Q4	unb	Financing Receivable Modifications Accrued Interest Balance Of Payment Deferrals Subject To Modification Terms FinancingReceivableModificationsAccruedInterestBalanceOfPaymentDeferralsSubjectToModificationTerms	9000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	36310000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	33248000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	14695000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	13209000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	21615000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	20039000	USD
CY2021	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1800000	USD
CY2020	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1900000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P23Y18D
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0390
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1612000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1732000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1690000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1789000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	132000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	115000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	111000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	112000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	114000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	2111000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	2695000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	2695000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1005000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1690000	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	195000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	206000	USD
CY2021	us-gaap	Rental Income Nonoperating RentalIncomeNonoperating	251000	USD
CY2020	us-gaap	Rental Income Nonoperating RentalIncomeNonoperating	230000	USD
CY2011Q4	us-gaap	Goodwill Gross GoodwillGross	2200000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1700000	USD
CY2021	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P10Y
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	71000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	171000	USD
CY2021Q4	us-gaap	Equity Method Investments EquityMethodInvestments	7572000	USD
CY2020Q4	us-gaap	Equity Method Investments EquityMethodInvestments	6584000	USD
CY2021Q4	unb	Investment Contribution Payable InvestmentContributionPayable	1158000	USD
CY2020Q4	unb	Investment Contribution Payable InvestmentContributionPayable	1351000	USD
CY2021	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	1011000	USD
CY2020	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	935000	USD
CY2021	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	1057000	USD
CY2020	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	987000	USD
CY2021	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	46000	USD
CY2020	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	52000	USD
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Checking InterestBearingDomesticDepositChecking	281638000	USD
CY2020Q4	us-gaap	Interest Bearing Domestic Deposit Checking InterestBearingDomesticDepositChecking	231465000	USD
CY2021Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	441841000	USD
CY2020Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	405904000	USD
CY2021Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	50019000	USD
CY2020Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	70373000	USD
CY2021Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	56696000	USD
CY2020Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	71315000	USD
CY2021Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	830194000	USD
CY2020Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	779057000	USD
CY2020Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	15000000	USD
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	0	USD
CY2021Q4	unb	Reciprocal Deposits ReciprocalDeposits	168900000	USD
CY2020Q4	unb	Reciprocal Deposits ReciprocalDeposits	160500000	USD
CY2021Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	80564000	USD
CY2021Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	10847000	USD
CY2021Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	10315000	USD
CY2021Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	2740000	USD
CY2021Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	2249000	USD
CY2021Q4	us-gaap	Time Deposits TimeDeposits	106715000	USD
CY2021Q4	unb	Time Deposits250000or More TimeDeposits250000orMore	16200000	USD
CY2020Q4	unb	Time Deposits250000or More TimeDeposits250000orMore	22900000	USD
CY2021Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	0	USD
CY2020Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	7200000	USD
CY2021Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	224400000	USD
CY2021Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Maximum Amount Available FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable	138700000	USD
CY2021Q4	unb	Advancesfrom Federal Home Loan Bankand Credit Subjectto Collateralization AdvancesfromFederalHomeLoanBankandCreditSubjecttoCollateralization	22000000	USD
CY2021Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds	116700000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	210000000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Maximum Amount Available FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable	134100000	USD
CY2020Q4	unb	Advancesfrom Federal Home Loan Bankand Credit Subjectto Collateralization AdvancesfromFederalHomeLoanBankandCreditSubjecttoCollateralization	21900000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds	112200000	USD
CY2021Q4	unb	Lettersof Credit Collateralfor Deposits LettersofCreditCollateralforDeposits	37500000	USD
CY2020Q4	unb	Lettersof Credit Collateralfor Deposits LettersofCreditCollateralforDeposits	23600000	USD
CY2021	unb	Lettersof Credit Fees Paidfor Issuance LettersofCreditFeesPaidforIssuance	45000	USD
CY2020	unb	Lettersof Credit Fees Paidfor Issuance LettersofCreditFeesPaidforIssuance	30000	USD
CY2021Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	551000	USD
CY2021Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2020Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2021Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	329000	USD
CY2021	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	11000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	2149000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	3134000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	126000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	62000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	371000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-777000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2646000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2419000	USD
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	3321000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	3197000	USD
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	100000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	49000	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	446000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	555000	USD
CY2021	unb	Effective Income Tax Reconciliation Nontaxable Income Life Insurance EffectiveIncomeTaxReconciliationNontaxableIncomeLifeInsurance	65000	USD
CY2020	unb	Effective Income Tax Reconciliation Nontaxable Income Life Insurance EffectiveIncomeTaxReconciliationNontaxableIncomeLifeInsurance	67000	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	1093000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	1013000	USD
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Amortization IncomeTaxReconciliationNondeductibleExpenseAmortization	842000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Amortization IncomeTaxReconciliationNondeductibleExpenseAmortization	788000	USD
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	24000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	44000	USD
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-37000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-24000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2646000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2419000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	1813000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	1798000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	308000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	300000	USD
CY2021Q4	unb	Deferred Tax Assets Origination Fees DeferredTaxAssetsOriginationFees	121000	USD
CY2020Q4	unb	Deferred Tax Assets Origination Fees DeferredTaxAssetsOriginationFees	0	USD
CY2021Q4	unb	Deferred Tax Assets Loans Held For Sale DeferredTaxAssetsLoansHeldForSale	56000	USD
CY2020Q4	unb	Deferred Tax Assets Loans Held For Sale DeferredTaxAssetsLoansHeldForSale	271000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	109000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	119000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	412000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	0	USD
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	74000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	55000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	2893000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	2543000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1397000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1254000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	543000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	490000	USD
CY2021Q4	unb	Deferred Tax Liabilities Investment In Real Estate Limited Partnerships DeferredTaxLiabilitiesInvestmentInRealEstateLimitedPartnerships	136000	USD
CY2020Q4	unb	Deferred Tax Liabilities Investment In Real Estate Limited Partnerships DeferredTaxLiabilitiesInvestmentInRealEstateLimitedPartnerships	86000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Other Comprehensive Income DeferredTaxLiabilitiesOtherComprehensiveIncome	0	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other Comprehensive Income DeferredTaxLiabilitiesOtherComprehensiveIncome	701000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	341000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	309000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	162000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	132000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2579000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2972000	USD
CY2020	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.03
CY2021	unb	Defined Contribution Plan Company Contributions Vesting Period DefinedContributionPlanCompanyContributionsVestingPeriod	P3Y
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	314000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	429000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2021	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.03
CY2021	unb	Defined Contribution Plan Employer Matching Contribution Amount DefinedContributionPlanEmployerMatchingContributionAmount	320000	USD
CY2020	unb	Defined Contribution Plan Employer Matching Contribution Amount DefinedContributionPlanEmployerMatchingContributionAmount	318000	USD
CY2021	unb	Defined Contribution Plan Profit Sharing Amount DefinedContributionPlanProfitSharingAmount	367000	USD
CY2020	unb	Defined Contribution Plan Profit Sharing Amount DefinedContributionPlanProfitSharingAmount	339000	USD
CY2021	unb	Defined Contribution Plan Employer Safe Harbor Contribution Amount DefinedContributionPlanEmployerSafeHarborContributionAmount	395000	USD
CY2020	unb	Defined Contribution Plan Employer Safe Harbor Contribution Amount DefinedContributionPlanEmployerSafeHarborContributionAmount	382000	USD
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1082000	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1039000	USD
CY2021	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	7000	USD
CY2020	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	8000	USD
CY2021Q4	us-gaap	Deferred Compensation Arrangement With Individual Recorded Liability DeferredCompensationArrangementWithIndividualRecordedLiability	292000	USD
CY2020Q4	us-gaap	Deferred Compensation Arrangement With Individual Recorded Liability DeferredCompensationArrangementWithIndividualRecordedLiability	327000	USD
CY2021Q4	unb	Cash Surrender Value Of Life Insurance Deferred Compensation Plan CashSurrenderValueOfLifeInsuranceDeferredCompensationPlan	1100000	USD
CY2020Q4	unb	Cash Surrender Value Of Life Insurance Deferred Compensation Plan CashSurrenderValueOfLifeInsuranceDeferredCompensationPlan	1100000	USD
CY2021Q4	unb	Unfunded Deferred Compensation Plan General Unsecured Obligation UnfundedDeferredCompensationPlanGeneralUnsecuredObligation	1100000	USD
CY2020Q4	unb	Unfunded Deferred Compensation Plan General Unsecured Obligation UnfundedDeferredCompensationPlanGeneralUnsecuredObligation	1100000	USD
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	24000	USD
CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	24000	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	72000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	22000	USD
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	3000	shares
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1000	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	24.00
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	22.00
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	27000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	14000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	13170000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	12805000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4483791	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4474649	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	25157	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	18508	shares
CY2021	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	4508948	shares
CY2020	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	4493157	shares
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.94
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.86
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.92
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.85
CY2021Q4	us-gaap	Other Commitment OtherCommitment	2700000	USD
CY2020Q4	us-gaap	Other Commitment OtherCommitment	18300000	USD
CY2021Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Face Amount Asset FairValueDisclosureOffbalanceSheetRisksFaceAmountAsset	225072000	USD
CY2020Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Face Amount Asset FairValueDisclosureOffbalanceSheetRisksFaceAmountAsset	200084000	USD
CY2021Q4	unb	Loans Sold To Others Balance At Time Of Sale Since Inception LoansSoldToOthersBalanceAtTimeOfSaleSinceInception	33500000	USD
CY2021Q4	unb	Loans Sold To Other Outstanding Principal Balance LoansSoldToOtherOutstandingPrincipalBalance	9500000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	267819000	USD
CY2021Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	1132000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	105763000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	1047000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	731000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	1300000	USD
CY2021	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	2050000	USD
CY2020	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	1632000	USD
CY2021	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	1635000	USD
CY2020	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	1222000	USD
CY2021	unb	Loans And Leases Receivable Related Parties Other LoansAndLeasesReceivableRelatedPartiesOther	0	USD
CY2020	unb	Loans And Leases Receivable Related Parties Other LoansAndLeasesReceivableRelatedPartiesOther	-979000	USD
CY2021Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	1146000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	731000	USD
CY2020Q4	unb	Trust Division Time Deposit Liability TrustDivisionTimeDepositLiability	266000	USD
CY2021Q4	unb	Loan Commitments And Available Lines Of Credit Related Party LoanCommitmentsAndAvailableLinesOfCreditRelatedParty	571000	USD
CY2020Q4	unb	Loan Commitments And Available Lines Of Credit Related Party LoanCommitmentsAndAvailableLinesOfCreditRelatedParty	1123000	USD
CY2021Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	1600000	USD
CY2020Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	1100000	USD
CY2021Q4	unb	Trust Division Time Deposit Liability TrustDivisionTimeDepositLiability	204000	USD
CY2021Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	2500	shares
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	2000	USD
CY2021Q4	unb	Stock Repurchase Program Numberof Shares Repurchased Since Inception StockRepurchaseProgramNumberofSharesRepurchasedSinceInception	17790	shares
CY2021	unb	Treasury Stock Acquired Since Inception Cost Per Share Low Range TreasuryStockAcquiredSinceInceptionCostPerShareLowRange	17.86
CY2021	unb	Treasury Stock Acquired Since Inception Cost Per Share High Range TreasuryStockAcquiredSinceInceptionCostPerShareHighRange	48.82
CY2021Q4	unb	Stock Repurchase Program Total Costof Shares Repurchased Since Inception StockRepurchaseProgramTotalCostofSharesRepurchasedSinceInception	474000	USD
CY2021	unb	Stock Reserved Shares Dividend Reinvestment Plan StockReservedSharesDividendReinvestmentPlan	200000	shares
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1552000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	2636000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-5300000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1112000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-4188000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	2099000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	440000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1659000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	9000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	11000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	2000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-5300000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-1112000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4188000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	2088000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	438000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1650000	USD
CY2021Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.33
CY2021Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9500000	USD
CY2021Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9898000	USD
CY2021Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9852000	USD
CY2021Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10023000	USD
CY2021Q1	us-gaap	Interest Expense InterestExpense	1101000	USD
CY2021Q2	us-gaap	Interest Expense InterestExpense	979000	USD
CY2021Q3	us-gaap	Interest Expense InterestExpense	706000	USD
CY2021Q4	us-gaap	Interest Expense InterestExpense	779000	USD
CY2021Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8399000	USD
CY2021Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8919000	USD
CY2021Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9146000	USD
CY2021Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9244000	USD
CY2021Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	150000	USD
CY2021Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	75000	USD
CY2021Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0	USD
CY2021Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-225000	USD
CY2021Q1	us-gaap	Noninterest Income NoninterestIncome	2621000	USD
CY2021Q2	us-gaap	Noninterest Income NoninterestIncome	3139000	USD
CY2021Q3	us-gaap	Noninterest Income NoninterestIncome	4201000	USD
CY2021Q4	us-gaap	Noninterest Income NoninterestIncome	3002000	USD
CY2021Q1	us-gaap	Noninterest Expense NoninterestExpense	7453000	USD
CY2021Q2	us-gaap	Noninterest Expense NoninterestExpense	8389000	USD
CY2021Q3	us-gaap	Noninterest Expense NoninterestExpense	8548000	USD
CY2021Q4	us-gaap	Noninterest Expense NoninterestExpense	8465000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	2876000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	2991000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	3925000	USD
CY2021Q4	us-gaap	Net Income Loss NetIncomeLoss	3378000	USD
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.64
CY2021Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.67
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.87
CY2021Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.76
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.64
CY2021Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.66
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.87
CY2021Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.75
CY2020Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	8963000	USD
CY2020Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9139000	USD
CY2020Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9343000	USD
CY2020Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9305000	USD
CY2020Q1	us-gaap	Interest Expense InterestExpense	1457000	USD
CY2020Q2	us-gaap	Interest Expense InterestExpense	1361000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	1158000	USD
CY2020Q4	us-gaap	Interest Expense InterestExpense	1171000	USD
CY2020Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	7506000	USD
CY2020Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	7778000	USD
CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8185000	USD
CY2020Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8134000	USD
CY2020Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	300000	USD
CY2020Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	500000	USD
CY2020Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	800000	USD
CY2020Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	600000	USD
CY2020Q1	us-gaap	Noninterest Income NoninterestIncome	2518000	USD
CY2020Q2	us-gaap	Noninterest Income NoninterestIncome	2988000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	5508000	USD
CY2020Q4	us-gaap	Noninterest Income NoninterestIncome	4989000	USD
CY2020Q1	us-gaap	Noninterest Expense NoninterestExpense	7172000	USD
CY2020Q2	us-gaap	Noninterest Expense NoninterestExpense	7111000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	7995000	USD
CY2020Q4	us-gaap	Noninterest Expense NoninterestExpense	7904000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	2196000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	2668000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	4147000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	3794000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.60
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.92
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.49
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.59
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.92
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.85
CY2021	unb	Noninterest Income Mortgage Servicing Rights Net NoninterestIncomeMortgageServicingRightsNet	243000	USD
CY2020	unb	Noninterest Income Mortgage Servicing Rights Net NoninterestIncomeMortgageServicingRightsNet	542000	USD
CY2021	us-gaap	Noninterest Income Other NoninterestIncomeOther	461000	USD
CY2020	us-gaap	Noninterest Income Other NoninterestIncomeOther	411000	USD
CY2021	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	704000	USD
CY2020	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	953000	USD
CY2021	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	968000	USD
CY2020	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	759000	USD
CY2021	us-gaap	Professional Fees ProfessionalFees	922000	USD
CY2020	us-gaap	Professional Fees ProfessionalFees	774000	USD
CY2021	unb	Atm And Debit Card Expense ATMAndDebitCardExpense	898000	USD
CY2020	unb	Atm And Debit Card Expense ATMAndDebitCardExpense	800000	USD
CY2021	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	644000	USD
CY2020	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	443000	USD
CY2021	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	530000	USD
CY2020	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	544000	USD
CY2021	unb	Director And Advisory Board Fees DirectorAndAdvisoryBoardFees	524000	USD
CY2020	unb	Director And Advisory Board Fees DirectorAndAdvisoryBoardFees	505000	USD
CY2021	unb	Other Noninterest Expenses OtherNoninterestExpenses	3991000	USD
CY2020	unb	Other Noninterest Expenses OtherNoninterestExpenses	3695000	USD
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	8477000	USD
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	7520000	USD
CY2021	dei	Auditor Name AuditorName	Berry Dunn McNeil & Parker, LLC
CY2021	dei	Auditor Location AuditorLocation	Portland, Maine
CY2021	dei	Auditor Firm AuditorFirmId	136

Files In Submission

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2021 Q4 Form 10-K Financial Statement

#000070686322000020 Filed on March 24, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$UNB Union Bankshares Inc Stock $unb

2021 Q4 Form 10-K Financial Statement

#000070686322000020 Filed on March 24, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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Union Bankshares Inc Stock $unb