$COFS
CHOICEONE FINANCIAL SERVICES INC Stock $cofs

$cofs Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000143774921007939 Filed on April 01, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2019 Q3
Revenue	$15.04M	$12.88M	$6.561M
YoY Change	16.76%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$2.300M	$1.410M	$570.0K
YoY Change	63.12%	171.15%	11.76%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense			$991.0K
YoY Change
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$4.910M	$3.650M	$1.127M
YoY Change	34.52%	83.42%	-52.25%
Income Tax	$810.0K	$620.0K	$106.0K
% Of Pretax Income	16.5%	16.99%	9.41%
Net Earnings	$4.100M	$3.027M	$1.021M
YoY Change	35.45%	65.41%	-49.2%
Net Earnings / Revenue	27.26%	23.5%	15.56%
Basic Earnings Per Share	$0.53	$0.44	$0.28
Diluted Earnings Per Share	$0.52	$0.44	$0.28
COMMON SHARES
Basic Shares Outstanding	7.795M		3.633M
Diluted Shares Outstanding			3.657M

Balance Sheet

Concept	2020 Q4	2019 Q4	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$79.52M	$59.56M	$16.57M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$29.49M	$24.27M	$15.30M
YoY Change	21.53%	52.61%	2.68%
Goodwill	$60.51M	$52.87M
YoY Change	14.44%	285.13%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.919B	$1.386B	$663.6M
YoY Change	38.47%	106.73%	2.06%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt		$0.00	$0.00
YoY Change		-100.0%	-100.0%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities
YoY Change
LONG-TERM LIABILITIES
Long-Term Debt	$3.100M	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$5.100M	$6.200M	$4.700M
YoY Change	-17.74%	106.67%	46.88%
Total Long-Term Liabilities	$8.200M	$6.200M	$4.700M
YoY Change	32.26%	106.67%	46.88%
TOTAL LIABILITIES
Total Short-Term Liabilities
Total Long-Term Liabilities	$8.200M	$6.200M	$4.700M
Total Liabilities	$1.692B	$1.194B	$579.0M
YoY Change	41.72%	102.34%	1.01%
SHAREHOLDERS EQUITY
Retained Earnings	$37.49M	$28.05M
YoY Change	33.65%
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$227.3M	$192.1M	$84.63M
YoY Change
Total Liabilities & Shareholders Equity	$1.919B	$1.386B	$663.6M
YoY Change	38.47%	106.73%	2.06%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2019 Q3
OPERATING ACTIVITIES
Net Income	$4.100M	$3.027M	$1.021M
YoY Change	35.45%	65.41%	-49.2%
Depreciation, Depletion And Amortization	$2.300M	$1.410M	$570.0K
YoY Change	63.12%	171.15%	11.76%
Cash From Operating Activities	$28.74M	$3.780M	$2.960M
YoY Change	660.32%	27.7%	30.97%
INVESTING ACTIVITIES
Capital Expenditures	-$300.0K	-$310.0K	-$140.0K
YoY Change	-3.23%	-77.86%	-91.62%
Acquisitions
YoY Change
Other Investing Activities	-$152.5M	$28.18M	-$2.340M
YoY Change	-641.06%	-321.37%	-84.63%
Cash From Investing Activities	-$152.8M	$27.87M	-$2.480M
YoY Change	-648.15%	-297.24%	-85.31%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	85.67M	11.33M	2.400M
YoY Change	656.13%	-31.0%	-86.04%
NET CHANGE
Cash From Operating Activities	28.74M	3.780M	2.960M
Cash From Investing Activities	-152.8M	27.87M	-2.480M
Cash From Financing Activities	85.67M	11.33M	2.400M
Net Change In Cash	-38.36M	42.98M	2.880M
YoY Change	-189.25%	718.67%	12.06%
FREE CASH FLOW
Cash From Operating Activities	$28.74M	$3.780M	$2.960M
Capital Expenditures	-$300.0K	-$310.0K	-$140.0K
Free Cash Flow	$29.04M	$4.090M	$3.100M
YoY Change	610.02%	-6.19%	-21.12%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2018	us-gaap	Noninterest Expense NoninterestExpense	20461000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	18885000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	8465000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	8488000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3272000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1294000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1155000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	15613000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	7171000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	7333000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.58
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.03
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.07
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.58
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.02
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.82
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.40
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.71
CY2020	us-gaap	Net Income Loss NetIncomeLoss	15613000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	7171000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	7333000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	10708000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	2246000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-737000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	1033000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	18000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	27000	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	125000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	18000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-39000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	9550000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2210000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-725000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	25163000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	9381000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	6608000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	76550000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	7333000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-725000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	373000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	344000	USD
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	126000	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	523000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Employee Stock Purchase Program Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition	13000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	0	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	282000	USD
CY2018	cofs	Stock Dividend Declared Equity Impact StockDividendDeclaredEquityImpact	-7000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	80477000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	7171000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2210000	USD
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	25000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	67000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Employee Stock Purchase Program Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition	14000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	78000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	398000	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2019	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	107639000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5806000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	192139000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	15613000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	9550000	USD
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	451000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Employee Stock Purchase Program Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition	24000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	0	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	171000	USD
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2020	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	15494000	USD
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	6174000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	227268000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	15613000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	7171000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	7333000	USD
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	4000000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	35000	USD
CY2020	us-gaap	Depreciation Depreciation	2721000	USD
CY2019	us-gaap	Depreciation Depreciation	1610000	USD
CY2018	us-gaap	Depreciation Depreciation	1183000	USD
CY2020	us-gaap	Adjustment For Amortization AdjustmentForAmortization	4985000	USD
CY2019	us-gaap	Adjustment For Amortization AdjustmentForAmortization	1517000	USD
CY2018	us-gaap	Adjustment For Amortization AdjustmentForAmortization	893000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	512000	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	1308000	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	22000	USD
CY2018	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	34000	USD
CY2020	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-155000	USD
CY2019	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-0	USD
CY2018	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	71000	USD
CY2020	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	11313000	USD
CY2019	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	1951000	USD
CY2018	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	1003000	USD
CY2020	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	326286000	USD
CY2019	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	63920000	USD
CY2018	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	24366000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1852000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	766000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	178450000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	2634000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	0	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	463000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	91000	USD
CY2018	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	33555000	USD
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	325306000	USD
CY2019	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	62763000	USD
CY2018	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	34872000	USD
CY2020	cofs	Bank Owned Life Insurance Income Operating Activities BankOwnedLifeInsuranceIncomeOperatingActivities	772000	USD
CY2019	cofs	Bank Owned Life Insurance Income Operating Activities BankOwnedLifeInsuranceIncomeOperatingActivities	485000	USD
CY2018	cofs	Bank Owned Life Insurance Income Operating Activities BankOwnedLifeInsuranceIncomeOperatingActivities	385000	USD
CY2020	cofs	Earnings On Death Benefit From Bank Owned Life Insurance EarningsOnDeathBenefitFromBankOwnedLifeInsurance	0	USD
CY2019	cofs	Earnings On Death Benefit From Bank Owned Life Insurance EarningsOnDeathBenefitFromBankOwnedLifeInsurance	-288000	USD
CY2018	cofs	Earnings On Death Benefit From Bank Owned Life Insurance EarningsOnDeathBenefitFromBankOwnedLifeInsurance	0	USD
CY2020	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	64000	USD
CY2019	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	54000	USD
CY2018	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	79000	USD
CY2020	cofs	Write Downs Of Other Real Estate WriteDownsOfOtherRealEstate	80000	USD
CY2019	cofs	Write Downs Of Other Real Estate WriteDownsOfOtherRealEstate	0	USD
CY2018	cofs	Write Downs Of Other Real Estate WriteDownsOfOtherRealEstate	0	USD
CY2020	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	1384000	USD
CY2019	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	938000	USD
CY2018	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	515000	USD
CY2020	cofs	Proceeds From Costs Capitalized To Other Real Estate ProceedsFromCostsCapitalizedToOtherRealEstate	-19000	USD
CY2019	cofs	Proceeds From Costs Capitalized To Other Real Estate ProceedsFromCostsCapitalizedToOtherRealEstate	0	USD
CY2018	cofs	Proceeds From Costs Capitalized To Other Real Estate ProceedsFromCostsCapitalizedToOtherRealEstate	0	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	202000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	310000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	209000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3186000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-2128000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	875000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-3532000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-1493000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	573000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	8478000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	9202000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	9955000	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	121942000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	48787000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	47816000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	13443000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	375670000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	209763000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	31450000	USD
CY2020	us-gaap	Payments To Acquire Federal Reserve Stock PaymentsToAcquireFederalReserveStock	-0	USD
CY2019	us-gaap	Payments To Acquire Federal Reserve Stock PaymentsToAcquireFederalReserveStock	1000	USD
CY2018	us-gaap	Payments To Acquire Federal Reserve Stock PaymentsToAcquireFederalReserveStock	-0	USD
CY2020	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	79594000	USD
CY2019	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	485000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	36352000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-43855000	USD
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	292145000	USD
CY2019	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	3986000	USD
CY2018	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	37162000	USD
CY2020	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	142000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	77000	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	6174000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	5815000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	2580000	USD
CY2020	cofs	Cash Related To Equity Issuance For Merger CashRelatedToEquityIssuanceForMerger	-0	USD
CY2019	cofs	Cash Related To Equity Issuance For Merger CashRelatedToEquityIssuanceForMerger	297000	USD
CY2018	cofs	Cash Related To Equity Issuance For Merger CashRelatedToEquityIssuanceForMerger	-0	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	262234000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-5686000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	16753000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	19961000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	39868000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-17147000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	59558000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	19690000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	36837000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	79519000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4207000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-250751000	USD
CY2019	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	0	USD
CY2018	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-7148000	USD
CY2020	us-gaap	Increase Decrease In Federal Funds Purchased IncreaseDecreaseInFederalFundsPurchased	-0	USD
CY2019	us-gaap	Increase Decrease In Federal Funds Purchased IncreaseDecreaseInFederalFundsPurchased	8600000	USD
CY2018	us-gaap	Increase Decrease In Federal Funds Purchased IncreaseDecreaseInFederalFundsPurchased	-4800000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	10050000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	115000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	128500000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	33921000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	110035000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	143535000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	-0	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	67000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	523000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	134000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	59558000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	19690000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	4872000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	4500000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	2300000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	5001000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1035000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	850000	USD
CY2020	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	372000	USD
CY2019	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	347000	USD
CY2018	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	432000	USD
CY2020	cofs	Participating Interest In Loans Losses Or Chargeoffs ParticipatingInterestInLoansLossesOrChargeoffs	0	USD
CY2020	us-gaap	Allowance For Loan And Lease Losses Period Increase Decrease AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease	4000000.0	USD
CY2020Q4	cofs	Financing Receivable Number Of Payment Deferrals FinancingReceivableNumberOfPaymentDeferrals	750	pure
CY2020Q4	cofs	Financing Receivable Deferred Payments Remained Active FinancingReceivableDeferredPaymentsRemainedActive	3200000	USD
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"><b>Use of Estimates</b></p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;">To prepare financial statements in conformity with accounting principles generally accepted in the United States of America, ChoiceOne’s management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided. These estimates and assumptions are subject to many risks and uncertainties, including changes in interest rates and other general economic, business and political conditions, including the effects of the COVID-<em style="font: inherit;">19</em> pandemic, and its potential effects on the economic environment, our customers and our operations, as well as any changes to federal, state and local government laws, regulations and orders in connection with the pandemic. Actual results <em style="font: inherit;"> may </em>differ from these estimates. Estimates associated with securities available for sale, the allowance for loan losses, other real estate owned, loan servicing rights, goodwill, and fair values of certain financial instruments are particularly susceptible to change.</p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"> </p>
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	339579000	USD
CY2020Q4	cofs	Financing Receivable Deferred Payments FinancingReceivableDeferredPayments	148000000	USD
CY2020Q4	cofs	Financing Receivable Deferred Payments Remained Active FinancingReceivableDeferredPaymentsRemainedActive	3200000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	2836000	USD
CY2020	us-gaap	Equity Securities Fv Ni Unrealized Gain EquitySecuritiesFvNiUnrealizedGain	60000	USD
CY2020	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	-0	USD
CY2019Q4	us-gaap	Cash Pass Through Reserve Federal Home Loan Bank CashPassThroughReserveFederalHomeLoanBank	13231000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	13959000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1713000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-0	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-158000	USD
CY2020Q4	cofs	Accumulated Other Comprehensive Income Loss Tax AccumulatedOtherComprehensiveIncomeLossTax	2931000	USD
CY2019Q4	cofs	Accumulated Other Comprehensive Income Loss Tax AccumulatedOtherComprehensiveIncomeLossTax	393000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	11028000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	1478000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	2896000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	2426000	USD
CY2018	cofs	Marketable Securities Realized Gain MarketableSecuritiesRealizedGain	42000	USD
CY2020	cofs	Marketable Securities Realized Loss MarketableSecuritiesRealizedLoss	0	USD
CY2019	cofs	Marketable Securities Realized Loss MarketableSecuritiesRealizedLoss	0	USD
CY2018	cofs	Marketable Securities Realized Loss MarketableSecuritiesRealizedLoss	8000	USD
CY2019	us-gaap	Equity Securities Fv Ni Unrealized Gain EquitySecuritiesFvNiUnrealizedGain	425000	USD
CY2019	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	-0	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	2851000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	560828000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	14856000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	897000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	574787000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	337865000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	3340000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1626000	USD
CY2020Q4	us-gaap	Cash Pass Through Reserve Federal Home Loan Bank CashPassThroughReserveFederalHomeLoanBank	0	USD
CY2020	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"><b>Reclassifications</b><br/> Certain amounts presented in prior year consolidated financial statements have been reclassified to conform to the <em style="font: inherit;">2020</em> presentation.</p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"> </p>
CY2020	cofs	Proceeds From Sale Securities ProceedsFromSaleSecurities	121942000	USD
CY2019	cofs	Proceeds From Sale Securities ProceedsFromSaleSecurities	178913000	USD
CY2018	cofs	Proceeds From Sale Securities ProceedsFromSaleSecurities	2634000	USD
CY2020	cofs	Marketable Securities Realized Gain MarketableSecuritiesRealizedGain	1308000	USD
CY2019	cofs	Marketable Securities Realized Gain MarketableSecuritiesRealizedGain	22000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	17050000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	17184000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	59120000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	60900000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	221304000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	231775000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	17269000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	18205000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	314743000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	328064000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	2836000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	2896000	USD
CY2020Q4	cofs	Debt Securities Available For Sale And Equity Securities Fvni Amortized Cost DebtSecuritiesAvailableForSaleAndEquitySecuritiesFvniAmortizedCost	563664000	USD
CY2020Q4	cofs	Debt Securities Available For Sale And Equity Securities Fvni Total DebtSecuritiesAvailableForSaleAndEquitySecuritiesFvniTotal	577683000	USD
CY2020Q4	us-gaap	Pledged Assets Separately Reported Securities Pledged For Repurchase Agreements At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedForRepurchaseAgreementsAtFairValue	278000	USD
CY2019Q4	us-gaap	Pledged Assets Separately Reported Securities Pledged For Repurchase Agreements At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedForRepurchaseAgreementsAtFairValue	252000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	84529000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	891000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	9994000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	6000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	94523000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	897000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	191926000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1622000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	925000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	4000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	192851000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1626000	USD
CY2020	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	0	USD
CY2020	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-155000	USD
CY2019	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	0	USD
CY2018	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	71000	USD
CY2020	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	0	USD
CY2019	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	-5000	USD
CY2018	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	9000	USD
CY2020	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-155000	USD
CY2019	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	5000	USD
CY2018	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	62000	USD
CY2020Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	22	pure
CY2019Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	63	pure
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1069668000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	802048000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	7593000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	4057000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1062075000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	797991000	USD
CY2019Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	0	USD
CY2019Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	0	USD
CY2019Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	0	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	4057000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	754000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	290000	USD
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	4000000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	7593000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	431000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	7162000	USD
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	7851000	USD
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1039745000	USD
CY2020Q4	cofs	Financing Receivable Acquired With Deteriorated Credit Quality FinancingReceivableAcquiredWithDeterioratedCreditQuality	22072000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1069668000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	4673000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	989000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	373000	USD
CY2019	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	0	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	4057000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	355000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	3702000	USD
CY2019Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	5922000	USD
CY2019Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	788397000	USD
CY2019Q4	cofs	Financing Receivable Acquired With Deteriorated Credit Quality FinancingReceivableAcquiredWithDeterioratedCreditQuality	7729000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	802048000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	4577000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	365000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	426000	USD
CY2018	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	35000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	4673000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	297000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	4376000	USD
CY2018Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	4024000	USD
CY2018Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	405049000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	409073000	USD
CY2020Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	337000	USD
CY2019Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	173000	USD
CY2019	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	pure
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	5	pure
CY2020	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	1967000	USD
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	1967000	USD
CY2020Q4	cofs	Financing Receivable Number Of Payment Deferrals FinancingReceivableNumberOfPaymentDeferrals	750	pure
CY2020Q4	cofs	Financing Receivable Deferred Payments FinancingReceivableDeferredPayments	148000000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	3958000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	4969000	USD
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	2404000	USD
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	19000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	3893000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	3986000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	431000	USD
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	3506000	USD
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	134000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	7851000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	8955000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	431000	USD
CY2020	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	5910000	USD
CY2020	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	153000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	2728000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	3398000	USD
CY2019	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	1165000	USD
CY2019	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	53000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	3194000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	3323000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	355000	USD
CY2019	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	3983000	USD
CY2019	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	116000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	5922000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	6721000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	355000	USD
CY2019	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	5148000	USD
CY2019	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	169000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	510000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	556000	USD
CY2018	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	631000	USD
CY2018	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	154000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	3514000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	3652000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	297000	USD
CY2018	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	3731000	USD
CY2018	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	19000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	4024000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	4209000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	297000	USD
CY2018	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	4362000	USD
CY2018	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	173000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	6490000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	1063178000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1069668000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	6358000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	795690000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	802048000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	6707000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	4687000	USD
CY2020	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	326286000	USD
CY2019	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	63920000	USD
CY2020Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	3967000	USD
CY2019Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	2131000	USD
CY2018Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	1049000	USD
CY2020Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	3967000	USD
CY2019Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	2304000	USD
CY2020Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	373000	USD
CY2018	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	33555000	USD
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	325306000	USD
CY2019	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	62763000	USD
CY2018	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	34872000	USD
CY2020	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	11313000	USD
CY2019	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	1951000	USD
CY2018	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	1003000	USD
CY2020	cofs	Loan Servicing Fees Net LoanServicingFeesNet	-129000	USD
CY2019	cofs	Loan Servicing Fees Net LoanServicingFeesNet	82000	USD
CY2018	cofs	Loan Servicing Fees Net LoanServicingFeesNet	91000	USD
CY2020Q4	cofs	Mortgage Loans Serviced For Others MortgageLoansServicedForOthers	404200000	USD
CY2019Q4	cofs	Mortgage Loans Serviced For Others MortgageLoansServicedForOthers	242000000.0	USD
CY2019Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	2131000	USD
CY2018Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	1049000	USD
CY2017Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	908000	USD
CY2020	cofs	Servicing Asset At Amortized Cost Capitalized ServicingAssetAtAmortizedCostCapitalized	3554000	USD
CY2019	cofs	Servicing Asset At Amortized Cost Capitalized ServicingAssetAtAmortizedCostCapitalized	822000	USD
CY2018	cofs	Servicing Asset At Amortized Cost Capitalized ServicingAssetAtAmortizedCostCapitalized	441000	USD
CY2020	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	1344000	USD
CY2019	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	453000	USD
CY2018	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	300000	USD
CY2020	us-gaap	Servicing Asset At Amortized Value Valuation Allowance ServicingAssetAtAmortizedValueValuationAllowance	-374000	USD
CY2019	us-gaap	Servicing Asset At Amortized Value Valuation Allowance ServicingAssetAtAmortizedValueValuationAllowance	0	USD
CY2018	us-gaap	Servicing Asset At Amortized Value Valuation Allowance ServicingAssetAtAmortizedValueValuationAllowance	0	USD
CY2020	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	0	USD
CY2019	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	713000	USD
CY2018	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	0	USD
CY2019Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	0	USD
CY2020	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.0775	pure
CY2019	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.0551	pure
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	45494000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	38943000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	16005000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	14678000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	29489000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24265000	USD
CY2020	us-gaap	Depreciation Depreciation	2721000	USD
CY2019	us-gaap	Depreciation Depreciation	1610000	USD
CY2018	us-gaap	Depreciation Depreciation	1183000	USD
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	83000	USD
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	72000	USD
CY2018	us-gaap	Operating Lease Expense OperatingLeaseExpense	108000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	138000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	120000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	75000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	28000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	14000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	375000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	15000	USD
CY2019Q4	us-gaap	Interest Bearing Domestic Deposit Certificates Of Deposits InterestBearingDomesticDepositCertificatesOfDeposits	158985000	USD
CY2020Q4	cofs	Interest Bearing And Noninterest Bearing Deposit Brokered InterestBearingAndNoninterestBearingDepositBrokered	0	USD
CY2019Q4	cofs	Interest Bearing And Noninterest Bearing Deposit Brokered InterestBearingAndNoninterestBearingDepositBrokered	2287000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	52870000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	13728000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	60506000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	52870000	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	79000	USD
CY2020Q4	us-gaap	Other Real Estate OtherRealEstate	266000	USD
CY2019Q4	us-gaap	Other Real Estate OtherRealEstate	929000	USD
CY2018Q4	us-gaap	Other Real Estate OtherRealEstate	102000	USD
CY2020Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	61000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	40000	USD
CY2020Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	161000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.17	pure
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.15	pure
CY2020Q4	us-gaap	Deposits Deposits	1674578000	USD
CY2019Q4	us-gaap	Deposits Deposits	1154602000	USD
CY2019Q4	us-gaap	Other Real Estate OtherRealEstate	929000	USD
CY2018Q4	us-gaap	Other Real Estate OtherRealEstate	102000	USD
CY2017Q4	us-gaap	Other Real Estate OtherRealEstate	106000	USD
CY2020	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	391000	USD
CY2019	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	347000	USD
CY2018	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	432000	USD
CY2020	us-gaap	Other Real Estate Additions OtherRealEstateAdditions	346000	USD
CY2019	us-gaap	Other Real Estate Additions OtherRealEstateAdditions	1364000	USD
CY2018	us-gaap	Other Real Estate Additions OtherRealEstateAdditions	0	USD
CY2020	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1384000	USD
CY2019	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	938000	USD
CY2018	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	515000	USD
CY2020	cofs	Write Downs Of Other Real Estate WriteDownsOfOtherRealEstate	80000	USD
CY2019	cofs	Write Downs Of Other Real Estate WriteDownsOfOtherRealEstate	-0	USD
CY2018	cofs	Write Downs Of Other Real Estate WriteDownsOfOtherRealEstate	-0	USD
CY2020	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	64000	USD
CY2019	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	54000	USD
CY2019Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	175000	USD
CY2018Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	102000	USD
CY2020Q4	cofs	Commercial Real Estate Loans CommercialRealEstateLoans	205000	USD
CY2019Q4	cofs	Commercial Real Estate Loans CommercialRealEstateLoans	754000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	39000	USD
CY2020Q4	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	477654000	USD
CY2019Q4	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	287460000	USD
CY2020Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	471346000	USD
CY2019Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	236154000	USD
CY2020Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	191681000	USD
CY2019Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	263666000	USD
CY2020Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	337332000	USD
CY2019Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	206050000	USD
CY2020Q4	us-gaap	Interest Bearing Domestic Deposit Certificates Of Deposits InterestBearingDomesticDepositCertificatesOfDeposits	196565000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	156612000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	22001000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	9790000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	4181000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	3656000	USD
CY2020Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	325000	USD
CY2020Q4	us-gaap	Time Deposits TimeDeposits	196565000	USD
CY2020Q4	cofs	Time Deposits250000 Or More TimeDeposits250000OrMore	88200000	USD
CY2019Q4	cofs	Time Deposits250000 Or More TimeDeposits250000OrMore	68300000	USD
CY2020Q4	cofs	Interest Bearing And Noninterest Bearing Deposit Brokered InterestBearingAndNoninterestBearingDepositBrokered	0	USD
CY2019Q4	cofs	Interest Bearing And Noninterest Bearing Deposit Brokered InterestBearingAndNoninterestBearingDepositBrokered	2300000	USD
CY2020Q4	cofs	Certificates Of Deposit Issued Through Cdars CertificatesOfDepositIssuedThroughCDARS	12700000	USD
CY2019Q4	cofs	Certificates Of Deposit Issued Through Cdars CertificatesOfDepositIssuedThroughCDARS	7100000	USD
CY2018	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	81000	USD
CY2020Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	161000	USD
CY2019Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	33198000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds	85600000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	40000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	42000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3070000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	984000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	946000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	202000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	310000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	209000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3272000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1294000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1155000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	3966000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1778000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1783000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	574000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	320000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	309000	USD
CY2020	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	162000	USD
CY2019	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	162000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	240000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	218000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	154000	USD
CY2020	cofs	Effective Income Tax Rate Reconciliation Acquisition Of Business Amount EffectiveIncomeTaxRateReconciliationAcquisitionOfBusinessAmount	182000	USD
CY2019	cofs	Effective Income Tax Rate Reconciliation Acquisition Of Business Amount EffectiveIncomeTaxRateReconciliationAcquisitionOfBusinessAmount	164000	USD
CY2018	cofs	Effective Income Tax Rate Reconciliation Acquisition Of Business Amount EffectiveIncomeTaxRateReconciliationAcquisitionOfBusinessAmount	0	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	100000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	52000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-84000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3272000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1294000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1155000	USD
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.14	pure
CY2020Q4	cofs	Deferred Tax Assets Purchase Accounting Adjustments DeferredTaxAssetsPurchaseAccountingAdjustments	1953000	USD
CY2019Q4	cofs	Deferred Tax Assets Purchase Accounting Adjustments DeferredTaxAssetsPurchaseAccountingAdjustments	1129000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	1595000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	585000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	851000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	466000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	301000	USD
CY2020Q4	cofs	Deferred Tax Asses Writedowns Of Other Real Estate Owned DeferredTaxAssesWritedownsOfOtherRealEstateOwned	326000	USD
CY2019Q4	cofs	Deferred Tax Asses Writedowns Of Other Real Estate Owned DeferredTaxAssesWritedownsOfOtherRealEstateOwned	169000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	380000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	198000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	5571000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	2382000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	2931000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	360000	USD
CY2020Q4	cofs	Deferred Tax Liabilities Purchase Accounting Adjustments DeferredTaxLiabilitiesPurchaseAccountingAdjustments	1403000	USD
CY2019Q4	cofs	Deferred Tax Liabilities Purchase Accounting Adjustments DeferredTaxLiabilitiesPurchaseAccountingAdjustments	1285000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	833000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	447000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	653000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	778000	USD
CY2020Q4	cofs	Deferred Tax Liabilities Interest Rate Lock Commitments DeferredTaxLiabilitiesInterestRateLockCommitments	177000	USD
CY2019Q4	cofs	Deferred Tax Liabilities Interest Rate Lock Commitments DeferredTaxLiabilitiesInterestRateLockCommitments	14000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	230000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	221000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	6227000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	3105000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	656000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	723000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	10563000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	5343000	USD
CY2020	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	12211000	USD
CY2019	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	2988000	USD
CY2020	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	5125000	USD
CY2019	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	3372000	USD
CY2020	cofs	Loans And Leases Receivable Related Parties Effect Of Changes In Related Parties LoansAndLeasesReceivableRelatedPartiesEffectOfChangesInRelatedParties	0	USD
CY2019	cofs	Loans And Leases Receivable Related Parties Effect Of Changes In Related Parties LoansAndLeasesReceivableRelatedPartiesEffectOfChangesInRelatedParties	-4664000	USD
CY2020	cofs	Loans And Leases Receivable Related Parties Acquired LoansAndLeasesReceivableRelatedPartiesAcquired	3075000	USD
CY2019	cofs	Loans And Leases Receivable Related Parties Acquired LoansAndLeasesReceivableRelatedPartiesAcquired	10268000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	20724000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	10563000	USD
CY2020Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	14700000	USD
CY2019Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	9000000.0	USD
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.53
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	57748
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	23.39
CY2019Q4	cofs	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue	3.36
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	35617
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	22.33
CY2020	cofs	Share Based Compensation Arrangement By Share Based Payment Award Options Exercised Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedWeightedAverageGrantDateFairValue	3.31
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	1500
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	27.25
CY2020	cofs	Sharebased Compensation Arrangement By Sharebased Payment Award Options Forfeited Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeitedWeightedAverageGrantDateFairValue	3.64
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	20631
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	25.30
CY2020Q4	cofs	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue	3.46
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	8631
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	22.60
CY2020Q4	cofs	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageGrantDateFairValue	3.22
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y4M24D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	82000	USD
CY2020Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	71000	USD
CY2020Q4	us-gaap	Share Price SharePrice	30.81
CY2019	cofs	Sharebased Compensation Arrangement By Sharebased Payment Award Options Grants In Period Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsGrantsInPeriodGrantDateFairValue	49000	USD
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	19000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.49
CY2020Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	15040000	USD
CY2020Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	13992000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	4100000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	15613000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	7171000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	7333000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7521771
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4528786
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	3614302
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.58
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.03
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	15613000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	7171000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	7333000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7521771
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4528786
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	3614302
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	9846
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	10489
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	13825
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7531617
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4539275
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	3628127
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.07
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.58
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.02
CY2020	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.05	pure
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	1642000	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	2091000	USD
CY2019	cofs	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Acquisition FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAcquisition	2756000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	3254000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.45
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.45
CY2020Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	12863000	USD
CY2020Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11879000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	4430000	USD
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
CY2020	cofs	Unused Lines Of Credit And Letters Of Credit Fixed Rate UnusedLinesOfCreditAndLettersOfCreditFixedRate	48622000	USD
CY2020	cofs	Unused Lines Of Credit And Letters Of Credit Variable Rate UnusedLinesOfCreditAndLettersOfCreditVariableRate	231667000	USD
CY2019	cofs	Unused Lines Of Credit And Letters Of Credit Fixed Rate UnusedLinesOfCreditAndLettersOfCreditFixedRate	38064000	USD
CY2019	cofs	Unused Lines Of Credit And Letters Of Credit Variable Rate UnusedLinesOfCreditAndLettersOfCreditVariableRate	177447000	USD
CY2020	us-gaap	Loans And Leases Receivable Commitments Fixed Rates LoansAndLeasesReceivableCommitmentsFixedRates	10691000	USD
CY2020	us-gaap	Loans And Leases Receivable Commitments Variable Rates LoansAndLeasesReceivableCommitmentsVariableRates	3954000	USD
CY2019	us-gaap	Loans And Leases Receivable Commitments Fixed Rates LoansAndLeasesReceivableCommitmentsFixedRates	18216000	USD
CY2019	us-gaap	Loans And Leases Receivable Commitments Variable Rates LoansAndLeasesReceivableCommitmentsVariableRates	4580000	USD
CY2020Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments Without Regulatory Approval StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval	14900000	USD
CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	5570000	USD
CY2020Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	12662000	USD
CY2020Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11138000	USD
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.61
CY2020Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	15150000	USD
CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	14062000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	3829000	USD
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.52
CY2019Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	6477000	USD
CY2019Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	5496000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	1637000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.45
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.45
CY2019Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	6554000	USD
CY2019Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	5501000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	1486000	USD
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.41
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.41
CY2019Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	6561000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	1021000	USD
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2019Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	12881000	USD
CY2019Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11206000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	3027000	USD
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.44
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.44

Files In Submission

Name	View Source	Status
0001437749-21-007939-index-headers.html	Edgar Link	pending
0001437749-21-007939-index.html	Edgar Link	pending
0001437749-21-007939.txt	Edgar Link	pending
0001437749-21-007939-xbrl.zip	Edgar Link	pending
cofs-20201231.xsd	Edgar Link	pending
cofs-20201231_cal.xml	Edgar Link	unprocessable
cofs-20201231_def.xml	Edgar Link	unprocessable
cofs-20201231_lab.xml	Edgar Link	unprocessable
cofs-20201231_pre.xml	Edgar Link	unprocessable
cofs20201002_10k.htm	Edgar Link	pending
cofs20201002_10k_htm.xml	Edgar Link	completed
ex_222071.htm	Edgar Link	pending
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$COFS
CHOICEONE FINANCIAL SERVICES INC Stock $cofs

2020 Q4 Form 10-K Financial Statement

#000143774921007939 Filed on April 01, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$COFS CHOICEONE FINANCIAL SERVICES INC Stock $cofs

2020 Q4 Form 10-K Financial Statement

#000143774921007939 Filed on April 01, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$COFS
CHOICEONE FINANCIAL SERVICES INC Stock $cofs