$CHMG
CHEMUNG FINANCIAL CORP Stock $chmg

$chmg Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000076356323000037 Filed on March 22, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$26.23M		$81.48M
YoY Change	50.25%		18.07%
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	$533.0K	$535.0K	$2.200M
YoY Change	-7.94%	-12.3%	-12.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$6.283M		$7.296M
YoY Change	704.48%		113.4%
% of Operating Profit
Other Income/Expense, Net			$59.28M
YoY Change			6.46%
Pretax Income	$9.258M	$9.516M	$36.89M
YoY Change	5.0%	15.63%	9.27%
Income Tax	$1.987M	$2.077M	$8.106M
% Of Pretax Income	21.46%	21.83%	21.97%
Net Earnings	$7.271M	$7.439M	$28.78M
YoY Change	5.88%	15.33%	8.92%
Net Earnings / Revenue	27.72%		35.33%
Basic Earnings Per Share	$1.54		$6.13
Diluted Earnings Per Share	$1.54	$1.583M	$6.133M
COMMON SHARES
Basic Shares Outstanding	4.709M shares	4.678M shares	4.693M shares
Diluted Shares Outstanding	4.721M shares		4.693M shares

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$34.64M	$55.87M
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	$22.12M	$22.56M	$22.56M
YoY Change	-8.96%	25.56%	-10.47%
Goodwill	$21.82M	$21.82M
YoY Change	0.0%	0.0%
Intangibles		$0.00
YoY Change		-100.0%
Long-Term Investments	$2.949M	$2.830M	$2.830M
YoY Change	0.0%	-5.67%	-8.71%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$2.654B	$2.646B	$2.646B
YoY Change	7.24%	9.39%	9.39%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$44.66M	$46.18M	$46.18M
YoY Change	61.62%	87.73%	87.73%
Accrued Expenses	$6.427M	$6.620M	$6.620M
YoY Change	-10.56%	-10.54%	-10.54%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$51.09M	$52.80M	$52.80M
YoY Change	40.86%	57.61%	57.61%
LONG-TERM LIABILITIES
Long-Term Debt	$93.33M	$99.14M	$99.14M
YoY Change	2546.1%	2653.81%	2653.81%
Other Long-Term Liabilities	$22.78M	$27.20M	$27.20M
YoY Change
Total Long-Term Liabilities	$93.33M	$99.14M	$99.14M
YoY Change	2546.1%	2653.81%	2653.81%
TOTAL LIABILITIES
Total Short-Term Liabilities	$51.09M	$52.80M	$52.80M
Total Long-Term Liabilities	$93.33M	$99.14M	$99.14M
Total Liabilities	$2.477B	$2.479B	$2.479B
YoY Change	8.19%	12.33%	12.33%
SHAREHOLDERS EQUITY
Retained Earnings	$216.6M	$211.9M
YoY Change	11.48%	12.17%
Common Stock	$47.44M	$47.38M
YoY Change	1.08%	0.92%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$177.3M	$166.4M	$166.4M
YoY Change
Total Liabilities & Shareholders Equity	$2.654B	$2.646B	$2.646B
YoY Change	7.24%	9.39%	9.39%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$7.271M	$7.439M	$28.78M
YoY Change	5.88%	15.33%	8.92%
Depreciation, Depletion And Amortization	$533.0K	$535.0K	$2.200M
YoY Change	-7.94%	-12.3%	-12.0%
Cash From Operating Activities	$10.69M	$2.362M	$35.05M
YoY Change	78.58%	-73.4%	-1.17%
INVESTING ACTIVITIES
Capital Expenditures	$287.0K	-$22.00K	$426.0K
YoY Change	1813.33%	-112.94%	16.08%
Acquisitions
YoY Change
Other Investing Activities	-$29.64M	-$77.07M	-$252.2M
YoY Change	-34.09%	102.86%	4.16%
Cash From Investing Activities	-$29.92M	-$77.04M	-$252.6M
YoY Change	-33.47%	103.77%	4.18%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$1.991M	88.13M	$246.5M
YoY Change	-102.57%	-1624.71%	96.44%
NET CHANGE
Cash From Operating Activities	$10.69M	2.362M	$35.05M
Cash From Investing Activities	-$29.92M	-77.04M	-$252.6M
Cash From Financing Activities	-$1.991M	88.13M	$246.5M
Net Change In Cash	-$21.23M	13.45M	$28.89M
YoY Change	-155.13%	-138.74%	-135.42%
FREE CASH FLOW
Cash From Operating Activities	$10.69M	$2.362M	$35.05M
Capital Expenditures	$287.0K	-$22.00K	$426.0K
Free Cash Flow	$10.40M	$2.384M	$34.62M
YoY Change	74.22%	-72.63%	-1.35%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0000763563
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	176967568	usd
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	4708557	shares
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-554000	usd
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	17000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8106000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7335000	usd
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.13
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.13
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.64
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.64
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.13
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.13
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.64
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.64
CY2022	dei	Auditor Name AuditorName	Crowe LLP
CY2022	dei	Auditor Firm AuditorFirmId	173
CY2022	dei	Auditor Location AuditorLocation	Grand Rapids, Michigan
CY2022Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	29309000	usd
CY2021Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	17365000	usd
CY2022Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	26560000	usd
CY2021Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	9616000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	55869000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	26981000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	2830000	usd
CY2021Q4	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	2964000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	632589000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	792026000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	2402000	usd
CY2021Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	3796000	usd
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	3790000	usd
CY2021Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	4218000	usd
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CY2021Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	1518249000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19659000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	21025000	usd
CY2022Q4	us-gaap	Notes Receivable Net NotesReceivableNet	1809789000	usd
CY2021Q4	us-gaap	Notes Receivable Net NotesReceivableNet	1497224000	usd
CY2022Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	0	usd
CY2021Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	396000	usd
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CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	17969000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	6449000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	7234000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	21824000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	21824000	usd
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	0	usd
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	15000	usd
CY2022Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	2871000	usd
CY2021Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	2825000	usd
CY2022Q4	us-gaap	Derivative Assets DerivativeAssets	27141000	usd
CY2021Q4	us-gaap	Derivative Assets DerivativeAssets	9270000	usd
CY2022Q4	us-gaap	Interest Receivable And Other Assets InterestReceivableAndOtherAssets	59457000	usd
CY2021Q4	us-gaap	Interest Receivable And Other Assets InterestReceivableAndOtherAssets	31739000	usd
CY2022Q4	us-gaap	Assets Assets	2645553000	usd
CY2021Q4	us-gaap	Assets Assets	2418475000	usd
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CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	739607000	usd
CY2022Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	1593898000	usd
CY2021Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	1415826000	usd
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CY2021Q4	us-gaap	Deposits Deposits	2155433000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	95810000	usd
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CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	3327000	usd
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CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	7378000	usd
CY2022Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	1455000	usd
CY2021Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	1450000	usd
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CY2022Q4	us-gaap	Accounts Payable And Other Accrued Liabilities AccountsPayableAndOtherAccruedLiabilities	17530000	usd
CY2021Q4	us-gaap	Accounts Payable And Other Accrued Liabilities AccountsPayableAndOtherAccruedLiabilities	15097000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	2479165000	usd
CY2021Q4	us-gaap	Liabilities Liabilities	2207020000	usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	10000000	shares
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	10000000	shares
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CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	5310076	shares
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	53000	usd
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	53000	usd
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CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	211859000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	188877000	usd
CY2022Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	615448	shares
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CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-6530000	usd
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CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2418475000	usd
CY2022	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	68051000	usd
CY2021	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	58861000	usd
CY2022	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	12096000	usd
CY2021	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	8935000	usd
CY2022	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1068000	usd
CY2021	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1061000	usd
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CY2021	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1073000	usd
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CY2021	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	3385000	usd
CY2022	us-gaap	Noninterest Income NoninterestIncome	21436000	usd
CY2021	us-gaap	Noninterest Income NoninterestIncome	23870000	usd
CY2022	chmg	Salaries And Incentive Compensation SalariesAndIncentiveCompensation	25054000	usd
CY2021	chmg	Salaries And Incentive Compensation SalariesAndIncentiveCompensation	24413000	usd
CY2022	chmg	Pension And Other Employee Benefits PensionAndOtherEmployeeBenefits	7668000	usd
CY2021	chmg	Pension And Other Employee Benefits PensionAndOtherEmployeeBenefits	6086000	usd
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CY2021	us-gaap	Equipment Expense EquipmentExpense	1669000	usd
CY2022	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	8919000	usd
CY2021	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	8519000	usd
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CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	243000	usd
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CY2021	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	792000	usd
CY2022	chmg	Foreclosed Real Estate Expense Reversal ForeclosedRealEstateExpenseReversal	-5000	usd
CY2021	chmg	Foreclosed Real Estate Expense Reversal ForeclosedRealEstateExpenseReversal	40000	usd
CY2022	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1356000	usd
CY2021	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1408000	usd
CY2022	us-gaap	Loan Portfolio Expense LoanPortfolioExpense	1001000	usd
CY2021	us-gaap	Loan Portfolio Expense LoanPortfolioExpense	1037000	usd
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CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	5253000	usd
CY2022	us-gaap	Noninterest Expense NoninterestExpense	59280000	usd
CY2021	us-gaap	Noninterest Expense NoninterestExpense	55682000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	36889000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	33760000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8106000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7335000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	28783000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	26425000	usd
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4693000	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4693000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4683000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4683000	shares
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.13
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.13
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.64
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.64
CY2022	us-gaap	Net Income Loss NetIncomeLoss	28783000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	26425000	usd
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-93224000	usd
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-15632000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-93224000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-15632000	usd
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-24423000	usd
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-4010000	usd
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-68801000	usd
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-11622000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	63000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	3655000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-220000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-38000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-212000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-101000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-3647000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-27000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-956000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-74000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-2691000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-68727000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-8931000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-39944000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	17494000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	199699000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	26425000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-8931000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	535000	usd
CY2021	chmg	Distribution Of Shares Of Treasury Stock For Directors Deferred Compensation Shares DistributionOfSharesOfTreasuryStockForDirectorsDeferredCompensationShares	2707	shares
CY2021	chmg	Distribution Of Shares Of Treasury Stock For Directors Deferred Compensation Value DistributionOfSharesOfTreasuryStockForDirectorsDeferredCompensationValue	3000	usd
CY2021	chmg	Distribution Of Treasury Stock For Employee Restricted Stock Awards Shares DistributionOfTreasuryStockForEmployeeRestrictedStockAwardsShares	20763	shares
CY2021	chmg	Distribution Share Of Treasury Stock For Employee Restricted Stock Warrants DistributionShareOfTreasuryStockForEmployeeRestrictedStockWarrants	0	usd
CY2021	chmg	Restricted Stock Units For Directors Deferred Compensation Plan RestrictedStockUnitsForDirectorsDeferredCompensationPlan	19000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.19
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5554000	usd
CY2021	chmg	Distribution Of Shares Of Treasury Stock For Directors Compensation Shares DistributionOfSharesOfTreasuryStockForDirectorsCompensationShares	9291	shares
CY2021	chmg	Distribution Of Shares Of Treasury Stock For Directors Compensation Value DistributionOfSharesOfTreasuryStockForDirectorsCompensationValue	317000	usd
CY2021	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	3860	shares
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	132000	usd
CY2021	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	10322	shares
CY2021	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	426000	usd
CY2021	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	41424	shares
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	1616000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	211455000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	211455000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	28783000	usd
CY2022	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	785000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	15000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1722000	usd
CY2022	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-554000	usd
CY2021	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	17000	usd
CY2022	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-56000	usd
CY2022	us-gaap	Depreciation Depreciation	2226000	usd
CY2022	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-3761000	usd
CY2022	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	107000	usd
CY2022	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	5819000	usd
CY2022	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	5316000	usd
CY2022	chmg	Gains Losses On Sales Of Other Real Estate Net GainsLossesOnSalesOfOtherRealEstateNet	60000	usd
CY2022	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-349000	usd
CY2021	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	246000	usd
CY2022	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	142000	usd
CY2021	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	161000	usd
CY2022	us-gaap	Increase Decrease In Debt Securities Trading IncreaseDecreaseInDebtSecuritiesTrading	357000	usd
CY2021	us-gaap	Increase Decrease In Debt Securities Trading IncreaseDecreaseInDebtSecuritiesTrading	337000	usd
CY2022	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	173000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	27636000	usd
CY2022	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	654000	usd
CY2022	chmg	Restricted Stock Expense Directors Deferred Compensation Plan RestrictedStockExpenseDirectorsDeferredCompensationPlan	290000	usd
CY2022	chmg	Expense Related To Employee Stock Compensation ExpenseRelatedToEmployeeStockCompensation	0	usd
CY2021	chmg	Expense Related To Employee Stock Compensation ExpenseRelatedToEmployeeStockCompensation	132000	usd
CY2021	chmg	Expense Related To Employee Stock Awards ExpenseRelatedToEmployeeStockAwards	535000	usd
CY2021	chmg	Payments On Operating Leases Operating Activities PaymentsOnOperatingLeasesOperatingActivities	1202000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	8322000	usd
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	52000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	35461000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	143193000	usd
CY2021	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	937000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	401594000	usd
CY2021	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	2277000	usd
CY2021	us-gaap	Payments To Acquire Federal Reserve Stock PaymentsToAcquireFederalReserveStock	3467000	usd
CY2021	us-gaap	Proceeds From Sale Of Federal Reserve Stock ProceedsFromSaleOfFederalReserveStock	2399000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	367000	usd
CY2021	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	210000	usd
CY2022	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	usd
CY2021	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	286000	usd
CY2022	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	312359000	usd
CY2021	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-18196000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-252620000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-242484000	usd
CY2022	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	-34233000	usd
CY2021	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	207033000	usd
CY2022	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	206027000	usd
CY2021	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-89374000	usd
CY2022	chmg	Change In Of Fhlbny Overnight Advances ChangeInOfFHLBNYOvernightAdvances	-81240000	usd
CY2021	chmg	Change In Of Fhlbny Overnight Advances ChangeInOfFHLBNYOvernightAdvances	-14570000	usd
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	267000	usd
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	255000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	933000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1616000	usd
CY2022	us-gaap	Proceeds From Sale Of Treasury Stock ProceedsFromSaleOfTreasuryStock	424000	usd
CY2021	us-gaap	Proceeds From Sale Of Treasury Stock ProceedsFromSaleOfTreasuryStock	426000	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	5797000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	5318000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	246461000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	125466000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	28888000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-81557000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	108538000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	55869000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	26981000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	6642000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	3472000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	5625000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	5675000	usd
CY2022	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	348000	usd
CY2021	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	102000	usd
CY2022Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	1455000	usd
CY2021Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	1450000	usd
CY2022	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	56000	usd
CY2021	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	11500000	usd
CY2021	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	146000	usd
CY2022	chmg	Period Of Delinquency After Which A Loan Is Placed On Non Accrual Status PeriodOfDelinquencyAfterWhichALoanIsPlacedOnNonAccrualStatus	P90D
CY2022	chmg	Number Of Consecutive Months For Which Loans Remain Current Before Non Accrual Loans Are Returned To Accrual Status NumberOfConsecutiveMonthsForWhichLoansRemainCurrentBeforeNonAccrualLoansAreReturnedToAccrualStatus	P6M
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Policy For Uncollectible Amounts FinancingReceivableAllowanceForCreditLossesPolicyForUncollectibleAmounts	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">ALLOWANCE FOR LOAN LOSSES</span></div><div><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The allowance is an amount that management believes will be adequate to absorb probable incurred credit losses on existing loans. The allowance is established based on management’s evaluation of the probable incurred credit losses in our portfolio in accordance with GAAP, and is comprised of both specific valuation allowances and general valuation allowances.</span></div><div style="margin-top:8pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">A loan is classified as impaired when, based on current information and events, it is probable that the Bank will be unable to collect both the principal and interest due under the contractual terms of the loan agreement. Specific valuation allowances are established based on management’s analysis of individually impaired loans. Factors considered by management in determining impairment include payment status, evaluations of the underlying collateral, expected cash flows, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. If a loan is determined to be impaired and is placed on non-accrual status, all future payments received are applied to principal and a portion of the allowance is allocated so that the loan is reported, net, at the present value of estimated future cash flows using the loan’s existing rate or at the fair value of collateral if repayment is expected solely from the collateral.</span></div><div style="margin-top:8pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The general component covers non-impaired loans and is based on historical loss experience adjusted for current factors. Loans not impaired but classified as substandard and special mention use a historical loss factor on a rolling five year history of net losses. For all other unclassified loans, the historical loss experience is determined by portfolio class and is based on the actual loss history experienced by the Bank over the most recent two years. This actual loss experience is supplemented with other qualitative factors based on the risks present for each portfolio class. These qualitative factors include consideration of the following: (1) lending policies and procedures, including underwriting standards and collection, charge-off and recovery policies, (2) national and local economic and business conditions and developments, including the condition of various market segments, (3) loan profiles and volume of the portfolio, (4) the experience, ability, and depth of lending management and staff, (5) the volume and severity of past due, classified and watch-list loans, non-accrual loans, troubled debt restructurings, and other modifications (6) the quality of the Bank’s loan review system and the degree of oversight by the Bank’s Board of Directors, (7) collateral related issues: secured vs. unsecured, type, declining valuation environment and trend of other related factors, (8) the existence and effect of any concentrations of credit, and changes in the level of such concentrations, (9) the effect of external factors, such as competition and legal and regulatory requirements, on the level of estimated credit losses in the Bank’s current portfolio and (10) the impact of the global economy.</span></div><div style="margin-top:8pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The allowance for loan losses is increased through a provision for loan losses charged to operations. Loans are charged against the allowance for loan losses when management believes that the collectability of all or a portion of the principal is unlikely. Management's evaluation of the adequacy of the allowance for loan losses is performed on a periodic basis and takes into consideration such factors as the credit risk grade assigned to the loan, historical loan loss experience and review of specific impaired loans. While management uses available information to recognize losses on loans, future additions to the allowance may be necessary based on changes in economic conditions.</span></div>
CY2022	chmg	Rolling Historical Period Of Net Losses Used In Evaluating General Component Of Valuation Allowance For Loans Not Impaired But Classified As Substandard And Special Mention RollingHistoricalPeriodOfNetLossesUsedInEvaluatingGeneralComponentOfValuationAllowanceForLoansNotImpairedButClassifiedAsSubstandardAndSpecialMention	P5Y
CY2022	chmg	Number Of Most Recent Years Of Actual Loss History Used In Determining Historical Loss Experience For All Other Unclassified Loans NumberOfMostRecentYearsOfActualLossHistoryUsedInDeterminingHistoricalLossExperienceForAllOtherUnclassifiedLoans	P2Y
CY2021Q4	us-gaap	Assets Under Management Carrying Amount AssetsUnderManagementCarryingAmount	2325000000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	8178000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	8114000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	1000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	4000	usd
CY2022Q4	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1835996000	usd
CY2022	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2022	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">RECLASSIFICATION</span></div><div><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Amounts in the prior years' consolidated financial statements are reclassified whenever necessary to conform to the current year's presentation. Reclassification adjustments had no impact on prior year net income or shareholders' equity.</span></div>
CY2022	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">RISKS AND UNCERTAINTIES</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Current Banking Environment</span></div><div><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Industry events transpiring prior to the Corporation’s filing date, including the failures of Silicon Valley Bank (SVB) headquartered in Santa Clara, California and Signature Bank headquartered in New York, New York in March 2023, have led to uncertainty and concerns regarding the liquidity positions of the banking sector. SVB was placed into receivership on March 10, 2023, marking the second largest bank failure in U.S. history. Signature Bank was placed into receivership on March 12, 2023, marking the third largest bank failure in U.S. history. Both banks appear to have had high ratios of uninsured deposits to total deposits, when compared to industry average. These failures underscore the importance of maintaining access to diverse sources of funding. </span></div><div style="margin-top:8pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Market conditions and external factors may unpredictably impact the competitive landscape for deposits in the banking industry. Additionally, the rising interest rate environment has increased competition for liquidity and the premium at which liquidity is available to meet funding needs. The Corporation believes the sources of liquidity presented in the Audited Consolidated Financial Statements and the Notes to the Audited Consolidated Financial Statements are sufficient to meet its needs on the balance sheet date. </span></div><div style="margin-top:8pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">An unexpected influx of withdrawals of deposits could adversely impact the Corporation's ability to rely on organic deposits to primarily fund its operations, potentially requiring greater reliance on secondary sources of liquidity to meet withdrawal demands or to fund continuing operations. These sources may include proceeds from Federal Home Loan Bank advances, sales of investment securities and loans, federal funds lines of credit from correspondent banks, and out-of-market time deposits. Important Accounting Policy ramifications of such events are outlined in the previous sections of Note 1, and subsequently in the relevant Notes to the Consolidated Financial Statements. </span></div><div style="margin-top:8pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In response to these events, the Treasury Department, Federal Reserve, and FDIC jointly announced the Bank Term Funding Program (BTFP) on March 12, 2023. This program aims to enhance liquidity by allowing institutions to pledge certain securities at the par value of the securities, and at a borrowing rate of ten basis points over the one-year overnight index swap rate. The BTFP is available to eligible U.S. federally insured depository institutions, with advances having a term of up to one year and no prepayment penalties. As of the date of the release of the Audited Consolidated Financial Statements, the Corporation has not accessed the BTFP. </span></div><div style="margin-top:8pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Such reliance on secondary funding sources could increase the Corporation's overall cost of funding and thereby reduce net income. While the Corporation believes its current sources of liquidity are adequate to fund operations, there is no guarantee they will suffice to meet future liquidity demands. This may necessitate slowing or discontinuing loan growth, capital expenditures, or other investments, or liquidating assets.</span></div>
CY2021Q4	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1522382000	usd
CY2022Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	5400000	usd
CY2021Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	10300000	usd
CY2022Q4	chmg	Financing Receivable Troubled Debt Restructuring Purchasedwith Credit Deterioration Increase FinancingReceivableTroubledDebtRestructuringPurchasedwithCreditDeteriorationIncrease	200000	usd
CY2021Q4	chmg	Financing Receivable Troubled Debt Restructuring Purchasedwith Credit Deterioration Increase FinancingReceivableTroubledDebtRestructuringPurchasedwithCreditDeteriorationIncrease	1900000	usd
CY2022Q4	chmg	Financing Receivable Modifications Recorded Investment Still Accruing FinancingReceivableModificationsRecordedInvestmentStillAccruing	1400000	usd
CY2022Q4	chmg	Financing Receivable Modifications Recorded Investment Nonaccrual Status FinancingReceivableModificationsRecordedInvestmentNonaccrualStatus	4000000	usd
CY2021Q4	chmg	Financing Receivable Modifications Recorded Investment Still Accruing FinancingReceivableModificationsRecordedInvestmentStillAccruing	5600000	usd
CY2021Q4	chmg	Financing Receivable Modifications Recorded Investment Nonaccrual Status FinancingReceivableModificationsRecordedInvestmentNonaccrualStatus	4700000	usd
CY2022Q4	chmg	Additional Amounts Committed To Customers With Loans Classified As Troubled Debt Restructurings AdditionalAmountsCommittedToCustomersWithLoansClassifiedAsTroubledDebtRestructurings	0	usd
CY2020Q1	chmg	Cash Reserve Requirement CashReserveRequirement	0
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	1600000	usd
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	1600000	usd
CY2022Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0	usd
CY2021Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	7600000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	632589000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	795409000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	792026000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	157000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	96766000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	6587000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	9970000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	2576000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	2537000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	106445000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	97982000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	17887000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	15481000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	470000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	436000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	729198000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	632589000	usd
CY2022	us-gaap	Debt Securities Available For Sale Gain Loss DebtSecuritiesAvailableForSaleGainLoss	0	usd
CY2021	us-gaap	Debt Securities Available For Sale Gain Loss DebtSecuritiesAvailableForSaleGainLoss	0	usd
CY2021Q4	chmg	Additional Amounts Committed To Customers With Loans Classified As Troubled Debt Restructurings AdditionalAmountsCommittedToCustomersWithLoansClassifiedAsTroubledDebtRestructurings	0	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	2784000	usd
CY2022Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	3857000	usd
CY2022Q4	us-gaap	Time Deposits TimeDeposits	402384000	usd
CY2022Q4	chmg	Brokered Time Deposit Maturities Year One BrokeredTimeDepositMaturitiesYearOne	73500000	usd
CY2022Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	36400000	usd
CY2021Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	28800000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1365000	usd
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2424000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	2402000	usd
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	3790000	usd
CY2021Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	3796000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	0	usd
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	22000	usd
CY2021	us-gaap	Held To Maturity Securities Sold Security Realized Gain Loss HeldToMaturitySecuritiesSoldSecurityRealizedGainLoss	0	usd
CY2022	us-gaap	Held To Maturity Securities Sold Security Realized Gain Loss HeldToMaturitySecuritiesSoldSecurityRealizedGainLoss	0	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	1496000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	1493000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	928000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	909000	usd
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2424000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	2402000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	137597000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	9999000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	468381000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	86767000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	605978000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	96766000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	398967000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	5550000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	137808000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	4420000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	536775000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	9970000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	5501000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	5732000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	883000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1033000	usd
CY2022Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	1829448000	usd
CY2021Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	1518249000	usd
CY2022Q4	us-gaap	Interest Receivable InterestReceivable	6548000	usd
CY2021Q4	us-gaap	Interest Receivable InterestReceivable	4133000	usd
CY2022Q4	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1835996000	usd
CY2021Q4	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1522382000	usd
CY2022Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	0	usd
CY2021Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	400000	usd
CY2022Q4	chmg	Financing Receivable Allowance For Loan Losses In Payroll Protection Program Loans FinancingReceivableAllowanceForLoanLossesInPayrollProtectionProgramLoans	0	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	21025000	usd
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1494000	usd
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	682000	usd
CY2022	chmg	Financing Receivable Allowance For Credit Losses Net Charge Off FinancingReceivableAllowanceForCreditLossesNetChargeOff	-812000	usd
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-554000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19659000	usd
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20924000	usd
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	739000	usd
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	823000	usd
CY2021	chmg	Financing Receivable Allowance For Credit Losses Net Charge Off FinancingReceivableAllowanceForCreditLossesNetChargeOff	84000	usd
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	17000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	21025000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1147000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	18512000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19659000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	3030000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	17995000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	21025000	usd
CY2022Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	7522000	usd
CY2022Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1828474000	usd
CY2022Q4	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1835996000	usd
CY2021Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	11647000	usd
CY2021Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1510735000	usd
CY2021Q4	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1522382000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	7548000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	7522000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1147000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	18205000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	11647000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	3030000	usd
CY2022	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	8961000	usd
CY2021	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	6596000	usd
CY2021	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	6596000	usd
CY2021	us-gaap	Allowance For Loan And Lease Losses Period Increase Decrease AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease	1700000	usd
CY2021	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	0	usd
CY2022	chmg	Number Of Days Past Due After Which A Loan Is Considered To Be In Payment Default NumberOfDaysPastDueAfterWhichALoanIsConsideredToBeInPaymentDefault	P90D
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	usd
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	usd
CY2022	chmg	Number Of Days Past Due After Which A Loan Will Be Rated NumberOfDaysPastDueAfterWhichALoanWillBeRated	P90D
CY2022Q4	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1835996000	usd
CY2021Q4	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1522382000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	21824000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	87013000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	87942000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	70900000	usd
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	69973000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	16113000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	17969000	usd
CY2022	us-gaap	Depreciation Depreciation	2200000	usd
CY2021	us-gaap	Depreciation Depreciation	2500000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	5572000	usd
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	5572000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	2540000	usd
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	2208000	usd
CY2022Q4	chmg	Finance Lease Right Of Use Asset After Accumulated Amortization FinanceLeaseRightOfUseAssetAfterAccumulatedAmortization	3032000	usd
CY2021Q4	chmg	Finance Lease Right Of Use Asset After Accumulated Amortization FinanceLeaseRightOfUseAssetAfterAccumulatedAmortization	3364000	usd
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y7M6D
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0335
CY2022	us-gaap	Operating Lease Expense OperatingLeaseExpense	1000000	usd
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	1000000	usd
CY2022	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	800000	usd
CY2022Q4	chmg	Operating Lease Right Of Use Asset Gross OperatingLeaseRightOfUseAssetGross	7234000	usd
CY2021Q4	chmg	Operating Lease Right Of Use Asset Gross OperatingLeaseRightOfUseAssetGross	7145000	usd
CY2022Q4	chmg	Operating Lease Right Of Use Asset Accumulated Amortization OperatingLeaseRightOfUseAssetAccumulatedAmortization	785000	usd
CY2021Q4	chmg	Operating Lease Right Of Use Asset Accumulated Amortization OperatingLeaseRightOfUseAssetAccumulatedAmortization	759000	usd
CY2022Q4	chmg	Operating Lease Right Of Use Asset Lease Termination OperatingLeaseRightOfUseAssetLeaseTermination	0	usd
CY2021Q4	chmg	Operating Lease Right Of Use Asset Lease Termination OperatingLeaseRightOfUseAssetLeaseTermination	313000	usd
CY2022Q4	chmg	Operating Lease Right Of Use Asset New Lease Agreement And Modifications OperatingLeaseRightOfUseAssetNewLeaseAgreementAndModifications	0	usd
CY2021Q4	chmg	Operating Lease Right Of Use Asset New Lease Agreement And Modifications OperatingLeaseRightOfUseAssetNewLeaseAgreementAndModifications	1161000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	6449000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	7234000	usd
CY2020Q4	us-gaap	Goodwill Goodwill	21824000	usd
CY2022	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	usd
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	992000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	924000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	841000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	845000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	854000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	3167000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	7623000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1003000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	6620000	usd
CY2022Q4	chmg	Lessee Operating Lease Lease Not Yet Commenced Liability LesseeOperatingLeaseLeaseNotYetCommencedLiability	0	usd
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P10Y2M12D
CY2022Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0339
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	391000	usd
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	391000	usd
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	409000	usd
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	425000	usd
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	428000	usd
CY2022Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	1988000	usd
CY2022Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	4032000	usd
CY2022Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	705000	usd
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	3327000	usd
CY2022Q4	chmg	Lessee F Inance Lease Lease Not Yet Commenced Liability LesseeFInanceLeaseLeaseNotYetCommencedLiability	0	usd
CY2022Q4	us-gaap	Goodwill Goodwill	21824000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	21824000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	6384000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	6765000	usd
CY2022	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	11608000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	11608000	usd
CY2021	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	11608000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	11593000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	15000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	200000	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	733329000	usd
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	739607000	usd
CY2022Q4	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	271645000	usd
CY2021Q4	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	284721000	usd
CY2022Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	640840000	usd
CY2021Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	654553000	usd
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	279029000	usd
CY2021Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	280195000	usd
CY2022Q4	chmg	Time Deposits250000 Or Less TimeDeposits250000OrLess	272182000	usd
CY2021Q4	chmg	Time Deposits250000 Or Less TimeDeposits250000OrLess	141990000	usd
CY2022Q4	chmg	Time Deposits More Than250000 TimeDepositsMoreThan250000	31547000	usd
CY2021Q4	chmg	Time Deposits More Than250000 TimeDepositsMoreThan250000	27974000	usd
CY2022Q4	chmg	One Way Brokered Deposits OneWayBrokeredDeposits	73452000	usd
CY2021Q4	chmg	One Way Brokered Deposits OneWayBrokeredDeposits	0	usd
CY2022Q4	chmg	Other Time Deposits OtherTimeDeposits	25203000	usd
CY2021Q4	chmg	Other Time Deposits OtherTimeDeposits	26393000	usd
CY2022Q4	us-gaap	Deposits Deposits	2327227000	usd
CY2021Q4	us-gaap	Deposits Deposits	2155433000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	303719000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	75324000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	10702000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	5998000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	95800000	usd
CY2021Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	14600000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	95810000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Interest Rate FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate	0.0461
CY2021Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	14570000	usd
CY2021Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Interest Rate FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate	0.0034
CY2022Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Maximum Amount Available FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable	99800000	usd
CY2022	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-349000	usd
CY2022	us-gaap	Noninterest Income NoninterestIncome	21436000	usd
CY2021	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	246000	usd
CY2021	us-gaap	Noninterest Income NoninterestIncome	23870000	usd
CY2022Q4	chmg	Concentration Risk Derivative Instruments Offbalance Sheet Risk ConcentrationRiskDerivativeInstrumentsOffbalanceSheetRisk	0	usd
CY2021Q4	chmg	Concentration Risk Derivative Instruments Offbalance Sheet Risk ConcentrationRiskDerivativeInstrumentsOffbalanceSheetRisk	500000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	527000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	357000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	43000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1722000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	570000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8106000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7335000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	7747000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	7090000	usd
CY2022	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	434000	usd
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	380000	usd
CY2022	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	309000	usd
CY2021	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	291000	usd
CY2022	us-gaap	Income Tax Reconciliation Deductions Dividends IncomeTaxReconciliationDeductionsDividends	7000	usd
CY2021	us-gaap	Income Tax Reconciliation Deductions Dividends IncomeTaxReconciliationDeductionsDividends	8000	usd
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	988000	usd
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	803000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	8000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	4000	usd
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	113000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	117000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8106000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7335000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.220
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.217
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	5147000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	5546000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	1133000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	979000	usd
CY2022Q4	chmg	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Directors Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsDirectorsCompensation	1128000	usd
CY2021Q4	chmg	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Directors Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsDirectorsCompensation	1130000	usd
CY2022Q4	chmg	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	1688000	usd
CY2021Q4	chmg	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	1976000	usd
CY2022Q4	chmg	Deferred Tax Assets Purchase Accounting Adjustment Fixed Assets DeferredTaxAssetsPurchaseAccountingAdjustmentFixedAssets	153000	usd
CY2021Q4	chmg	Deferred Tax Assets Purchase Accounting Adjustment Fixed Assets DeferredTaxAssetsPurchaseAccountingAdjustmentFixedAssets	153000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Trading Securities DeferredTaxAssetsUnrealizedLossesOnTradingSecurities	25310000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Trading Securities DeferredTaxAssetsUnrealizedLossesOnTradingSecurities	886000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	1320000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	1347000	usd
CY2022Q4	chmg	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Nonaccrued Interest DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsNonaccruedInterest	415000	usd
CY2021Q4	chmg	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Nonaccrued Interest DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsNonaccruedInterest	473000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	117000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	139000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	112000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	127000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	36523000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	12756000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Financing Costs DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts	1358000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Financing Costs DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts	355000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	4055000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	3715000	usd
CY2022Q4	chmg	Deferred Tax Liabilities Deferred Expense Discount Accretion DeferredTaxLiabilitiesDeferredExpenseDiscountAccretion	108000	usd
CY2021Q4	chmg	Deferred Tax Liabilities Deferred Expense Discount Accretion DeferredTaxLiabilitiesDeferredExpenseDiscountAccretion	78000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1733000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1556000	usd
CY2022Q4	chmg	Deferred Tax Liabilities Reit Dividend DeferredTaxLiabilitiesREITDividend	561000	usd
CY2021Q4	chmg	Deferred Tax Liabilities Reit Dividend DeferredTaxLiabilitiesREITDividend	608000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	1688000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	1976000	usd
CY2022Q4	chmg	Deferred Tax Liabilities Tax Deferred Expense Compensation And Benefits DeferredTaxLiabilitiesTaxDeferredExpenseCompensationAndBenefits	5000	usd
CY2021Q4	chmg	Deferred Tax Liabilities Tax Deferred Expense Compensation And Benefits DeferredTaxLiabilitiesTaxDeferredExpenseCompensationAndBenefits	3000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	219000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	344000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	9727000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	8635000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	26796000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	4121000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	0	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	0	usd
CY2022	chmg	Defined Benefit Plan Benefit Obligation Actuarial Gain Loss Increase Decrease Due To Change In Mortality Losses DefinedBenefitPlanBenefitObligationActuarialGainLossIncreaseDecreaseDueToChangeInMortalityLosses	200000	usd
CY2021Q4	us-gaap	Notes Receivable Related Parties NotesReceivableRelatedParties	51192000	usd
CY2016Q4	chmg	Defined Contribution Plan Number Of Annual Service Hours For Eligibility DefinedContributionPlanNumberOfAnnualServiceHoursForEligibility	PT1000H
CY2022	chmg	Total Unrecognized Net Loss Increase Decrease Percentage Of Accumulated Benefit Obligation TotalUnrecognizedNetLossIncreaseDecreasePercentageOfAccumulatedBenefitObligation	-0.46
CY2022	us-gaap	Deferred Compensation Arrangement With Individual Shares Issued DeferredCompensationArrangementWithIndividualSharesIssued	33586	shares
CY2021Q1	us-gaap	Deferred Compensation Arrangement With Individual Shares Issued DeferredCompensationArrangementWithIndividualSharesIssued	20763	shares
CY2022	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	1200000	usd
CY2021	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	500000	usd
CY2020Q4	us-gaap	Notes Receivable Related Parties NotesReceivableRelatedParties	56052000	usd
CY2022	chmg	Financing Receivable Related Parties Additions FinancingReceivableRelatedPartiesAdditions	990000	usd
CY2021	chmg	Financing Receivable Related Parties Additions FinancingReceivableRelatedPartiesAdditions	2642000	usd
CY2022	chmg	Financing Receivable Related Parties Effect Of Changes In Composition FinancingReceivableRelatedPartiesEffectOfChangesInComposition	-22607000	usd
CY2021	chmg	Financing Receivable Related Parties Effect Of Changes In Composition FinancingReceivableRelatedPartiesEffectOfChangesInComposition	-122000	usd
CY2022	chmg	Financing Receivable Related Parties Proceeds FinancingReceivableRelatedPartiesProceeds	1513000	usd
CY2021	chmg	Financing Receivable Related Parties Proceeds FinancingReceivableRelatedPartiesProceeds	7380000	usd
CY2022Q4	us-gaap	Notes Receivable Related Parties NotesReceivableRelatedParties	28062000	usd
CY2021Q4	us-gaap	Notes Receivable Related Parties NotesReceivableRelatedParties	51192000	usd
CY2022Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	28400000	usd
CY2021Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	46700000	usd
CY2022Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	17200000	usd
CY2022	chmg	Net Profits Period For Accessing Dividends NetProfitsPeriodForAccessingDividends	P2Y
CY2022Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments Without Regulatory Approval StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval	49300000	usd
CY2022Q4	us-gaap	Capital Capital	239478000	usd
CY2022Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1257
CY2022Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	219820000	usd
CY2022Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1154
CY2022Q4	chmg	Common Equity Tier One Risk Based Capital CommonEquityTierOneRiskBasedCapital	219820000	usd
CY2022Q4	chmg	Common Equity Tier One Risk Based Capital To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets	0.1154
CY2022Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	219820000	usd
CY2022Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0823
CY2021Q4	us-gaap	Capital Capital	215091000	usd
CY2021Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1421
CY2021Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	196147000	usd
CY2021Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1296
CY2021Q4	chmg	Common Equity Tier One Risk Based Capital CommonEquityTierOneRiskBasedCapital	196147000	usd
CY2021Q4	chmg	Common Equity Tier One Risk Based Capital To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets	0.1296
CY2021Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	196147000	usd
CY2021Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0806
CY2022	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-68754000	usd
CY2022	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-27000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-68727000	usd
CY2021	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-8924000	usd
CY2021	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	7000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-8931000	usd
CY2022	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2022	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	81475000	usd
CY2022	us-gaap	Interest Expense InterestExpense	7296000	usd
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	74179000	usd
CY2022	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-554000	usd
CY2022	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	74733000	usd
CY2022	us-gaap	Noninterest Income NoninterestIncome	21436000	usd
CY2022	us-gaap	Other Expenses OtherExpenses	59280000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	36889000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8106000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	28783000	usd
CY2022Q4	us-gaap	Assets Assets	2645553000	usd
CY2021	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	69008000	usd
CY2021	us-gaap	Interest Expense InterestExpense	3419000	usd
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	65589000	usd
CY2021	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	17000	usd
CY2021	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	65572000	usd
CY2021	us-gaap	Noninterest Income NoninterestIncome	23870000	usd
CY2021	us-gaap	Other Expenses OtherExpenses	55682000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	33760000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7335000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	26425000	usd
CY2021Q4	us-gaap	Assets Assets	2418475000	usd

Files In Submission

Name	View Source	Status
0000763563-23-000037-index-headers.html	Edgar Link	pending
0000763563-23-000037-index.html	Edgar Link	pending
0000763563-23-000037.txt	Edgar Link	pending
0000763563-23-000037-xbrl.zip	Edgar Link	pending
chmg-20221231.htm	Edgar Link	pending
chmg-20221231.xsd	Edgar Link	pending
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chmg10k123122exh32_1.htm	Edgar Link	pending
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Financial_Report.xlsx	Edgar Link	pending
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chmg-20221231_def.xml	Edgar Link	unprocessable
chmg-20221231_cal.xml	Edgar Link	unprocessable
chmg-20221231_pre.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
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chmg-20221231_lab.xml	Edgar Link	unprocessable

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$CHMG
CHEMUNG FINANCIAL CORP Stock $chmg

2023 Q1 Form 10-K Financial Statement

#000076356323000037 Filed on March 22, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CHMG CHEMUNG FINANCIAL CORP Stock $chmg

2023 Q1 Form 10-K Financial Statement

#000076356323000037 Filed on March 22, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CHMG
CHEMUNG FINANCIAL CORP Stock $chmg