$CHMG
Chemung Financial Corp Stock $chmg

$chmg Overview Financials Valuation SEC Filings Company Website

2021 Q2 Form 10-Q Financial Statement

#000076356321000074 Filed on August 12, 2021

Income Statement

Concept	2021 Q2	2020 Q2	2020 Q1
Revenue	$16.95M	$16.47M	$16.38M
YoY Change	2.87%	-1.26%	-1.69%
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	$730.0K	$870.0K	$757.0K
YoY Change	-16.09%	-8.42%	-7.23%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$866.0K	$881.0K	$1.322M
YoY Change	-1.7%	-44.28%	-11.75%
% of Operating Profit
Other Income/Expense, Net			$13.75M
YoY Change			1.87%
Pretax Income	$8.870M	$7.184M	$2.993M
YoY Change	23.47%	15.61%	-45.6%
Income Tax	$2.075M	$1.357M	$502.0K
% Of Pretax Income	23.39%	18.89%	16.77%
Net Earnings	$6.795M	$5.827M	$2.491M
YoY Change	16.61%	16.98%	-44.25%
Net Earnings / Revenue	40.1%	35.38%	15.2%
Basic Earnings Per Share	$1.45	$1.20
Diluted Earnings Per Share	$1.45	$1.20	$508.2K
COMMON SHARES
Basic Shares Outstanding	4.680M shares	4.850M shares	4.870M shares
Diluted Shares Outstanding	4.680M shares	4.850M shares

Balance Sheet

Concept	2021 Q2	2020 Q2	2020 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$56.80M	$155.2M	$144.5M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$26.40M	$21.40M	$21.78M
YoY Change	23.39%	-9.36%	-10.29%
Goodwill	$21.82M	$21.82M	$21.82M
YoY Change	0.0%	0.0%	0.0%
Intangibles	$68.00K	$491.0K	$610.0K
YoY Change	-86.15%	-52.65%	-48.65%
Long-Term Investments	$2.900M	$2.200M	$2.000M
YoY Change	31.82%	4.76%	0.0%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$2.381B	$2.051B	$1.841B
YoY Change	16.08%	17.0%	4.06%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$26.00M	$32.10M	$29.60M
YoY Change	-19.0%	62.12%	68.18%
Accrued Expenses	$7.400M	$7.800M	$7.900M
YoY Change	-5.13%	-6.02%	-5.95%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$34.80M	$41.10M	$38.80M
YoY Change	-15.33%	39.8%	42.12%
LONG-TERM LIABILITIES
Long-Term Debt	$3.700M	$4.000M	$4.000M
YoY Change	-7.5%	-4.76%	-6.98%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$3.700M	$4.000M	$4.000M
YoY Change	-7.5%	-4.76%	-6.98%
TOTAL LIABILITIES
Total Short-Term Liabilities	$34.80M	$41.10M	$38.80M
Total Long-Term Liabilities	$3.700M	$4.000M	$4.000M
Total Liabilities	$2.177B	$1.856B	$1.651B
YoY Change	17.26%	17.89%	3.31%
SHAREHOLDERS EQUITY
Retained Earnings	$178.7M	$159.5M	$154.9M
YoY Change	12.02%	6.29%	5.87%
Common Stock	$47.13M	$46.81M	$46.81M
YoY Change	0.69%	1.02%	1.25%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$17.97M	$13.87M	$11.20M
YoY Change	29.58%	14.98%	-8.1%
Treasury Stock Shares	649.1K shares	529.9K shares	432.3K shares
Shareholders Equity	$204.0M	$194.6M	$190.4M
YoY Change
Total Liabilities & Shareholders Equity	$2.381B	$2.051B	$1.841B
YoY Change	16.08%	17.0%	4.06%

Cashflow Statement

Concept	2021 Q2	2020 Q2	2020 Q1
OPERATING ACTIVITIES
Net Income	$6.795M	$5.827M	$2.491M
YoY Change	16.61%	16.98%	-44.25%
Depreciation, Depletion And Amortization	$730.0K	$870.0K	$757.0K
YoY Change	-16.09%	-8.42%	-7.23%
Cash From Operating Activities	$9.200M	$8.040M	$6.294M
YoY Change	14.43%	31.16%	-13.11%
INVESTING ACTIVITIES
Capital Expenditures	-$170.0K	-$370.0K	$121.0K
YoY Change	-54.05%	146.67%	-2.42%
Acquisitions
YoY Change
Other Investing Activities	-$35.62M	-$195.8M	-$18.69M
YoY Change	-81.81%	-1845.28%	152.57%
Cash From Investing Activities	-$35.79M	-$196.2M	-$18.81M
YoY Change	-81.76%	-1870.67%	150.05%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$0.00
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-73.61M	198.9M	$35.07M
YoY Change	-137.02%	-849.0%	-1002.6%
NET CHANGE
Cash From Operating Activities	9.200M	8.040M	$6.294M
Cash From Investing Activities	-35.79M	-196.2M	-$18.81M
Cash From Financing Activities	-73.61M	198.9M	$35.07M
Net Change In Cash	-100.2M	10.71M	$22.55M
YoY Change	-1035.57%	-214.67%	-641.9%
FREE CASH FLOW
Cash From Operating Activities	$9.200M	$8.040M	$6.294M
Capital Expenditures	-$170.0K	-$370.0K	$121.0K
Free Cash Flow	$9.370M	$8.410M	$6.173M
YoY Change	11.41%	33.92%	-13.3%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity File Number EntityFileNumber	001-35741
	dei	Entity Registrant Name EntityRegistrantName	CHEMUNG FINANCIAL CORP
	dei	Entity Address Address Line1 EntityAddressAddressLine1	One Chemung Canal Plaza
	dei	Entity Address City Or Town EntityAddressCityOrTown	Elmira
	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
	dei	Local Phone Number LocalPhoneNumber	737-3711
	dei	City Area Code CityAreaCode	607
	dei	Entity Central Index Key EntityCentralIndexKey	0000763563
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Amendment Flag AmendmentFlag	false
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CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	554611000	USD
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-35741
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2021-06-30
	dei	Entity Registrant Name EntityRegistrantName	CHEMUNG FINANCIAL CORP
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NY
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	16-1237038
	dei	Entity Address Address Line1 EntityAddressAddressLine1	One Chemung Canal Plaza
	dei	Entity Address City Or Town EntityAddressCityOrTown	Elmira
	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	14901
	dei	City Area Code CityAreaCode	607
	dei	Local Phone Number LocalPhoneNumber	737-3711
	dei	Security12b Title Security12bTitle	Common stock, par value $.01 per share
	dei	Trading Symbol TradingSymbol	CHMG
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	true
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
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CY2020Q2	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-243000	USD
	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-782000	USD
	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-508000	USD
CY2021Q2	us-gaap	Occupancy Net OccupancyNet	1491000	USD
CY2020Q2	us-gaap	Occupancy Net OccupancyNet	1430000	USD
	us-gaap	Occupancy Net OccupancyNet	3014000	USD
	us-gaap	Occupancy Net OccupancyNet	2952000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	3853000	USD
CY2021Q2	us-gaap	Professional Fees ProfessionalFees	535000	USD
CY2021Q2	us-gaap	Equipment Expense EquipmentExpense	410000	USD
CY2020Q2	us-gaap	Equipment Expense EquipmentExpense	560000	USD
	us-gaap	Equipment Expense EquipmentExpense	776000	USD
	us-gaap	Equipment Expense EquipmentExpense	1035000	USD
CY2021Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2048000	USD
CY2020Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1939000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	4051000	USD
CY2020Q2	us-gaap	Professional Fees ProfessionalFees	531000	USD
	us-gaap	Professional Fees ProfessionalFees	989000	USD
	us-gaap	Professional Fees ProfessionalFees	860000	USD
CY2021Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	89000	USD
CY2020Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	119000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	190000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	251000	USD
CY2021Q2	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	284000	USD
CY2020Q2	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	82000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	410000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	406000	USD
CY2021Q2	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	5000	USD
CY2020Q2	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	5000	USD
	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	17000	USD
	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	34000	USD
CY2021Q2	chmg	Federal Deposit Insurance Corporation Premium Expense Benefit FederalDepositInsuranceCorporationPremiumExpenseBenefit	329000	USD
CY2020Q2	chmg	Federal Deposit Insurance Corporation Premium Expense Benefit FederalDepositInsuranceCorporationPremiumExpenseBenefit	229000	USD
	chmg	Federal Deposit Insurance Corporation Premium Expense Benefit FederalDepositInsuranceCorporationPremiumExpenseBenefit	719000	USD
	chmg	Federal Deposit Insurance Corporation Premium Expense Benefit FederalDepositInsuranceCorporationPremiumExpenseBenefit	479000	USD
CY2021Q2	us-gaap	Loan Portfolio Expense LoanPortfolioExpense	290000	USD
CY2020Q2	us-gaap	Loan Portfolio Expense LoanPortfolioExpense	187000	USD
	us-gaap	Loan Portfolio Expense LoanPortfolioExpense	524000	USD
	us-gaap	Loan Portfolio Expense LoanPortfolioExpense	497000	USD
CY2021Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1244000	USD
CY2020Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1232000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	2558000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	2677000	USD
CY2021Q2	us-gaap	Noninterest Expense NoninterestExpense	13851000	USD
CY2020Q2	us-gaap	Noninterest Expense NoninterestExpense	13227000	USD
	us-gaap	Noninterest Expense NoninterestExpense	27204000	USD
	us-gaap	Noninterest Expense NoninterestExpense	26976000	USD
CY2021Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	8870000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	7184000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	17183000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	10177000	USD
CY2021Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2075000	USD
CY2020Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1357000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3858000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1859000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	6795000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	5827000	USD
	us-gaap	Net Income Loss NetIncomeLoss	13325000	USD
	us-gaap	Net Income Loss NetIncomeLoss	8318000	USD
CY2021Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4683000	shares
CY2021Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4683000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4850000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4850000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4688000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4688000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4868000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4868000	shares
CY2021Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.45
CY2021Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.45
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.20
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.20
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.84
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.84
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.71
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.71
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	6795000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	5827000	USD
	us-gaap	Net Income Loss NetIncomeLoss	13325000	USD
	us-gaap	Net Income Loss NetIncomeLoss	8318000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	5265000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	2965000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-8367000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	10611000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	1372000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	756000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-2107000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	2706000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	3893000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	2209000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-6260000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	7905000	USD
CY2021Q2	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	-55000	USD
CY2020Q2	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	-55000	USD
	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	-110000	USD
	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	-110000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-57000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-77000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-112000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-154000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-2000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-22000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-2000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-44000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-1000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-7000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-1000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-8000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-1000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-15000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-1000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-36000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3894000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2224000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-6259000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	7941000	USD
CY2021Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	10689000	USD
CY2020Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	8051000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	7066000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	16259000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	190447000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	5827000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2224000	USD
CY2020Q2	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	181000	USD
CY2020Q2	chmg	Restricted Stock Units For Directors Deferred Compensation Plan RestrictedStockUnitsForDirectorsDeferredCompensationPlan	9000	USD
CY2020Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.26
CY2020Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1248000	USD
CY2020Q2	chmg	Distribution Of Shares Of Treasury Stock For Deferred Directors Compensation In Shares DistributionOfSharesOfTreasuryStockForDeferredDirectorsCompensationInShares	6426	shares
CY2020Q2	chmg	Distribution Of Shares Of Treasury Stock For Deferred Directors Compensation Value DistributionOfSharesOfTreasuryStockForDeferredDirectorsCompensationValue	-12000	USD
CY2020Q2	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	117880	shares
CY2020Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	3193000	USD
CY2020Q2	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	13778	shares
CY2020Q2	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	354000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	194589000	USD
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	194784000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	6795000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3894000	USD
CY2021Q2	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	87000	USD
CY2021Q2	chmg	Restricted Stock Units For Directors Deferred Compensation Plan RestrictedStockUnitsForDirectorsDeferredCompensationPlan	4000	USD
CY2021Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.31
CY2021Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1447000	USD
CY2021Q2	chmg	Distribution Of Shares Of Treasury Stock For Deferred Directors Compensation In Shares DistributionOfSharesOfTreasuryStockForDeferredDirectorsCompensationInShares	2707	shares
CY2021Q2	chmg	Distribution Of Shares Of Treasury Stock For Deferred Directors Compensation Value DistributionOfSharesOfTreasuryStockForDeferredDirectorsCompensationValue	3000	USD
CY2021Q2	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	5831	shares
CY2021Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	245000	USD
CY2021Q2	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	2333	shares
CY2021Q2	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	102000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	203977000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	182627000	USD
	us-gaap	Net Income Loss NetIncomeLoss	8318000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	7941000	USD
	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	306000	USD
	chmg	Restricted Stock Units For Directors Deferred Compensation Plan RestrictedStockUnitsForDirectorsDeferredCompensationPlan	20000	USD
	chmg	Distribution Of Shares Of Treasury Stock For Employee Restricted Stock Awards Shares DistributionOfSharesOfTreasuryStockForEmployeeRestrictedStockAwardsShares	255	shares
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.52
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2514000	USD
	chmg	Distribution Of Shares Of Treasury Stock For Directors Compensation Shares DistributionOfSharesOfTreasuryStockForDirectorsCompensationShares	7923	shares
	chmg	Distribution Of Shares Of Treasury Stock For Directors Compensation Value DistributionOfSharesOfTreasuryStockForDirectorsCompensationValue	350000	USD
	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	2274	shares
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	100000	USD
	chmg	Distribution Of Shares Of Treasury Stock For Deferred Directors Compensation In Shares DistributionOfSharesOfTreasuryStockForDeferredDirectorsCompensationInShares	6426	shares
	chmg	Distribution Of Shares Of Treasury Stock For Deferred Directors Compensation Value DistributionOfSharesOfTreasuryStockForDeferredDirectorsCompensationValue	-12000	USD
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	122021	shares
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	3321000	USD
	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	27963	shares
	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	774000	USD
	us-gaap	Stock Issued During Period Shares Restricted Stock Award Forfeited StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited	112	shares
	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	194589000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	199699000	USD
	us-gaap	Net Income Loss NetIncomeLoss	13325000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-6259000	USD
	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	223000	USD
	chmg	Restricted Stock Units For Directors Deferred Compensation Plan RestrictedStockUnitsForDirectorsDeferredCompensationPlan	9000	USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.57
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2658000	USD
	chmg	Distribution Of Shares Of Treasury Stock For Directors Compensation Shares DistributionOfSharesOfTreasuryStockForDirectorsCompensationShares	9291	shares
	chmg	Distribution Of Shares Of Treasury Stock For Directors Compensation Value DistributionOfSharesOfTreasuryStockForDirectorsCompensationValue	317000	USD
	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	3860	shares
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	132000	USD
	chmg	Distribution Of Shares Of Treasury Stock For Deferred Directors Compensation In Shares DistributionOfSharesOfTreasuryStockForDeferredDirectorsCompensationInShares	2707	shares
	chmg	Distribution Of Shares Of Treasury Stock For Deferred Directors Compensation Value DistributionOfSharesOfTreasuryStockForDeferredDirectorsCompensationValue	3000	USD
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	28706	shares
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	1046000	USD
	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	6024	shares
	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	232000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	203977000	USD
	us-gaap	Net Income Loss NetIncomeLoss	13325000	USD
	us-gaap	Net Income Loss NetIncomeLoss	8318000	USD
	chmg	Operating Lease Right Of Use Asset Amortization OperatingLeaseRightOfUseAssetAmortization	369000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-409000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	3310000	USD
	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	20000	USD
	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	0	USD
	chmg	Operating Lease Right Of Use Asset Amortization OperatingLeaseRightOfUseAssetAmortization	351000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	190000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	251000	USD
	us-gaap	Depreciation Depreciation	1307000	USD
	us-gaap	Depreciation Depreciation	1509000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2672000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-530000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	642000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	363000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	20120000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	3377000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	19308000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	3320000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-18000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-77000	USD
	chmg	Other Real Estate Owned Writedown OtherRealEstateOwnedWritedown	0	USD
	chmg	Other Real Estate Owned Writedown OtherRealEstateOwnedWritedown	8000	USD
	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	188000	USD
	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-90000	USD
	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	41000	USD
	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	0	USD
	us-gaap	Increase Decrease In Debt Securities Trading IncreaseDecreaseInDebtSecuritiesTrading	167000	USD
	us-gaap	Increase Decrease In Debt Securities Trading IncreaseDecreaseInDebtSecuritiesTrading	85000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1375000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	9831000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	7000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-45000	USD
	chmg	Restricted Stock Expense Directors Deferred Compensation Plan RestrictedStockExpenseDirectorsDeferredCompensationPlan	9000	USD
	chmg	Restricted Stock Expense Directors Deferred Compensation Plan RestrictedStockExpenseDirectorsDeferredCompensationPlan	20000	USD
	chmg	Expense Related To Employee Stock Compensation ExpenseRelatedToEmployeeStockCompensation	132000	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	1042000	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	998000	USD
	chmg	Expense Related To Employee Stock Compensation ExpenseRelatedToEmployeeStockCompensation	100000	USD
	chmg	Expense Related To Employee Stock Awards ExpenseRelatedToEmployeeStockAwards	223000	USD
	chmg	Expense Related To Employee Stock Awards ExpenseRelatedToEmployeeStockAwards	306000	USD
	chmg	Increases In Payments On Operating Leases IncreasesInPaymentsOnOperatingLeases	145000	USD
	chmg	Increases In Payments On Operating Leases IncreasesInPaymentsOnOperatingLeases	-332000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-1761000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	10190000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	27000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	133000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	17411000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	14328000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	72057000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	21215000	USD
	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	520000	USD
	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	516000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	216069000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	44105000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	286000	USD
	us-gaap	Payments To Acquire Federal Reserve Stock PaymentsToAcquireFederalReserveStock	412000	USD
	us-gaap	Payments To Acquire Federal Reserve Stock PaymentsToAcquireFederalReserveStock	51000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	262000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	487000	USD
	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	128000	USD
	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	230000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	213000	USD
	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	21407000	USD
	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	191528000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-166201000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-214995000	USD
	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	144861000	USD
	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	229584000	USD
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-44448000	USD
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	9534000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	125000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	116000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1046000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3321000	USD
	us-gaap	Proceeds From Sale Of Treasury Stock ProceedsFromSaleOfTreasuryStock	232000	USD
	us-gaap	Proceeds From Sale Of Treasury Stock ProceedsFromSaleOfTreasuryStock	774000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	2425000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	2530000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	97049000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	233925000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-51741000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	33258000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	108538000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	121904000	USD
CY2021Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	56797000	USD
CY2020Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	155162000	USD
	us-gaap	Interest Paid Net InterestPaidNet	1813000	USD
	us-gaap	Interest Paid Net InterestPaidNet	2248000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	2900000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	1285000	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	32000	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	91000	USD
CY2021Q2	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	1447000	USD
CY2020Q2	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	1247000	USD
	chmg	Treasury Stock Repurchasedas Payroll Tax Payment TreasuryStockRepurchasedasPayrollTaxPayment	80000	USD
	chmg	Treasury Stock Repurchasedas Payroll Tax Payment TreasuryStockRepurchasedasPayrollTaxPayment	54000	USD
	chmg	Operating Lease Obligations Incurred OperatingLeaseObligationsIncurred	498000	USD
	chmg	Operating Lease Obligations Incurred OperatingLeaseObligationsIncurred	0	USD
	chmg	Distribution Of Shares Of Treasury Stock For Directors Compensation Value DistributionOfSharesOfTreasuryStockForDirectorsCompensationValue	317000	USD
	chmg	Distribution Of Shares Of Treasury Stock For Directors Compensation Value DistributionOfSharesOfTreasuryStockForDirectorsCompensationValue	350000	USD
	chmg	Distribution Of Shares Of Treasury Stock For Directors Deferred Compensation Value DistributionOfSharesOfTreasuryStockForDirectorsDeferredCompensationValue	3000	USD
	chmg	Distribution Of Shares Of Treasury Stock For Directors Deferred Compensation Value DistributionOfSharesOfTreasuryStockForDirectorsDeferredCompensationValue	-12000	USD
	chmg	Treasury Stock Issued During Period Value Restricted Stock Award Forfeitures TreasuryStockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	USD
	chmg	Treasury Stock Issued During Period Value Restricted Stock Award Forfeitures TreasuryStockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	5000	USD
	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-style:italic;font-weight:400;line-height:120%">Reclassifications</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Amounts in the prior year financial statements are reclassified whenever necessary to conform to the current year's presentation.</span></div>
CY2021Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4683000	shares
CY2021Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4683000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4850000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4850000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4688000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4688000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4868000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4868000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2021Q2	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2020Q2	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2021Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	683712000	USD
CY2021Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	9490000	USD
CY2021Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	5608000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	687594000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	542362000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	12654000	USD
CY2021Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	19000	USD
CY2021Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	405000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	554611000	USD
CY2021Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2981000	USD
CY2021Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	3000000	USD
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2469000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	32000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	2501000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	687000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	691000	USD
CY2021Q2	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	1093000	USD
CY2021Q2	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	1108000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	55036000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	56703000	USD
CY2021Q2	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	1088000	USD
CY2021Q2	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	1092000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	14719000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	15388000	USD
CY2021Q2	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	800000	USD
CY2021Q2	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	800000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	470000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	503000	USD
CY2021Q2	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	0	USD
CY2021Q2	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	0	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	70912000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	73285000	USD
CY2021Q2	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Amortized Cost Basis HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	2981000	USD
CY2021Q2	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	3000000	USD
CY2021Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	683712000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	687594000	USD
CY2021Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2981000	USD
CY2021Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	3000000	USD
CY2020Q2	us-gaap	Debt Securities Available For Sale Gain Loss DebtSecuritiesAvailableForSaleGainLoss	0	USD
	us-gaap	Debt Securities Available For Sale Gain Loss DebtSecuritiesAvailableForSaleGainLoss	0	USD
	us-gaap	Debt Securities Available For Sale Gain Loss DebtSecuritiesAvailableForSaleGainLoss	0	USD
CY2021Q2	us-gaap	Debt Securities Available For Sale Gain Loss DebtSecuritiesAvailableForSaleGainLoss	0	USD
CY2021Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	396199000	USD
CY2021Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	5534000	USD
CY2021Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	6500000	USD
CY2021Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	74000	USD
CY2021Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	402699000	USD
CY2021Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	5608000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	88270000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	368000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	4606000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	37000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	92876000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	405000	USD
CY2021Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	1557999000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	1536463000	USD
CY2021Q2	us-gaap	Interest Receivable InterestReceivable	4823000	USD
CY2020Q4	us-gaap	Interest Receivable InterestReceivable	5035000	USD
CY2021Q2	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1562822000	USD
CY2020Q4	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1541498000	USD
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20909000	USD
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	227000	USD
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	144000	USD
CY2021Q2	chmg	Financing Receivable Allowance For Credit Losses Net Charge Off FinancingReceivableAllowanceForCreditLossesNetChargeOff	-83000	USD
CY2021Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-150000	USD
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20676000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	26233000	USD
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2489000	USD
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	126000	USD
CY2020Q2	chmg	Financing Receivable Allowance For Credit Losses Net Charge Off FinancingReceivableAllowanceForCreditLossesNetChargeOff	-2363000	USD
CY2020Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	260000	USD
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	24130000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20924000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	416000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	577000	USD
	chmg	Financing Receivable Allowance For Credit Losses Net Charge Off FinancingReceivableAllowanceForCreditLossesNetChargeOff	161000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-409000	USD
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20676000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	23478000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2921000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	263000	USD
	chmg	Financing Receivable Allowance For Credit Losses Net Charge Off FinancingReceivableAllowanceForCreditLossesNetChargeOff	-2658000	USD
CY2021Q2	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1562822000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	3310000	USD
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	24130000	USD
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	3244000	USD
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	17432000	USD
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20676000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1527000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	19397000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20924000	USD
CY2021Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	13128000	USD
CY2021Q2	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1549694000	USD
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	10589000	USD
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1530909000	USD
CY2020Q4	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1541498000	USD
CY2021Q2	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	19782000	USD
CY2021Q2	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	13128000	USD
CY2021Q2	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	3244000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	16546000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	10589000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1527000	USD
CY2021Q2	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	11525000	USD
CY2021Q2	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	35000	USD
CY2020Q2	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	15420000	USD
CY2020Q2	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	19000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	11213000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	67000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	15501000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	27000	USD
CY2021Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	8583000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	9952000	USD
CY2021Q2	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	3000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	2000	USD
CY2021Q2	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1562822000	USD
CY2020Q4	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1541498000	USD
CY2020Q2	chmg	Financing Receivable Loan Forebearances Loan Balance FinancingReceivableLoanForebearancesLoanBalance	242500000	USD
CY2021Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	11600000	USD
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	6700000	USD
CY2021Q2	chmg	Financing Receivable Troubled Debt Restructuring Purchasedwith Credit Deterioration Increase FinancingReceivableTroubledDebtRestructuringPurchasedwithCreditDeteriorationIncrease	2100000	USD
CY2020Q4	chmg	Financing Receivable Troubled Debt Restructuring Purchasedwith Credit Deterioration Increase FinancingReceivableTroubledDebtRestructuringPurchasedwithCreditDeteriorationIncrease	400000	USD
CY2021Q2	chmg	Financing Receivable Modifications Recorded Investment Still Accruing FinancingReceivableModificationsRecordedInvestmentStillAccruing	6300000	USD
CY2020Q4	chmg	Financing Receivable Modifications Recorded Investment Still Accruing FinancingReceivableModificationsRecordedInvestmentStillAccruing	2800000	USD
CY2020Q4	chmg	Additional Amounts Committed To Customers With Loans Classified As Troubled Debt Restructurings AdditionalAmountsCommittedToCustomersWithLoansClassifiedAsTroubledDebtRestructurings	0	USD
CY2021Q2	chmg	Additional Amounts Committed To Customers With Loans Classified As Troubled Debt Restructurings AdditionalAmountsCommittedToCustomersWithLoansClassifiedAsTroubledDebtRestructurings	0	USD
CY2021Q2	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	2	loan
CY2021Q2	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	3606000	USD
CY2021Q2	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	3606000	USD
CY2020Q2	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	12	borrower
CY2020Q2	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	3641000	USD
CY2020Q2	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	3641000	USD
CY2021Q2	us-gaap	Allowance For Loan And Lease Losses Period Increase Decrease AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease	1700000	USD
	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	0	USD
CY2020Q2	us-gaap	Allowance For Loan And Lease Losses Period Increase Decrease AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease	200000	USD
CY2020Q2	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	0	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	4	loan
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	6094000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	6094000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	12	borrower
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	3641000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	3641000	USD
	us-gaap	Allowance For Loan And Lease Losses Period Increase Decrease AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease	1700000	USD
	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	0	USD
	us-gaap	Allowance For Loan And Lease Losses Period Increase Decrease AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease	200000	USD
	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	0	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	contract
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	contract
CY2020Q2	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	contract
CY2021Q2	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	contract
CY2021Q2	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1562822000	USD
CY2020Q4	chmg	Financing Receivable After Interest Receivable On Loans Before Allowance On Credit Loss FinancingReceivableAfterInterestReceivableOnLoansBeforeAllowanceOnCreditLoss	1541498000	USD
CY2021Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y7M6D
CY2021Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0332
CY2021Q2	us-gaap	Operating Lease Expense OperatingLeaseExpense	200000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	500000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	923000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	841000	USD
CY2021Q2	chmg	Operating Lease Right Of Use Asset Gross OperatingLeaseRightOfUseAssetGross	7145000	USD
CY2020Q4	chmg	Operating Lease Right Of Use Asset Gross OperatingLeaseRightOfUseAssetGross	8001000	USD
CY2021Q2	chmg	Operating Lease Right Of Use Asset Accumulated Amortization OperatingLeaseRightOfUseAssetAccumulatedAmortization	370000	USD
CY2020Q4	chmg	Operating Lease Right Of Use Asset Accumulated Amortization OperatingLeaseRightOfUseAssetAccumulatedAmortization	705000	USD
CY2021Q2	chmg	Operating Lease Modification In Lease Arrangement OperatingLeaseModificationInLeaseArrangement	499000	USD
CY2020Q4	chmg	Operating Lease Modification In Lease Arrangement OperatingLeaseModificationInLeaseArrangement	-151000	USD
CY2021Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	7274000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	7145000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	482000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	970000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	989000	USD
CY2021Q2	chmg	Lessee Operating Lease Liability To Be Paid Year Five And After LesseeOperatingLeaseLiabilityToBePaidYearFiveAndAfter	4502000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	8707000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1298000	USD
CY2021Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	7409000	USD
CY2021Q2	chmg	Number Of Operating Lease Agreements NumberOfOperatingLeaseAgreements	1	lease
CY2021Q2	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P11Y7M6D
CY2021Q2	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0337
CY2021Q2	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	5572000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	5572000	USD
CY2021Q2	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	2042000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	1875000	USD
CY2021Q2	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	3530000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	3697000	USD
CY2021Q2	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	195000	USD
CY2021Q2	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	391000	USD
CY2021Q2	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	391000	USD
CY2021Q2	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	391000	USD
CY2021Q2	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	409000	USD
CY2021Q2	chmg	Finance Lease Liability To Be Paid Year Five And After FinanceLeaseLiabilityToBePaidYearFiveAndAfter	2840000	USD
CY2021Q2	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	4617000	USD
CY2021Q2	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	893000	USD
CY2021Q2	us-gaap	Finance Lease Liability FinanceLeaseLiability	3724000	USD
CY2021Q2	chmg	Number Of Leases Not Yet Commenced NumberOfLeasesNotYetCommenced	0	lease
CY2020Q4	us-gaap	Goodwill Goodwill	21824000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	21824000	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2021Q2	us-gaap	Goodwill Goodwill	21824000	USD
CY2020Q2	us-gaap	Goodwill Goodwill	21824000	USD
	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	11608000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	11540000	USD
CY2020	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	11608000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	11350000	USD
CY2020Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	100000	USD
CY2021Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	100000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	200000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	300000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	68000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	68000	USD
CY2020Q1	chmg	Participating Credit Facility Receivable Ownership Interest Amount ParticipatingCreditFacilityReceivableOwnershipInterestAmount	4200000	USD
CY2020Q1	chmg	Participating Credit Facility Receivable Amount ParticipatingCreditFacilityReceivableAmount	36000000.0	USD
CY2021Q2	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	3893000	USD
CY2021Q2	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-1000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3894000	USD
CY2020Q2	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	2209000	USD
CY2020Q2	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-15000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2224000	USD
	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-6260000	USD
	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-1000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-6259000	USD
	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	7905000	USD
	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-36000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	7941000	USD
CY2021Q2	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	102000	USD
CY2021Q2	us-gaap	Noninterest Income NoninterestIncome	6492000	USD
CY2020Q2	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	156000	USD
CY2020Q2	us-gaap	Noninterest Income NoninterestIncome	5080000	USD
	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	188000	USD
	us-gaap	Noninterest Income NoninterestIncome	12113000	USD
	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-90000	USD
	us-gaap	Noninterest Income NoninterestIncome	9810000	USD
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2021Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	16945000	USD
CY2021Q2	us-gaap	Interest Expense InterestExpense	866000	USD
CY2021Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	16079000	USD
CY2021Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-150000	USD
CY2021Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	16229000	USD
CY2021Q2	us-gaap	Noninterest Income NoninterestIncome	6492000	USD
CY2021Q2	us-gaap	Noninterest Expense NoninterestExpense	13851000	USD
CY2021Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	8870000	USD
CY2021Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2075000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	6795000	USD
CY2020Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	16472000	USD
CY2020Q2	us-gaap	Interest Expense InterestExpense	881000	USD
CY2020Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	15591000	USD
CY2020Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	260000	USD
CY2020Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	15331000	USD
CY2020Q2	us-gaap	Noninterest Income NoninterestIncome	5080000	USD
CY2020Q2	us-gaap	Noninterest Expense NoninterestExpense	13227000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	7184000	USD
CY2020Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1357000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	5827000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	33685000	USD
	us-gaap	Interest Expense InterestExpense	1820000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	31865000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-409000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	32274000	USD
	us-gaap	Noninterest Income NoninterestIncome	12113000	USD
	us-gaap	Noninterest Expense NoninterestExpense	27204000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	17183000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3858000	USD
	us-gaap	Net Income Loss NetIncomeLoss	13325000	USD
CY2021Q2	us-gaap	Assets Assets	2380712000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	32856000	USD
	us-gaap	Interest Expense InterestExpense	2203000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	30653000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	3310000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	27343000	USD
	us-gaap	Noninterest Income NoninterestIncome	9810000	USD
	us-gaap	Noninterest Expense NoninterestExpense	26976000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	10177000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1859000	USD
	us-gaap	Net Income Loss NetIncomeLoss	8318000	USD
CY2020Q2	us-gaap	Assets Assets	2050921000	USD

Files In Submission

Name	View Source	Status
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0000763563-21-000074.txt	Edgar Link	pending
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$CHMG
Chemung Financial Corp Stock $chmg

2021 Q2 Form 10-Q Financial Statement

#000076356321000074 Filed on August 12, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CHMG Chemung Financial Corp Stock $chmg

2021 Q2 Form 10-Q Financial Statement

#000076356321000074 Filed on August 12, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CHMG
Chemung Financial Corp Stock $chmg