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LOANS AND ALLOWANCE FOR CREDIT LOSSES (Tables)

3 Months Ended

Mar. 31, 2025

Credit Loss [Abstract]

Schedule of Composition of the Loan Portfolio by Type

The composition of the loan portfolio, net of deferred origination fees and costs, is summarized as follows (in thousands):

						March 31, 2025						December 31, 2024
Commercial and industrial						$	295,732					$	299,521
Commercial mortgages:
Construction						95,671						94,943
Owner occupied commercial real estate						155,027						142,279
Non-owner occupied commercial real estate						1,009,558						979,782
Residential mortgages						275,448						274,979
Consumer loans:
Home equity lines and loans						93,914						93,220
Indirect consumer loans						164,594						178,118
Direct consumer loans						7,692						8,577
Total loans, net of deferred loan fees and costs						2,097,636						2,071,419
Allowance for credit losses						(22,522)						(21,388)
Loans, net						$	2,075,114					$	2,050,031

Schedules of Allowance for Credit Loss

The following tables present the activity in the allowance for credit losses by portfolio segment for the three month periods ended March 31, 2025 and 2024 (in thousands):

			Three Months Ended March 31, 2025
Allowance for credit losses			Commercial and Industrial						Commercial Mortgages						Residential Mortgages						Consumer Loans						Total
Beginning balance, January 1, 2025			$	4,520					$	11,214					$	2,259					$	3,395					$	21,388
Charge-offs			(5)						—						—						(393)						(398)
Recoveries			4						1						5						126						136
Net recoveries (charge-offs)			(1)						1						5						(267)						(262)
Provision (1)			634						874						209						(321)						1,396
Ending balance, March 31, 2025			$	5,153					$	12,089					$	2,473					$	2,807					$	22,522

(1)Additional provision related to off-balance sheet exposure was a credit of $304 thousand for the three months ended March 31, 2025.

			Three Months Ended March 31, 2024
Allowance for credit losses			Commercial and Industrial						Commercial Mortgages						Residential Mortgages						Consumer Loans						Total
Beginning balance, January 1, 2024			$	5,055					$	12,026					$	2,194					$	3,242					$	22,517
Charge-offs			—						—						(16)						(351)						(367)
Recoveries			37						1						22						125						185
Net recoveries (charge-offs)			37						1						6						(226)						(182)
Provision (1)			(576)						(1,660)						(138)						510						(1,864)
Ending balance, March 31, 2024			$	4,516					$	10,367					$	2,062					$	3,526					$	20,471

(1)Additional provision related to off-balance sheet exposure was a credit of $176 thousand for the three months ended March 31, 2024.

The following table presents the activity in the allowance for credit losses on unfunded commitments for the three month periods ended March 31, 2025 and 2024 (in thousands):

			For the Three Months Ended
Allowance for credit losses on unfunded commitments			March 31, 2025						March 31, 2024
Beginning balance			$	842					$	919
Provision for credit losses on unfunded commitments			(304)						(176)
Ending balance			$	538					$	743

The following table presents the provision for credit losses on loans and unfunded commitments for the three month periods ended March 31, 2025 and 2024 (in thousands):

						For the Three Months Ended
			Provision for credit losses			March 31, 2025						March 31, 2024
			Provision for credit losses on loans			$	1,396					$	(1,864)
			Provision for credit losses on unfunded commitments			(304)						(176)
			Total provision for credit losses			$	1,092					$	(2,040)

The following tables present the balance in the allowance for credit losses by portfolio segment, as of March 31, 2025 and December 31, 2024 (in thousands):

			March 31, 2025
Allowance for credit losses			Commercial and Industrial						Commercial Mortgages						Residential Mortgages						Consumer Loans						Total
Ending allowance balance attributable to loans:
Individually analyzed			$	1,514					$	140					$	—					$	—					$	1,654
Collectively analyzed			3,639						11,949						2,473						2,807						20,868
Total ending allowance balance			$	5,153					$	12,089					$	2,473					$	2,807					$	22,522

			December 31, 2024
Allowance for credit losses			Commercial and Industrial						Commercial Mortgages						Residential Mortgages						Consumer Loans						Totals
Ending allowance balance attributable to loans:
Individually analyzed			$	1,446					$	106					$	—					$	—					$	1,552
Collectively analyzed			3,074						11,108						2,259						3,395						19,836
Total ending allowance balance			$	4,520					$	11,214					$	2,259					$	3,395					$	21,388

The following tables present the amortized cost basis of loans by portfolio segment, as of March 31, 2025 and December 31, 2024 (in thousands):

			March 31, 2025
Amortized cost basis of loans:			Commercial and Industrial						Commercial Mortgages						Residential Mortgages						Consumer Loans						Total
Individually analyzed			$	1,676					$	4,692					$	—					$	—					$	6,368
Collectively analyzed			294,056						1,255,564						275,448						266,200						2,091,268
Total ending loans balance			$	295,732					$	1,260,256					$	275,448					$	266,200					$	2,097,636

			December 31, 2024
Amortized cost basis of loans:			Commercial and Industrial						Commercial Mortgages						Residential Mortgages						Consumer Loans						Total
Individually analyzed			$	1,512					$	4,959					$	—					$	—					$	6,471
Collectively analyzed			298,009						1,212,045						274,979						279,915						2,064,948
Total ending loans balance			$	299,521					$	1,217,004					$	274,979					$	279,915					$	2,071,419

Schedule of Recorded Investment in Past Due and Non-Accrual Status by Class of Loans

The following tables present the performance of such loans that were modified in the twelve month periods preceding March 31, 2025 and March 31, 2024 (in thousands):

			Twelve Months Ended March 31, 2025
Past Due Status of Modifications under ASU 2022-02:			30-59 Days Past Due						60-89 Days Past Due						Greater Than 89 Days Past Due						Loans Not Past Due						Total
Commercial and industrial			$	—					$	—					$	—					$	367					$	367
Commercial mortgages:
Owner occupied commercial real estate			—						—						—						374						374
Residential mortgages			—						—						—						436						436
Total			$	—					$	—					$	—					$	1,177					$	1,177

			Twelve Months Ended March 31, 2024
Past Due Status of Modifications under ASU 2022-02:			30-59 Days Past Due						60-89 Days Past Due						Greater Than 89 Days Past Due						Loans Not Past Due						Total
Commercial and industrial			$	—					$	—					$	675					$	129					$	804
Consumer loans:
Home equity lines and loans			—						—						—						116						116
Total			$	—					$	—					$	675					$	245					$	920

The following table presents the amortized cost basis of nonaccrual loans without an associated allocation in the allowance for credit losses, total nonaccrual loans, and loans past due greater than 90 days and still accruing, by class of loan as of March 31, 2025 and December 31, 2024 (in thousands):

			Nonaccrual with No Allowance for Credit Losses												Nonaccrual												Loans Past Due 90 Days or More and Still Accruing
			March 31, 2025						December 31, 2024						March 31, 2025						December 31, 2024						March 31, 2025						December 31, 2024
Commercial and industrial			$	74					$	76					$	1,697					$	1,534					$	24					$	23
Commercial mortgages:
Construction			—						—						—						—						—						—
Owner occupied commercial real estate			1,330						1,362						1,342						1,377						—						—
Non-owner occupied commercial real estate			1,183						2,619						3,350						3,582						—						—
Residential mortgages			1,697						1,372						1,697						1,372						—						—
Consumer loans:
Home equity lines and loans			1,034						613						1,034						613						—						—
Indirect consumer loans			712						474						712						474						—						—
Direct consumer loans			49						2						49						2						—						—
Total			$	6,079					$	6,518					$	9,881					$	8,954					$	24					$	23

There was an immaterial amount of interest income recognized on nonaccrual loans for the three month periods ended March 31, 2025 and 2024. Payments received on nonaccrual loans are generally applied to principal using the cost recovery method.

The following tables present the aging of the amortized cost basis of loans as of March 31, 2025 and December 31, 2024 (in thousands):

			March 31, 2025
			30 - 59 Days Past Due						60 - 89 Days Past Due						90 Days or More Past Due						Total Past Due												Loans Not Past Due						Total
Commercial and industrial			$	854					$	38					$	914					$	1,806											$	293,926					$	295,732
Commercial mortgages:
Construction			2,159						—						—						2,159												93,512						95,671
Owner occupied commercial real estate			425						—						96						521												154,506						155,027
Non-owner occupied commercial real estate			—						—						3,181						3,181												1,006,377						1,009,558
Residential mortgages			2,769						—						337						3,106												272,342						275,448
Consumer loans:
Home equity lines and loans			341						—						640						981												92,933						93,914
Indirect consumer loans			1,819						291						281						2,391												162,203						164,594
Direct consumer loans			8						6						15						29												7,663						7,692
Total			$	8,375					$	335					$	5,464					$	14,174											$	2,083,462					$	2,097,636

			December 31, 2024
			30 - 59 Days Past Due						60 - 89 Days Past Due						90 Days or More Past Due						Total Past Due												Loans Not Past Due						Total
Commercial and industrial			$	140					$	201					$	702					$	1,043											$	298,478					$	299,521
Commercial mortgages:
Construction			—						—						—						—												94,943						94,943
Owner occupied commercial real estate			82						—						96						178												142,101						142,279
Non-owner occupied commercial real estate			950						—						3,162						4,112												975,670						979,782
Residential mortgages			1,529						662						696						2,887												272,092						274,979
Consumer loans:
Home equity lines and loans			231						—						364						595												92,625						93,220
Indirect consumer loans			2,101						719						235						3,055												175,063						178,118
Direct consumer loans			14						6						1						21												8,556						8,577
Total			$	5,047					$	1,588					$	5,256					$	11,891											$	2,059,528					$	2,071,419

Schedule of Analysis of Collateral Dependent Loans

The following table presents the amortized cost basis and related allowance for credit loss of individually analyzed loans considered to be collateral-dependent as of March 31, 2025 and December 31, 2024 (in thousands):

			March 31, 2025												December 31, 2024
			Amortized Cost Basis						Related Allowance						Amortized Cost Basis						Related Allowance
Commercial and industrial (3)			$	320					$	159					$	130					$	65
Commercial mortgages:
Owner occupied commercial real estate (1) (2)			1,342						12						1,377						15
Non-owner occupied commercial real estate (1) (2)			3,350						128						3,582						91
Total			$	5,012					$	299					$	5,089					$	171

(1) Secured by commercial real estate

(2) Secured by residential real estate

(3) Secured by business assets

Schedule of Impaired Financing Receivables

Schedule of Risk Category of the Recorded Investment of Loans by Class of Loans

Based on the analyses performed as of March 31, 2025, the amortized cost basis of loans by class, risk category, and vintage, as well as gross charge-offs by class and vintage for the three month period ended March 31, 2025, were as follows (in thousands):

			Term Loans Amortized Cost by Origination Year																																				Revolving Loans Amortized Cost						Revolving Loans Converted to Term						Total
			2025						2024						2023						2022						2021						Prior
Commercial & industrial
Pass			$	13,238					$	39,353					$	30,511					$	33,249					$	15,512					$	29,362					$	106,238					$	2,427					$	269,890
Special mention			—						664						429						4,112						450						7,801						7,124						2,650						23,230
Substandard			—						367						—						4						730						—						520						309						1,930
Doubtful			—						21						—						—						—						661						—						—						682
Total			13,238						40,405						30,940						37,365						16,692						37,824						113,882						5,386						295,732
Gross charge-offs			—						—						—						—						—						—						5						—						5
Construction
Pass			5,033						21,401						39,868						18,406						8,996						1,484						483						—						95,671
Special mention			—						—						—						—						—						—						—						—						—
Substandard			—						—						—						—						—						—						—						—						—
Doubtful			—						—						—						—						—						—						—						—						—
Total			5,033						21,401						39,868						18,406						8,996						1,484						483						—						95,671
Gross charge-offs			—						—						—						—						—						—						—						—						—
Owner occupied commercial real estate
Pass			13,848						23,872						20,294						24,369						20,101						38,794						896						51						142,225
Special mention			—						—						2,802						2,220						692						2,771						2,000						—						10,485
Substandard			—						—						96						841						317						1,051						—						—						2,305
Doubtful			—						—						—						—						—						12						—						—						12
Total			13,848						23,872						23,192						27,430						21,110						42,628						2,896						51						155,027
Gross charge-offs			—						—						—						—						—						—						—						—						—
Non-owner occupied commercial real estate
Pass			33,419						101,231						111,244						263,465						140,798						321,071						7,366						764						979,358
Special mention			—						—						3,586						7,225						7,690						7,734						—						—						26,235
Substandard			—						—						2,167						142						—						1,656						—						—						3,965
Doubtful			—						—						—						—						—						—						—						—						—
Total			33,419						101,231						116,997						270,832						148,488						330,461						7,366						764						1,009,558
Gross charge-offs			—						—						—						—						—						—						—						—						—
Residential mortgages
Not rated			5,205						23,364						20,232						54,173						54,150						116,497						—						—						273,621
Substandard			—						—						—						85						625						1,117						—						—						1,827
Total			5,205						23,364						20,232						54,258						54,775						117,614						—						—						275,448
Gross charge-offs			—						—						—						—						—						—						—						—						—
Home equity lines and loans
Not rated			3,099						13,445						10,074						12,938						4,668						12,109						35,303						1,130						92,766
Special mention			—						—						—						114						—						—						—						—						114
Substandard			—						—						23						176						—						190						96						549						1,034
Total			3,099						13,445						10,097						13,228						4,668						12,299						35,399						1,679						93,914
Gross charge-offs			—						—						—						—						—						—						—						—						—
Indirect consumer
Not rated			4,918						35,199						47,215						59,984						11,299						5,243						—						—						163,858
Substandard			—						102						292						232						58						52						—						—						736
Total			4,918						35,301						47,507						60,216						11,357						5,295						—						—						164,594
Gross charge-offs			—						57						178						82						34						28						—						—						379
Direct consumer
Not rated			494						2,064						1,346						1,181						192						226						2,157						7						7,667
Substandard			—						—						7						—						—						—						10						8						25
Total			494						2,064						1,353						1,181						192						226						2,167						15						7,692
Gross charge-offs			—						—						8						—						3						1						2						—						14
Total loans			$	79,254					$	261,083					$	290,186					$	482,916					$	266,278					$	547,831					$	162,193					$	7,895					$	2,097,636
Total gross charge-offs			$	—					$	57					$	186					$	82					$	37					$	29					$	7					$	—					$	398

Based on the analyses performed as of December 31, 2024, the amortized cost basis of loans by class, risk category, and vintage, as well as gross charge-offs by class and vintage for the year ended December 31, 2024, were as follows (in thousands):

			Term Loans Amortized Cost by Origination Year																																				Revolving Loans Amortized Cost						Revolving Loans Converted to Term						Total
			2024						2023						2022						2021						2020						Prior
Commercial & industrial
Pass			$	44,130					$	32,157					$	34,862					$	16,787					$	8,326					$	27,452					$	108,819					$	1,380					$	273,913
Special mention			810						262						3,933						—						4,390						3,673						10,203						62						23,333
Substandard			99						—						8						733						30						—						379						318						1,567
Doubtful			21						—						—						—						—						687						—						—						708
Total			45,060						32,419						38,803						17,520						12,746						31,812						119,401						1,760						299,521
Gross charge-offs			—						84						200						6						—						—						12						—						302
Construction
Pass			19,344						46,954						17,568						9,058						—						1,536						483						—						94,943
Special mention			—						—						—						—						—						—						—						—						—
Substandard			—						—						—						—						—						—						—						—						—
Doubtful			—						—						—						—						—						—						—						—						—
Total			19,344						46,954						17,568						9,058						—						1,536						483						—						94,943
Gross charge-offs			—						—						—						—						—						—						—						—						—
Owner occupied commercial real estate
Pass			23,196						23,185						26,945						20,979						9,513						31,222						97						55						135,192
Special mention			—						370						—						109						—						2,206						2,000						—						4,685
Substandard			—						96						863						321						—						1,107						—						—						2,387
Doubtful			—						—						—						—						—						15						—						—						15
Total			23,196						23,651						27,808						21,409						9,513						34,550						2,097						55						142,279
Gross charge-offs			—						—						—						—						—						—						—						—						—
Non-owner occupied commercial real estate
Pass			97,155						109,354						267,280						141,864						97,828						233,084						6,696						777						954,038
Special mention			—						—						5,935						7,793						—						7,833						—						—						21,561
Substandard			—						2,148						146						—						1,014						875						—						—						4,183
Doubtful			—						—						—						—						—						—						—						—						—
Total			97,155						111,502						273,361						149,657						98,842						241,792						6,696						777						979,782
Gross charge-offs			—						—						—						—						—						—						—						—						—
Residential mortgages
Not rated			21,574						20,257						55,321						55,152						64,471						56,708						—						—						273,483
Substandard			—						—						85						771						220						420						—						—						1,496
Total			21,574						20,257						55,406						55,923						64,691						57,128						—						—						274,979
Gross charge-offs			—						—						—						—						—						21						—						—						21
Home equity lines and loans
Not rated			13,833						10,657						14,094						4,879						2,503						10,259						35,015						1,252						92,492
Special mention			—						—						115						—						—						—						—						—						115
Substandard			—						24						63						—						—						195						116						215						613
Total			13,833						10,681						14,272						4,879						2,503						10,454						35,131						1,467						93,220
Gross charge-offs			—						—						1						—						—						11						1						—						13
Indirect consumer
Not rated			37,746						52,480						67,237						13,266						4,194						2,726						—						—						177,649
Substandard			75						157						107						79						11						40						—						—						469
Total			37,821						52,637						67,344						13,345						4,205						2,766						—						—						178,118
Gross charge-offs			47						517						525						161						99						116						—						—						1,465
Direct consumer
Not rated			2,420						1,681						1,454						275						41						225						2,455						14						8,565
Substandard			—						—						—						—						—						—						10						2						12
Total			2,420						1,681						1,454						275						41						225						2,465						16						8,577
Gross charge-offs			5						21						20						14						—						4						8						—						72
Total loans			$	260,403					$	299,782					$	496,016					$	272,066					$	192,541					$	380,263					$	166,273					$	4,075					$	2,071,419
Total gross charge-offs			$	52					$	622					$	746					$	181					$	99					$	152					$	21					$	—					$	1,873

X

- Definition

Financing Receivable, Troubled Debt

+ References

No definition available.

+ Details

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Namespace Prefix:	chmg_
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- Definition

Schedule Of Analysis Of Collateral Dependent Loans

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No definition available.

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X

- Definition

Tabular disclosure of allowance for credit loss on financing receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

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Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics.

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Tabular disclosure of aging analysis for financing receivable.

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Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.

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