Financing receivable allowance for credit loss specific reserve.

No definition available.

Name:	csbb_FinancingReceivableAllowanceForCreditLossSpecificReserve
Namespace Prefix:	csbb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Loans pledged as collateral dependent exposures.

+ References

No definition available.

+ Details

Name:	csbb_LoansPledgedAsCollateralDependentExposures
Namespace Prefix:	csbb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Loans serviced for others.

+ References

No definition available.

+ Details

Name:	csbb_LoansServicedForOthers
Namespace Prefix:	csbb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Minimum balance commercial loans rated.

+ References

No definition available.

+ Details

Name:	csbb_MinimumBalanceCommercialLoansRated
Namespace Prefix:	csbb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of industries for credit concentrations.

+ References

No definition available.

+ Details

Name:	csbb_NumberOfIndustriesForCreditConcentrations
Namespace Prefix:	csbb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of loans secured.

+ References

No definition available.

+ Details

Name:	csbb_NumberOfLoansSecured
Namespace Prefix:	csbb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of interest income on financing receivable on nonaccrual status.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 20
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-16

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
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-Subparagraph (SX 210.7-03(a)(1)(c))
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
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-Name Regulation S-K (SK)
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=csbb_ConsumerMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=csbb_ConsumerRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_IndustrialPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=csbb_CommercialRealEstateAndCommercialLessorsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_WarehouseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=us-gaap_HealthCareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=csbb_ResidentialInvestmentPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=csbb_RetailStripCentersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=csbb_SeniorHousingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=csbb_AutomotiveIndustryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=csbb_RetailBuildingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=csbb_LodgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_OfficeBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CreditConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_LoansReceivableMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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- Details

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Loans - Additional Information (Detail)	6 Months Ended
Loans - Additional Information (Detail)	Jun. 30, 2024 USD ($) Loan Industry	Dec. 31, 2023 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans serviced for others	$ 136,000,000	$ 132,000,000
Total Loans	721,916,000	$ 701,404,000
Outstanding balance of commercial loans classified under credit risk, minimum amount	500,000
Loan relationship specific reserve	4,100,000
Consumer Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income recognized on nonaccrual loans	33,000
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans on consumer real estate	$ 38,000
Number of loans secured \| Loan	2
Industrial, Manufacturing and Production [Member] \| Commercial Real Estate and Commercial Lessors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral dependent exposures	$ 57,000,000
Warehouses [Member] \| Commercial Real Estate and Commercial Lessors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral dependent exposures	38,000,000
Health Care [Member] \| Commercial Real Estate and Commercial Lessors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral dependent exposures	27,000,000
Residential Investment Property [Member] \| Commercial Real Estate and Commercial Lessors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral dependent exposures	24,000,000
Retail Strip Centers [Member] \| Commercial Real Estate and Commercial Lessors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral dependent exposures	17,000,000
Senior Housing [Member] \| Commercial Real Estate and Commercial Lessors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral dependent exposures	17,000,000
Automotive Industry [Member] \| Commercial Real Estate and Commercial Lessors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral dependent exposures	15,000,000
Retail Buildings [Member] \| Commercial Real Estate and Commercial Lessors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral dependent exposures	14,000,000
Lodging [Member] \| Commercial Real Estate and Commercial Lessors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral dependent exposures	11,000,000
Office Building [Member] \| Commercial Real Estate and Commercial Lessors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral dependent exposures	$ 8,000,000
Credit Concentration Risk [Member] \| Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of industries for credit concentrations \| Industry	3
Credit Concentration Risk [Member] \| Loans Receivable [Member] \| Lessors of Non Residential Buildings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 75,800,000
Concentration of credit percentage of total loans	11.00%
Credit Concentration Risk [Member] \| Loans Receivable [Member] \| Manufacturers of Animal Food [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 39,300,000
Concentration of credit percentage of total loans	5.00%
Credit Concentration Risk [Member] \| Loans Receivable [Member] \| Hotels [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 30,500,000
Concentration of credit percentage of total loans	4.00%