Loans listed as not rated under risk category.

No definition available.

Name:	csbb_LoansListedAsNotRatedUnderRiskCategory
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

Loans serviced for others which, upon sale, servicing rights are retained.

+ References

No definition available.

+ Details

Name:	csbb_LoansServicedForOthersRetainingServicingRights
Namespace Prefix:	csbb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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 paycheck protection program loans.

+ References

No definition available.

+ Details

Name:	csbb_NumberOfPaycheckProtectionProgramLoans
Namespace Prefix:	csbb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Paycheck protection program loans, amount received in loan forgiveness.

+ References

No definition available.

+ Details

Name:	csbb_PaycheckProtectionProgramLoansAmountReceivedInLoanForgiveness
Namespace Prefix:	csbb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Paycheck protection program loans guaranteed percentage.

+ References

No definition available.

+ Details

Name:	csbb_PaycheckProtectionProgramLoansGuaranteedPercentage
Namespace Prefix:	csbb_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Principal amount outstanding on paycheck protection program loans.

+ References

No definition available.

+ Details

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

- Definition

Reserves allocated to troubled debt restructurings.

+ References

No definition available.

+ Details

Name:	csbb_ReservesAllocatedToTroubledDebtRestructurings
Namespace Prefix:	csbb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of financing receivable modified as troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

+ Details

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

- Definition

Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

+ Details

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

- Definition

Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524

+ Details

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

- Definition

Amount of decrease in investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from foreclosure.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Footnote 6))
-URI https://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014

+ Details

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

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

+ Details

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

- Definition

Amount of increase (decrease) in the amortized amount from a decrease (increase) in the valuation allowance applied to the servicing asset for a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 4
-Subparagraph (a)(5)
-URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746

+ Details

Name:	us-gaap_ServicingAssetAtAmortizedValueValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FinancialInstrumentAxis=csbb_MortgageServicingRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_PerformingFinancingReceivableMember
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
Balance Type:
Period Type:

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis=csbb_LessorsOfNonResidentialBuildingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis=csbb_AssistedLivingFacilitiesForElderlyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis=csbb_LoggingSawmillsAndTimberTractOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis=csbb_HotelMotelAndLodgingBusinessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis=csbb_PaycheckProtectionProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Loans - Additional Information (Detail)	12 Months Ended
Loans - Additional Information (Detail)	Dec. 31, 2022 USD ($) Contract Property Industry	Dec. 31, 2021 USD ($) Loan	Dec. 31, 2020 USD ($) Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration loans	$ 626,958,000	$ 549,050,000
Loans classified as troubled debt restructurings	944,000	1,300,000
Reserves allocated to customers whose loan terms are modified in troubled debt restructurings	4,000	14,000
Loans payable in nonaccrual of interest status	$ 28,000
Loans restructured, subsequently defaulted \| Contract	0
Number of properties acquired \| Property	0
Mortgage loans in process of foreclosure amount	$ 17,000	0
Outstanding balance of commercial loans classified under credit risk, minimum amount	500,000
Loans listed as not rated under risk category, maximum amount	500,000
Loans serviced for others	137,500,000	142,100,000
Mortgage Servicing Rights [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage servicing rights	621,000	604,000
Valuation allowance	0	0
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential Mortgage Loans with servicing retained	130,100,000	133,800,000
Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructurings	$ 916,000
Credit Concentrations Risk [Member] \| Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of industries for credit concentrations \| Industry	4
Credit Concentrations Risk [Member] \| Loans Receivable [Member] \| Lessors of Non Residential Buildings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration loans	$ 73,000,000
Concentration of credit percentage of total loans	12.00%
Credit Concentrations Risk [Member] \| Loans Receivable [Member] \| Assisted Living Facilities for Elderly [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration loans	$ 26,000,000
Concentration of credit percentage of total loans	4.00%
Credit Concentrations Risk [Member] \| Loans Receivable [Member] \| Logging, Sawmills, and Timber Tract Operations [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration loans	$ 17,000,000
Concentration of credit percentage of total loans	3.00%
Credit Concentrations Risk [Member] \| Loans Receivable [Member] \| Hotel, Motel, and Lodging Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration loans	$ 17,000,000
Concentration of credit percentage of total loans	3.00%
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration loans	$ 129,343,000	123,933,000
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration loans	$ 231,785,000	$ 194,754,000
Paycheck Protection Program [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of PPP loans \| Loan		1,351	1,351
Principal amount outstanding on PPP loans		$ 128,900,000	$ 128,900,000
PPP loans guaranteed percentage	100.00%
Amount received in loan forgiveness	$ 128,500,000
Paycheck Protection Program [Member] \| Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal amount outstanding on PPP loans	$ 359,000