Borrowings - Schedule of Maturities Other Borrowings (Detail) - Other Borrowings [Member] $ in Thousands	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
2016	$ 1,079
2017	10,730
2018	534
2019	389
2020 and beyond	733
Long term Debt, Total	$ 13,465
Weighted Average Interest Rate, 2016	1.58%
Weighted Average Interest Rate, 2017	3.44%
Weighted Average Interest Rate, 2018	1.16%
Weighted Average Interest Rate, 2019	1.16%
Weighted Average Interest Rate, 2020 and beyond	1.16%
Total	3.01%

Long term debt maturities repayments of principal in year five and after.

No definition available.

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

- Definition

Long Term Debt Maturities Weighted Average Interest Rate

+ References

No definition available.

+ Details

Name:	csbb_LongTermDebtMaturitiesWeightedAverageInterestRate
Namespace Prefix:	csbb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Long Term Debt Maturities Weighted Average Interest Rate In Next Twelve Months

+ References

No definition available.

+ Details

Name:	csbb_LongTermDebtMaturitiesWeightedAverageInterestRateInNextTwelveMonths
Namespace Prefix:	csbb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Long term debt maturities weighted average interest rate in year five and after.

+ References

No definition available.

+ Details

Name:	csbb_LongTermDebtMaturitiesWeightedAverageInterestRateInYearFiveAndAfter
Namespace Prefix:	csbb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Long Term Debt Maturities Weighted Average Interest Rate In Year Four

+ References

No definition available.

+ Details

Name:	csbb_LongTermDebtMaturitiesWeightedAverageInterestRateInYearFour
Namespace Prefix:	csbb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Long Term Debt Maturities Weighted Average Interest Rate In Year Three

+ References

No definition available.

+ Details

Name:	csbb_LongTermDebtMaturitiesWeightedAverageInterestRateInYearThree
Namespace Prefix:	csbb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Long Term Debt Maturities Weighted Average Interest Rate In Year Two

+ References

No definition available.

+ Details

Name:	csbb_LongTermDebtMaturitiesWeightedAverageInterestRateInYearTwo
Namespace Prefix:	csbb_
Data Type:	num:percentItemType
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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04.(a))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

+ Details

Name:	us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

Name:	us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04.(a))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

+ Details

Name:	us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

Name:	us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=csbb_OtherBorrowingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: