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Loans and Allowance for Loan Losses (Details 2) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	$ 3,656,545us-gaap_LoansAndLeasesReceivableAllowance	$ 3,495,129us-gaap_LoansAndLeasesReceivableAllowance	$ 3,203,000us-gaap_LoansAndLeasesReceivableAllowance
Commercial Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	1,521,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember	1,595,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember	1,549,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Consumer Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	1,154,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember	1,097,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember	938,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	236,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember	130,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember	319,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	658,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember	638,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember	352,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	88,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember	35,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember	45,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember
Performing Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	3,393,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_PerformingLoansMember	2,799,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_PerformingLoansMember
Performing Loans [Member] | Commercial Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	1,470,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_PerformingLoansMember / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember	1,191,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_PerformingLoansMember / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Performing Loans [Member] | Consumer Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	1,154,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_PerformingLoansMember / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember	1,082,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_PerformingLoansMember / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Performing Loans [Member] | Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	236,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_PerformingLoansMember / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember	130,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_PerformingLoansMember / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Performing Loans [Member] | Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	445,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_PerformingLoansMember / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember	361,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_PerformingLoansMember / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Performing Loans [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	88,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_PerformingLoansMember / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember	35,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_PerformingLoansMember / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember
Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	264,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_ImpairedLoansMember	696,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_ImpairedLoansMember
Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	51,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_ImpairedLoansMember / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember	404,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_ImpairedLoansMember / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Impaired Loans [Member] | Consumer Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	0us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_ImpairedLoansMember / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember	15,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_ImpairedLoansMember / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Impaired Loans [Member] | Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	0us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_ImpairedLoansMember / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember	0us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_ImpairedLoansMember / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Impaired Loans [Member] | Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	213,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_ImpairedLoansMember / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember	277,000us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_ImpairedLoansMember / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Impaired Loans [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	$ 0us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_ImpairedLoansMember / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember	$ 0us-gaap_LoansAndLeasesReceivableAllowance / csbq_ClassificationOfLoansAxis = csbq_ImpairedLoansMember / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ 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 210.9-03.7(d))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph d

-Article 9



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (b)(1)(ii)

-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544



Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 6

-Section L

-Subsection 1

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