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Loans and Allowance for Loan Losses (Details 4) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Balance, beginning of year | $ 3,203,158us-gaap_LoansAndLeasesReceivableAllowance | $ 6,141,281us-gaap_LoansAndLeasesReceivableAllowance | $ 7,400,049us-gaap_LoansAndLeasesReceivableAllowance
Provision for loan losses | 515,000us-gaap_ProvisionForLoanAndLeaseLosses | 300,000us-gaap_ProvisionForLoanAndLeaseLosses | 430,000us-gaap_ProvisionForLoanAndLeaseLosses
Charge-offs | (1,581,992)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs | (4,708,605)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs | (2,868,576)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
Recoveries | 1,358,963us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts | 1,470,482us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts | 1,179,808us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
Balance, end of year | 3,495,129us-gaap_LoansAndLeasesReceivableAllowance | 3,203,158us-gaap_LoansAndLeasesReceivableAllowance | 6,141,281us-gaap_LoansAndLeasesReceivableAllowance
Commercial Real Estate Mortgage [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Balance, beginning of year | 1,549,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 2,549,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember |
Provision for loan losses | 360,000us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 811,000us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember |
Charge-offs | (470,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | (1,879,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember |
Recoveries | 156,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 68,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember |
Balance, end of year | 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] |  |  |
Balance, beginning of year | 938,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 1,528,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember |
Provision for loan losses | 731,000us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 11,000us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember |
Charge-offs | (896,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | (842,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember |
Recoveries | 324,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 241,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember |
Balance, end of year | 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] |  |  |
Balance, beginning of year | 319,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 1,241,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember |
Provision for loan losses | (902,000)us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | (787,000)us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember |
Charge-offs | (58,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | (1,193,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember |
Recoveries | 771,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 1,058,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember |
Balance, end of year | 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] |  |  |
Balance, beginning of year | 352,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 809,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember |
Provision for loan losses | 336,000us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 143,000us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember |
Charge-offs | (108,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | (699,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember |
Recoveries | 58,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 99,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember |
Balance, end of year | 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] |  |  |
Balance, beginning of year | 45,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 14,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember |
Provision for loan losses | (10,000)us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 122,000us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember |
Charge-offs | (50,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | (96,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember |
Recoveries | 50,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 5,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember |
Balance, end of year | $ 35,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | $ 45,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember |

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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + 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 (c)(3) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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- Definition 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 + Details
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- Definition Amount of expense related to estimated loss from loan and lease transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 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)(2) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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