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Loans and Allowance for Loan Losses (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | $ 295,364,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount | $ 289,440,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount |  |
Less: Allowance for loan losses | (3,495,129)us-gaap_LoansAndLeasesReceivableAllowance | (3,203,158)us-gaap_LoansAndLeasesReceivableAllowance | (6,141,281)us-gaap_LoansAndLeasesReceivableAllowance | (7,400,049)us-gaap_LoansAndLeasesReceivableAllowance
Loans, net | 291,869,338us-gaap_LoansAndLeasesReceivableNetReportedAmount | 286,236,578us-gaap_LoansAndLeasesReceivableNetReportedAmount |  |
Commercial Real Estate Owner Occupied [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 68,581,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateOwnerOccupiedMember | 65,747,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateOwnerOccupiedMember |  |
Commercial Real Estate All Other [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 74,587,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateAllOtherMember | 64,052,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateAllOtherMember |  |
Consumer Real Estate Mortgage [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 76,907,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 76,315,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember |  |
Less: Allowance for loan losses | (1,097,000)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | (938,000)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | (1,528,000)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember |
Construction and Land Development [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 34,449,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 41,597,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember |  |
Less: Allowance for loan losses | (130,000)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | (319,000)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | (1,241,000)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember |
Commercial and Industrial Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 37,863,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 38,999,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember |  |
Less: Allowance for loan losses | (638,000)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | (352,000)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | (809,000)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember |
Consumer and Other Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 2,977,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 2,730,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember |  |
Less: Allowance for loan losses | $ (35,000)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | $ (45,000)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | $ (14,000)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember |

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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 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 Reference 2: 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) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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