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Loans and Allowance for Loan Losses (Details 6) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans without a valuation allowance, Recorded Investment | $ 5,952us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment | $ 9,895us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment | $ 6,274us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
Impaired loans without a valuation allowance, Unpaid Principal Balance | 6,073us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance | 10,060us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance | 6,399us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
Impaired loans without a valuation allowance, Average Recorded Investment | 7,914us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment | 9,541us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment | 8,562us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
Impaired loans without a valuation allowance, Interest Income Recognized | 326us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod | 519us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod | 306us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod
Impaired loans with a valuation allowance, Recorded Investment | 2,886us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment | 3,895us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment | 8,915us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Impaired loans with a valuation allowance, Unpaid Principal Balance | 3,021us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance | 3,996us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance | 8,956us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
Impaired loans with a valuation allowance, Related Allowance | 696us-gaap_ImpairedFinancingReceivableRelatedAllowance | 564us-gaap_ImpairedFinancingReceivableRelatedAllowance | 4,046us-gaap_ImpairedFinancingReceivableRelatedAllowance
Impaired loans with a valuation allowance, Average Recorded Investment | 1,760us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment | 6,996us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment | 10,564us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
Impaired loans with a valuation allowance, Interest Income Recognized | 174us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod | 261us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod | 457us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod
Total impaired loans, Recorded Investment | 8,838us-gaap_ImpairedFinancingReceivableRecordedInvestment | 13,790us-gaap_ImpairedFinancingReceivableRecordedInvestment | 15,189us-gaap_ImpairedFinancingReceivableRecordedInvestment
Total impaired loans, Unpaid Principal Balance | 9,094us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance | 14,056us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance | 15,355us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Total impaired loans, Related Allowance | 696csbq_ImpairedFinancingReceivableRelatedAllowanceTotal | 564csbq_ImpairedFinancingReceivableRelatedAllowanceTotal | 4,046csbq_ImpairedFinancingReceivableRelatedAllowanceTotal
Total impaired loans, Average Recorded Investment | 9,674us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment | 16,537us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment | 19,126us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Total impaired loans, Interest Income Recognized | 500us-gaap_ImpairedFinancingReceivableInterestIncomeCashBasisMethod | 780us-gaap_ImpairedFinancingReceivableInterestIncomeCashBasisMethod | 763us-gaap_ImpairedFinancingReceivableInterestIncomeCashBasisMethod
Commercial Real Estate Mortgage [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 2,428us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 5,786us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 3,406us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Impaired loans without a valuation allowance, Unpaid Principal Balance | 2,480us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 5,854us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 3,453us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Impaired loans without a valuation allowance, Average Recorded Investment | 4,386us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 4,657us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 4,389us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Impaired loans without a valuation allowance, Interest Income Recognized | 127us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 340us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 180us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Impaired loans with a valuation allowance, Recorded Investment | 2,029us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 2,196us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 5,807us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Impaired loans with a valuation allowance, Unpaid Principal Balance | 2,029us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 2,285us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 5,848us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Impaired loans with a valuation allowance, Related Allowance | 404us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 498us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 2,230us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Impaired loans with a valuation allowance, Average Recorded Investment | 683us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 4,869us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 6,616us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Impaired loans with a valuation allowance, Interest Income Recognized | 98us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 118us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember | 215us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Consumer Real Estate Mortgage [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 1,738us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 2,177us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 513us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Impaired loans without a valuation allowance, Unpaid Principal Balance | 1,742us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 2,202us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 540us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Impaired loans without a valuation allowance, Average Recorded Investment | 1,880us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 2,669us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 1,538us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Impaired loans without a valuation allowance, Interest Income Recognized | 114us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 96us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 52us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Impaired loans with a valuation allowance, Recorded Investment | 341us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 1,270us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 1,353us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Impaired loans with a valuation allowance, Unpaid Principal Balance | 476us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 1,281us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 1,353us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Impaired loans with a valuation allowance, Related Allowance | 15us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 11us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 576us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Impaired loans with a valuation allowance, Average Recorded Investment | 676us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 1,353us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 2,606us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Impaired loans with a valuation allowance, Interest Income Recognized | 24us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 90us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember | 61us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Construction and Land Development [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 753us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 369us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 244us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Impaired loans without a valuation allowance, Unpaid Principal Balance | 766us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 383us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 251us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Impaired loans without a valuation allowance, Average Recorded Investment | 462us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 358us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 358us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Impaired loans without a valuation allowance, Interest Income Recognized | 44us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 23us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 19us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Impaired loans with a valuation allowance, Recorded Investment | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 706us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Impaired loans with a valuation allowance, Unpaid Principal Balance | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 706us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Impaired loans with a valuation allowance, Related Allowance | 0us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 0us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 460us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Impaired loans with a valuation allowance, Average Recorded Investment | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 177us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 642us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Impaired loans with a valuation allowance, Interest Income Recognized | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember | 49us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Commercial and Industrial Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 1,033us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 1,563us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 2,111us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Impaired loans without a valuation allowance, Unpaid Principal Balance | 1,085us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 1,621us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 2,155us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Impaired loans without a valuation allowance, Average Recorded Investment | 1,186us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 1,857us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 2,277us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Impaired loans without a valuation allowance, Interest Income Recognized | 41us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 60us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 55us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Impaired loans with a valuation allowance, Recorded Investment | 516us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 429us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 1,049us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Impaired loans with a valuation allowance, Unpaid Principal Balance | 516us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 430us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 1,049us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Impaired loans with a valuation allowance, Related Allowance | 277us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 55us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 780us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Impaired loans with a valuation allowance, Average Recorded Investment | 401us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 597us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 700us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Impaired loans with a valuation allowance, Interest Income Recognized | 52us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 53us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember | 132us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Consumer and Other Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember
Impaired loans without a valuation allowance, Unpaid Principal Balance | 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember
Impaired loans without a valuation allowance, Average Recorded Investment | 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember
Impaired loans without a valuation allowance, Interest Income Recognized | 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember
Impaired loans with a valuation allowance, Recorded Investment | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember
Impaired loans with a valuation allowance, Unpaid Principal Balance | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember
Impaired loans with a valuation allowance, Related Allowance | 0us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember
Impaired loans with a valuation allowance, Average Recorded Investment | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember | 0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember
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