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Employee Benefit Plans (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2012
401(k) Plan    
Defined Benefit Plan Disclosure [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period 30 days  
Employee Stock Ownership Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Employee Stock Ownership Plan Esop Contribution For Purchasing Common Stock Percentage 100.00%csbq_EmployeeStockOwnershipPlanEsopContributionForPurchasingCommonStockPercentage
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= csbq_EmployeeStockOwnershipPlanMember
 
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period 1000 hours  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 100.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_PlanNameAxis
= csbq_EmployeeStockOwnershipPlanMember
 
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount $ 10,000us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount
/ us-gaap_PlanNameAxis
= csbq_EmployeeStockOwnershipPlanMember
$ 3,500us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount
/ us-gaap_PlanNameAxis
= csbq_EmployeeStockOwnershipPlanMember