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Employee Benefit Plans (Details Textual) (USD $) | 12 Months Ended
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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 / us-gaap_PlanNameAxis = 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

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- Definition Represents the percentage of employer contribution for purchasing common stock under employee stock ownership plan and allocated the contribution among the participants based on regulatory guidelines. + References No definition available. + Details
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- Details
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- Definition Maximum amount the employee may contribute to a defined contribution plan. + References No definition available. + Details
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- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Percentage of vesting of share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Details
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