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Financial Instruments With Off-Balance-Sheet Risk (Details Textual) (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Undisbursed Loan | $ 46,478,000csbq_UndisbursedLoan | $ 33,664,000csbq_UndisbursedLoan
Letters of Credit Outstanding, Amount | $ 330,000us-gaap_LettersOfCreditOutstandingAmount | $ 396,000us-gaap_LettersOfCreditOutstandingAmount

X
- Definition It represents the amount of undisbursed loan as on the reporting date. + References No definition available. + Details
Name: | csbq_UndisbursedLoan
Namespace Prefix: | csbq_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant