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Financial Instruments With Off-Balance-Sheet Risk (Details Textual) (USD $) | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Undisbursed Loan | $ 37,415,000 | $ 24,972,000
Letters of Credit Outstanding, Amount | $ 3,214,000 | $ 2,598,000

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
- 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