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

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant