Restrictions on Cash and Due From Banks (Details Textual) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Reserve Balance With Federal Reserve Bank	$ 594,000	$ 1,230,000

It represents reserve balance is required to be maintained by bank with Federal Reserve bank.

No definition available.

Name:	csbq_ReserveBalanceWithFederalReserveBank
Namespace Prefix:	csbq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant