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Federal Home Loan Bank Advances and Other Borrowings (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Long-term Federal Home Loan Bank Advances $ 36,000,000us-gaap_FederalHomeLoanBankAdvancesLongTerm $ 25,000,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
Long Term Advance Dated February 9 2005 [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Long-term Federal Home Loan Bank Advances 5,000,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_LongtermDebtTypeAxis
= csbq_LongTermAdvanceDatedFebruary92005Member		 5,000,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_LongtermDebtTypeAxis
= csbq_LongTermAdvanceDatedFebruary92005Member
Long Term Advance Dated August 13 2007 [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Long-term Federal Home Loan Bank Advances 0us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_LongtermDebtTypeAxis
= csbq_LongTermAdvanceDatedAugust132007Member		 5,000,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_LongtermDebtTypeAxis
= csbq_LongTermAdvanceDatedAugust132007Member
Long Term Advance Dated January 7 2008 [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Long-term Federal Home Loan Bank Advances 5,000,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_LongtermDebtTypeAxis
= csbq_LongTermAdvanceDatedJanuary72008Member		 5,000,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_LongtermDebtTypeAxis
= csbq_LongTermAdvanceDatedJanuary72008Member
Long Term Advance Dated January 10 2007 [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Long-term Federal Home Loan Bank Advances 5,000,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_LongtermDebtTypeAxis
= csbq_LongTermAdvanceDatedJanuary102007Member		 5,000,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_LongtermDebtTypeAxis
= csbq_LongTermAdvanceDatedJanuary102007Member
ShortTerm Advance Dated July 30 2014 [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Short-term Federal Home Loan Bank Advances 8,000,000us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate
/ us-gaap_LongtermDebtTypeAxis
= csbq_ShorttermAdvanceDatedJuly302014Member		 0us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate
/ us-gaap_LongtermDebtTypeAxis
= csbq_ShorttermAdvanceDatedJuly302014Member
Short Term Advance Dated November 20 2014 [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Short-term Federal Home Loan Bank Advances 8,000,000us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate
/ us-gaap_LongtermDebtTypeAxis
= csbq_ShortTermAdvanceDatedNovember202014Member		 0us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate
/ us-gaap_LongtermDebtTypeAxis
= csbq_ShortTermAdvanceDatedNovember202014Member
Long Term Advance Dated January 20 2006 [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Long-term Federal Home Loan Bank Advances $ 5,000,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_LongtermDebtTypeAxis
= csbq_LongTermAdvanceDatedJanuary202006Member		 $ 5,000,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_LongtermDebtTypeAxis
= csbq_LongTermAdvanceDatedJanuary202006Member