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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 2) (Fair Value, Inputs, Level 3 [Member], USD $)
12 Months Ended
Dec. 31, 2014
Commercial Real Estate Portfolio Segment [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Collateral Dependent Impaired loans 9,696,000czbs_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Commercial Real Estate Portfolio Segment [Member] | Minimum [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Negative adjustment for selling costs and changes in market conditions since appraisal (as a percent) 5.00%czbs_FairValueInputsAdjustmentForSellingCostsAndChangesInMarketConditions
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Commercial Real Estate Portfolio Segment [Member] | Maximum [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Negative adjustment for selling costs and changes in market conditions since appraisal (as a percent) 20.00%czbs_FairValueInputsAdjustmentForSellingCostsAndChangesInMarketConditions
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Single Family Residential Mortgage [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Collateral Dependent Impaired loans 229,000czbs_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Single Family Residential Mortgage [Member] | Minimum [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Negative adjustment for selling costs and changes in market conditions since appraisal (as a percent) 5.00%czbs_FairValueInputsAdjustmentForSellingCostsAndChangesInMarketConditions
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Single Family Residential Mortgage [Member] | Maximum [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Negative adjustment for selling costs and changes in market conditions since appraisal (as a percent) 20.00%czbs_FairValueInputsAdjustmentForSellingCostsAndChangesInMarketConditions
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_ResidentialMortgageMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Other real estate owned [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Collateral Dependent Impaired loans 4,668,000czbs_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= czbs_OtherRealEstateOwnedMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Other real estate owned [Member] | Minimum [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Negative adjustment for selling costs and changes in market conditions since appraisal (as a percent) 5.00%czbs_FairValueInputsAdjustmentForSellingCostsAndChangesInMarketConditions
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= czbs_OtherRealEstateOwnedMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Other real estate owned [Member] | Maximum [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Negative adjustment for selling costs and changes in market conditions since appraisal (as a percent) 20.00%czbs_FairValueInputsAdjustmentForSellingCostsAndChangesInMarketConditions
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= czbs_OtherRealEstateOwnedMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Construction and Development Portfolio Segment [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Collateral Dependent Impaired loans 219,000czbs_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= czbs_ConstructionAndDevelopmentPortfolioSegmentMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Construction and Development Portfolio Segment [Member] | Minimum [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Negative adjustment for selling costs and changes in market conditions since appraisal (as a percent) 5.00%czbs_FairValueInputsAdjustmentForSellingCostsAndChangesInMarketConditions
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= czbs_ConstructionAndDevelopmentPortfolioSegmentMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Construction and Development Portfolio Segment [Member] | Maximum [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Negative adjustment for selling costs and changes in market conditions since appraisal (as a percent) 20.00%czbs_FairValueInputsAdjustmentForSellingCostsAndChangesInMarketConditions
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= czbs_ConstructionAndDevelopmentPortfolioSegmentMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_RangeAxis
= us-gaap_MaximumMember