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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities available for sale: $ 126,610,811us-gaap_AvailableForSaleSecurities $ 141,045,282us-gaap_AvailableForSaleSecurities  
Other real estate owned 4,668,152us-gaap_RealEstateAcquiredThroughForeclosure 7,404,437us-gaap_RealEstateAcquiredThroughForeclosure 8,194,955us-gaap_RealEstateAcquiredThroughForeclosure
State, county and municipal securities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities available for sale: 29,693,231us-gaap_AvailableForSaleSecurities
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34,801,788us-gaap_AvailableForSaleSecurities
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Mortgage Backed Securities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities available for sale: 86,914,702us-gaap_AvailableForSaleSecurities
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= us-gaap_MortgageBackedSecuritiesMember
96,267,274us-gaap_AvailableForSaleSecurities
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= us-gaap_MortgageBackedSecuritiesMember
 
Corporate Securities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities available for sale: 10,002,878us-gaap_AvailableForSaleSecurities
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= us-gaap_CorporateDebtSecuritiesMember
9,976,220us-gaap_AvailableForSaleSecurities
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Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral Dependent Impaired loans 9,696,000czbs_ImpairedFinancingReceivableFairValueDisclosure
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Fair Value, Inputs, Level 3 [Member] | Single Family Residential Mortgage [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral Dependent Impaired loans 229,000czbs_ImpairedFinancingReceivableFairValueDisclosure
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Fair Value, Inputs, Level 3 [Member] | Other real estate owned [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral Dependent Impaired loans 4,668,000czbs_ImpairedFinancingReceivableFairValueDisclosure
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Fair Value, Inputs, Level 3 [Member] | Construction and Development Portfolio Segment [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral Dependent Impaired loans 219,000czbs_ImpairedFinancingReceivableFairValueDisclosure
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Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities available for sale: 126,611,000us-gaap_AvailableForSaleSecurities
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141,045,000us-gaap_AvailableForSaleSecurities
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= us-gaap_FairValueMeasurementsRecurringMember
 
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | State, county and municipal securities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities available for sale: 29,693,000us-gaap_AvailableForSaleSecurities
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34,802,000us-gaap_AvailableForSaleSecurities
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Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities available for sale: 86,915,000us-gaap_AvailableForSaleSecurities
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96,267,000us-gaap_AvailableForSaleSecurities
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Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Securities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities available for sale: 10,003,000us-gaap_AvailableForSaleSecurities
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9,976,000us-gaap_AvailableForSaleSecurities
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Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities available for sale: 126,611,000us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
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141,045,000us-gaap_AvailableForSaleSecurities
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Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | State, county and municipal securities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities available for sale: 29,693,000us-gaap_AvailableForSaleSecurities
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34,802,000us-gaap_AvailableForSaleSecurities
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= us-gaap_USStatesAndPoliticalSubdivisionsMember
 
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Mortgage Backed Securities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities available for sale: 86,915,000us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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96,267,000us-gaap_AvailableForSaleSecurities
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Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Corporate Securities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities available for sale: 10,003,000us-gaap_AvailableForSaleSecurities
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9,976,000us-gaap_AvailableForSaleSecurities
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Fair Value, Measurements, Nonrecurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral dependent impaired loans and Other real estate owned 14,812,000czbs_ImpairedFinancingReceivableAndRealEstateAcquiredThroughForeclosureFairValueDisclosure
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18,466,000czbs_ImpairedFinancingReceivableAndRealEstateAcquiredThroughForeclosureFairValueDisclosure
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Fair Value, Measurements, Nonrecurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial Real Estate Portfolio Segment [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral Dependent Impaired loans 9,696,000czbs_ImpairedFinancingReceivableFairValueDisclosure
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10,702,000czbs_ImpairedFinancingReceivableFairValueDisclosure
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Fair Value, Measurements, Nonrecurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Single Family Residential Mortgage [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral Dependent Impaired loans 229,000czbs_ImpairedFinancingReceivableFairValueDisclosure
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360,000czbs_ImpairedFinancingReceivableFairValueDisclosure
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Fair Value, Measurements, Nonrecurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other real estate owned [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other real estate owned 4,668,000us-gaap_RealEstateAcquiredThroughForeclosure
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7,404,000us-gaap_RealEstateAcquiredThroughForeclosure
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Fair Value, Measurements, Nonrecurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Construction and Development Portfolio Segment [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral Dependent Impaired loans 219,000czbs_ImpairedFinancingReceivableFairValueDisclosure
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Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral dependent impaired loans and Other real estate owned 14,812,000czbs_ImpairedFinancingReceivableAndRealEstateAcquiredThroughForeclosureFairValueDisclosure
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18,466,000czbs_ImpairedFinancingReceivableAndRealEstateAcquiredThroughForeclosureFairValueDisclosure
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Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral Dependent Impaired loans 9,696,000czbs_ImpairedFinancingReceivableFairValueDisclosure
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10,702,000czbs_ImpairedFinancingReceivableFairValueDisclosure
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Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Single Family Residential Mortgage [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral Dependent Impaired loans 229,000czbs_ImpairedFinancingReceivableFairValueDisclosure
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
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360,000czbs_ImpairedFinancingReceivableFairValueDisclosure
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Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other real estate owned [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other real estate owned 4,668,000us-gaap_RealEstateAcquiredThroughForeclosure
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7,404,000us-gaap_RealEstateAcquiredThroughForeclosure
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Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Construction and Development Portfolio Segment [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral Dependent Impaired loans $ 219,000czbs_ImpairedFinancingReceivableFairValueDisclosure
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