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STOCK OPTIONS (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Shares      
Outstanding-beginning of year (in shares) 49,277us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 89,877us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber  
Exercised (in shares)        
Expired/Terminated (in shares)    (40,600)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod (13,676)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
Outstanding-end of year (in shares) 49,277us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 49,277us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 89,877us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Options exercisable at year-end (in shares) 49,277us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber 49,277us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber 89,877us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Shares available for grant 266,309us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant 266,309us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant 229,209us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Weighted Average Exercise Price      
Outstanding-beginning of year (in dollars per share) $ 10.47us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 10.58us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice  
Expired/Terminated (in dollars per share)   $ 10.71us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice $ 7.74us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
Outstanding-end of year (in dollars per share) $ 10.47us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 10.47us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 10.58us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Options exercisable at year-end (in dollars per share) $ 10.47us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice $ 10.47us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice $ 10.58us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
Additional information      
Outstanding, Weighted Average Remaining Contractual Life 3 years 2 months 5 days 3 years 11 months 19 days  
Options exercisable at year-end, Weighted Average Remaining Contractual Life 2 years 2 months 5 days 3 years 2 months 5 days  
Outstanding-end of year, Aggregate Intrinsic Value $ 5,775us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue    
Options exercisable at year-end, Aggregate Intrinsic Value 5,775us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1    
Additional information      
Total compensation cost recognized   $ 0us-gaap_AllocatedShareBasedCompensationExpense $ 0us-gaap_AllocatedShareBasedCompensationExpense
Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Term of the stock incentive option 10 years    
Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of outstanding common stock owned by a participant 10.00%czbs_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfCommonStockPerParticipant
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Participant With More Than 10 Percent Ownership Interest [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Term of the stock incentive option 5 years    
Participant With More Than 10 Percent Ownership Interest [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Purchase price as a percentage of the fair market value of common stock 110.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_TitleOfIndividualAxis
= czbs_ParticipantWithMoreThan10PercentOwnershipInterestMember