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Junior Subordinated Deferrable Interest Debentures (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
quarter
Dec. 31, 2013
Dec. 31, 2012
Debt Instrument [Line Items]      
Percentage of Trust Preferred Securities eligible as Tier 1 capital 25.00%cvcy_AmountOfTrustPreferredSecuritiesEligibleAsTierOneCapitalMaximumPercentage    
Spread on LIBOR 1.60%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1    
Redemption period 90 days    
Percentage of notes outstanding required to call payment 25.00%cvcy_PercentageOfAggregatePrincipalAmountOfNotesOutstandingRequiredToCallNotes    
Number of consecutive quarterly periods of nonpayment required to call notes 20cvcy_NumberOfConsecutiveQuarterlyPeriodsOfNonpaymentRequiredToCallNotes    
Liquidation value per security 1,000cvcy_TrustPreferredSecuritiesLiquidationValuePerUnit    
Interest rate at period end 1.83%us-gaap_DebtInstrumentInterestRateAtPeriodEnd    
Interest expense for the period $ 96us-gaap_InterestExpenseTrustPreferredSecurities $ 98us-gaap_InterestExpenseTrustPreferredSecurities $ 107us-gaap_InterestExpenseTrustPreferredSecurities
Service 1st Bank      
Debt Instrument [Line Items]      
Aggregate Principal Amount Junior Subordinated Notes $ 5,155us-gaap_DebtInstrumentFaceAmount
/ dei_LegalEntityAxis
= cvcy_Service1StBankMember