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Investment Securities - Textual (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Schedule of Available-for-sale Securities      
Transfer of securities from available-for-sale to held-to-maturity $ 31,346,000cvcy_AvailableforsaleSecuritiesTransferstoHeldtomaturity $ 0cvcy_AvailableforsaleSecuritiesTransferstoHeldtomaturity $ 0cvcy_AvailableforsaleSecuritiesTransferstoHeldtomaturity
Available-for-sale Securities, Transferred to Held-to-maturity Securities, Fair Value 31,509,000cvcy_AvailableforsaleSecuritiesTransferredtoHeldtomaturitySecuritiesFairValue    
Unrealized gain on transfer of securities from available-for-sale to held-to-maturity 163,000cvcy_AvailableforsaleSecuritiesTransferredtoHeldtomaturitySecuritiesUnrealizedGainLoss 0cvcy_AvailableforsaleSecuritiesTransferredtoHeldtomaturitySecuritiesUnrealizedGainLoss 0cvcy_AvailableforsaleSecuritiesTransferredtoHeldtomaturitySecuritiesUnrealizedGainLoss
Other than Temporary Impairment Losses, Investments, Accretion of Noncredit Portion, Available-for-sale Securities Transferred to Held-to-maturity Securities, before Tax 21,000cvcy_OtherthanTemporaryImpairmentLossesInvestmentsAccretionofNoncreditPortionAvailableforsaleSecuritiesTransferredtoHeldtomaturitySecuritiesbeforeTax    
Available-for-sale Securities, Gross Unrealized Gain (Loss) 8,896,000us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGainLoss1 (3,884,000)us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGainLoss1  
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax 372,000us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax 521,000us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax 674,000us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
Accumulated Other Comprehensive Income Available For Sale Securities Adjustment Tax 3,661,000cvcy_AccumulatedOtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentTax (1,598,000)cvcy_AccumulatedOtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentTax  
Threshold Period of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment 12 months    
Threshold Percentage of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment 10.00%cvcy_ThresholdPercentageOfValueDeclineInAvailableForSaleSecuritiesToBeConsideredOtherThanTemporaryImpairment    
Threshold Amount of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment 10,000cvcy_ThresholdAmountOfValueDeclineInAvailableForSaleSecuritiesToBeConsideredOtherThanTemporaryImpairment    
OTTI charge 0us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment 17,000us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment  
Available-for-sale investment securities, Amortized cost 423,639,000us-gaap_AvailableForSaleSecuritiesAmortizedCost 447,108,000us-gaap_AvailableForSaleSecuritiesAmortizedCost  
Available-for-sale Securities Pledged as Collateral 100,747,000us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral 99,209,000us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral  
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, before Tax, Including Portion Attributable to Noncontrolling Interest, AFS Transferred to HTM Securities 142,000cvcy_OtherthanTemporaryImpairmentLossesInvestmentsPortioninOtherComprehensiveLossbeforeTaxIncludingPortionAttributabletoNoncontrollingInterestAFSTransferredtoHTMSecurities    
Securities Pledged as Collateral      
Schedule of Available-for-sale Securities      
Available-for-sale investment securities, Amortized cost 96,490,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_SecuritiesPledgedAsCollateralMember
98,701,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_SecuritiesPledgedAsCollateralMember
 
U.S. Government agencies      
Schedule of Available-for-sale Securities      
Available-for-sale Securities, Number of Positions 10cvcy_AvailableForSaleSecuritiesNumberOfPositions
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
   
Debt Securities, Amortized Cost 33,088,000us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
18,172,000us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
 
U.S. Government agencies | Less than 12 months      
Schedule of Available-for-sale Securities      
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions 2us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1
/ cvcy_DurationOfLossAxis
= cvcy_LessThanTwelveMonthsMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
   
U.S. Government agencies | Greater than 12 months      
Schedule of Available-for-sale Securities      
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions 1us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1
/ cvcy_DurationOfLossAxis
= cvcy_GreaterThanTwelveMonthsMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
   
Obligations of states and political subdivisions      
Schedule of Available-for-sale Securities      
Available-for-sale Securities, Number of Positions 148cvcy_AvailableForSaleSecuritiesNumberOfPositions
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
   
Debt Securities, Amortized Cost 143,343,000us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
162,018,000us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
 
Obligations of states and political subdivisions | Less than 12 months      
Schedule of Available-for-sale Securities      
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions 8us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1
/ cvcy_DurationOfLossAxis
= cvcy_LessThanTwelveMonthsMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
   
Obligations of states and political subdivisions | Greater than 12 months      
Schedule of Available-for-sale Securities      
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions 10us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1
/ cvcy_DurationOfLossAxis
= cvcy_GreaterThanTwelveMonthsMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
   
U.S. Government agencies collateralized by residential mortgage obligations      
Schedule of Available-for-sale Securities      
Available-for-sale Securities, Number of Positions 203cvcy_AvailableForSaleSecuritiesNumberOfPositions
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
   
Debt Securities, Amortized Cost 236,629,000us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
254,978,000us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
 
U.S. Government agencies collateralized by residential mortgage obligations | Less than 12 months      
Schedule of Available-for-sale Securities      
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions 32us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1
/ cvcy_DurationOfLossAxis
= cvcy_LessThanTwelveMonthsMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
   
U.S. Government agencies collateralized by residential mortgage obligations | Greater than 12 months      
Schedule of Available-for-sale Securities      
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions 15us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1
/ cvcy_DurationOfLossAxis
= cvcy_GreaterThanTwelveMonthsMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
   
Private label residential mortgage backed securities      
Schedule of Available-for-sale Securities      
Available-for-sale Securities, Gross Unrealized Gain (Loss) 1,614,000us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGainLoss1
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
   
Available-for-sale Securities, Number of Positions 20cvcy_AvailableForSaleSecuritiesNumberOfPositions
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
   
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions 0us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
   
Debt Securities, Amortized Cost 3,079,000us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
4,344,000us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
 
Private label residential mortgage backed securities | External Credit Rating, Non Investment Grade [Member]      
Schedule of Available-for-sale Securities      
Available-for-sale Securities, Number of Positions 10cvcy_AvailableForSaleSecuritiesNumberOfPositions
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
   
Debt Securities, Amortized Cost $ 2,614,000us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember