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Investment Securities - Textual (Details) (USD $) | 12 Months Ended
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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 | $ 31,346,000 cvcy_AvailableforsaleSecuritiesTransferstoHeldtomaturity | $ 0 cvcy_AvailableforsaleSecuritiesTransferstoHeldtomaturity | $ 0 cvcy_AvailableforsaleSecuritiesTransferstoHeldtomaturity
Available-for-sale Securities, Transferred to Held-to-maturity Securities, Fair Value | 31,509,000 cvcy_AvailableforsaleSecuritiesTransferredtoHeldtomaturitySecuritiesFairValue |  |
Unrealized gain on transfer of securities from available-for-sale to held-to-maturity | 163,000 cvcy_AvailableforsaleSecuritiesTransferredtoHeldtomaturitySecuritiesUnrealizedGainLoss | 0 cvcy_AvailableforsaleSecuritiesTransferredtoHeldtomaturitySecuritiesUnrealizedGainLoss | 0 cvcy_AvailableforsaleSecuritiesTransferredtoHeldtomaturitySecuritiesUnrealizedGainLoss
Other than Temporary Impairment Losses, Investments, Accretion of Noncredit Portion, Available-for-sale Securities Transferred to Held-to-maturity Securities, before Tax | 21,000 cvcy_OtherthanTemporaryImpairmentLossesInvestmentsAccretionofNoncreditPortionAvailableforsaleSecuritiesTransferredtoHeldtomaturitySecuritiesbeforeTax |  |
Available-for-sale Securities, Gross Unrealized Gain (Loss) | 8,896,000 us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGainLoss1 | (3,884,000)us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGainLoss1 |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax | 372,000 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax | 521,000 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax | 674,000 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
Accumulated Other Comprehensive Income Available For Sale Securities Adjustment Tax | 3,661,000 cvcy_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 | 10,000 cvcy_ThresholdAmountOfValueDeclineInAvailableForSaleSecuritiesToBeConsideredOtherThanTemporaryImpairment |  |
OTTI charge | 0 us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment | 17,000 us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment |
Available-for-sale investment securities, Amortized cost | 423,639,000 us-gaap_AvailableForSaleSecuritiesAmortizedCost | 447,108,000 us-gaap_AvailableForSaleSecuritiesAmortizedCost |
Available-for-sale Securities Pledged as Collateral | 100,747,000 us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral | 99,209,000 us-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 | 142,000 cvcy_OtherthanTemporaryImpairmentLossesInvestmentsPortioninOtherComprehensiveLossbeforeTaxIncludingPortionAttributabletoNoncontrollingInterestAFSTransferredtoHTMSecurities |  |
Securities Pledged as Collateral |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale investment securities, Amortized cost | 96,490,000 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_InvestmentTypeAxis = us-gaap_SecuritiesPledgedAsCollateralMember | 98,701,000 us-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 | 10 cvcy_AvailableForSaleSecuritiesNumberOfPositions / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |  |
Debt Securities, Amortized Cost | 33,088,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember | 18,172,000 us-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 | 2 us-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 | 1 us-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 | 148 cvcy_AvailableForSaleSecuritiesNumberOfPositions / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember |  |
Debt Securities, Amortized Cost | 143,343,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember | 162,018,000 us-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 | 8 us-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 | 10 us-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 | 203 cvcy_AvailableForSaleSecuritiesNumberOfPositions / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember |  |
Debt Securities, Amortized Cost | 236,629,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember | 254,978,000 us-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 | 32 us-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 | 15 us-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) | 1,614,000 us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGainLoss1 / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember |  |
Available-for-sale Securities, Number of Positions | 20 cvcy_AvailableForSaleSecuritiesNumberOfPositions / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember |  |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions | 0 us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember |  |
Debt Securities, Amortized Cost | 3,079,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember | 4,344,000 us-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 | 10 cvcy_AvailableForSaleSecuritiesNumberOfPositions / us-gaap_ExternalCreditRatingByGroupingAxis = us-gaap_ExternalCreditRatingNonInvestmentGradeMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember |  |
Debt Securities, Amortized Cost | $ 2,614,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_ExternalCreditRatingByGroupingAxis = us-gaap_ExternalCreditRatingNonInvestmentGradeMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember |  |

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