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Investments - Textual (Details) (USD $) | 3 Months Ended | 12 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Schedule of Available-for-sale Securities |  |  |
Available-for-sale Securities Pledged as Collateral | $ 109,341,000 us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral |  |
Available-for-sale Securities, Gross Unrealized Gain (Loss) | 10,554,000 us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGainLoss1 | 8,896,000 us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGainLoss1 |
Income tax impact from the reclassification of unrealized net gains on available-for-sale securities to realized net gains on available-for-sale securities | 299,000 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax | 110,000 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax |
Transfer of securities from available-for-sale to held-to-maturity | 0 cvcy_AvailableforsaleSecuritiesTransferstoHeldtomaturity | 31,346,000 cvcy_AvailableforsaleSecuritiesTransferstoHeldtomaturity | 31,346,000 cvcy_AvailableforsaleSecuritiesTransferstoHeldtomaturity
Fair value of held-to-maturity investment securities transferred |  |  | 32,047,000 cvcy_AvailableforsaleSecuritiesTransferstoHeldtomaturityFairValue
Unrealized gain on transfer of securities from available-for-sale to held-to-maturity | 0 cvcy_AvailableforsaleSecuritiesTransferredtoHeldtomaturitySecuritiesUnrealizedGainLoss | 163,000 cvcy_AvailableforsaleSecuritiesTransferredtoHeldtomaturitySecuritiesUnrealizedGainLoss | 163,000 cvcy_AvailableforsaleSecuritiesTransferredtoHeldtomaturitySecuritiesUnrealizedGainLoss
AOCI available-for-sale securities adjustment tax | 4,343,000 cvcy_AccumulatedOtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentTax |  | 3,661,000 cvcy_AccumulatedOtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentTax
Unaccreted balance | 141,000 cvcy_AccumulatedOtherComprehensiveIncomeLossAvailableforSaleSecuritiesTransferredtoHeldtoMaturityUnaccretedBalance |  | 142,000 cvcy_AccumulatedOtherComprehensiveIncomeLossAvailableforSaleSecuritiesTransferredtoHeldtoMaturityUnaccretedBalance
U.S. Government agencies |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale Securities, Number of Positions | 14 cvcy_AvailableForSaleSecuritiesNumberOfPositions / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |  |
Debt Securities, Amortized Cost | 50,661,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |  | 33,088,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / 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 | 151 cvcy_AvailableForSaleSecuritiesNumberOfPositions / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember |  |
Debt Securities, Amortized Cost | 145,696,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember |  | 143,343,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / 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 | 182 cvcy_AvailableForSaleSecuritiesNumberOfPositions / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember |  |
Debt Securities, Amortized Cost | 210,617,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember |  | 236,629,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / 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) | 1,693,000 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 | 2,783,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember |  | 3,079,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Other equity securities |  |  |
Schedule of Available-for-sale Securities |  |  |
Available For Sale Securities, Number of Securities | 1 cvcy_AvailableForSaleSecuritiesNumberofSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_EquitySecuritiesMember |  |
Available-for-sale Equity Securities, Amortized Cost Basis | 7,500,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_EquitySecuritiesMember |  | 7,500,000 us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_EquitySecuritiesMember
Less than 12 months | U.S. Government agencies |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions | 6 us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 / cvcy_DurationOfLossAxis = cvcy_LessThanTwelveMonthsMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |  |
Less than 12 months | Obligations of states and political subdivisions |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions | 7 us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 / cvcy_DurationOfLossAxis = cvcy_LessThanTwelveMonthsMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember |  |
Less than 12 months | U.S. Government agencies collateralized by residential mortgage obligations |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions | 24 us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 / cvcy_DurationOfLossAxis = cvcy_LessThanTwelveMonthsMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember |  |
Greater than 12 months | U.S. Government agencies |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions | 0 us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 / cvcy_DurationOfLossAxis = cvcy_GreaterThanTwelveMonthsMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |  |
Greater than 12 months | Obligations of states and political subdivisions |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions | 4 us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 / cvcy_DurationOfLossAxis = cvcy_GreaterThanTwelveMonthsMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember |  |
Greater than 12 months | U.S. Government agencies collateralized by residential mortgage obligations |  |  |
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_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember |  |
Below investment grade | Private label residential mortgage backed securities |  |  |
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 | $ 2,346,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_ExternalCreditRatingByGroupingAxis = us-gaap_ExternalCreditRatingNonInvestmentGradeMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember |  |

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- Definition This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
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