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Income Taxes - Narrative (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Operating Loss Carryforwards [Line Items]    
Valuation allowance $ 20us-gaap_DeferredTaxAssetsValuationAllowance $ 108us-gaap_DeferredTaxAssetsValuationAllowance
Alternative minimum tax credit 3,338us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax 2,238us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax
Enterprise Zone Credits    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Amount 2,188us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_TaxCreditCarryforwardAxis
= cvcy_EnterpriseZoneCreditsMember
 
California    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 1,712us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= stpr_CA
 
California | Capital Loss Carryforward    
Operating Loss Carryforwards [Line Items]    
Valuation allowance (20)us-gaap_DeferredTaxAssetsValuationAllowance
/ us-gaap_IncomeTaxAuthorityAxis
= stpr_CA
/ us-gaap_TaxCreditCarryforwardAxis
= us-gaap_CapitalLossCarryforwardMember
(108)us-gaap_DeferredTaxAssetsValuationAllowance
/ us-gaap_IncomeTaxAuthorityAxis
= stpr_CA
/ us-gaap_TaxCreditCarryforwardAxis
= us-gaap_CapitalLossCarryforwardMember
Tax Credit Carryforward, Amount 282us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= stpr_CA
/ us-gaap_TaxCreditCarryforwardAxis
= us-gaap_CapitalLossCarryforwardMember
 
Federal    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards $ 1,694us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember