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Summary of Significant Accounting Policies (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Significant Accounting Policies [Line Items]      
Transfer of securities from available-for-sale to held-to-maturity $ 31,346cvcy_AvailableforsaleSecuritiesTransferstoHeldtomaturity $ 0cvcy_AvailableforsaleSecuritiesTransferstoHeldtomaturity $ 0cvcy_AvailableforsaleSecuritiesTransferstoHeldtomaturity
Real Estate - owner-occupied percentage minimum for collateral 50.00%cvcy_CommercialRealEstateOwnerOccupiedPercentageForCollateral    
Tax benefit from exercise of stock options 7us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities 17us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities 26us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Amortization expense, intangible asset $ 337us-gaap_AmortizationOfIntangibleAssets $ 268us-gaap_AmortizationOfIntangibleAssets $ 200us-gaap_AmortizationOfIntangibleAssets
Minimum | Core deposits      
Significant Accounting Policies [Line Items]      
Estimated useful life of intangible asset 7 years    
Maximum | Core deposits      
Significant Accounting Policies [Line Items]      
Estimated useful life of intangible asset 10 years    
Premises | Minimum      
Significant Accounting Policies [Line Items]      
Estimated useful lives of premises and equipment 20 years    
Premises | Maximum      
Significant Accounting Policies [Line Items]      
Estimated useful lives of premises and equipment 40 years    
Leasehold improvements, furniture, fixtures and equipment | Minimum      
Significant Accounting Policies [Line Items]      
Estimated useful lives of premises and equipment 3 years    
Leasehold improvements, furniture, fixtures and equipment | Maximum      
Significant Accounting Policies [Line Items]      
Estimated useful lives of premises and equipment 10 years