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Acquired SJB Assets and FDIC Loss Sharing Asset - Additional Information (Detail) (USD $)
 0 Months Ended 3 Months Ended
Oct. 16, 2009
Mar. 31, 2015
Dec. 31, 2014
Business Combinations [Abstract]      
Acquisition date   Oct. 16, 2009  
After-tax gain included in earnings due to purchase method $ 12,300,000cvbf_GainOnFederalDepositInsuranceCorporationAssistedAcquisition    
Remaining discount associated with SJB loans   6,600,000cvbf_RemainingDiscountAssociatedWithLoansAcquired  
Expected cash flows   4,400,000cvbf_DiscountExpectedToAccreteIntoInterestIncome  
Remaining average lives of respective pools loans   3 years 8 months 12 days  
Remaining average lives of respective individual loans   9 months 18 days  
Allowance for PCI loans losses   $ 0cvbf_AllowanceForLoanLossesPurchasedCreditImpairedLoans $ 0cvbf_AllowanceForLoanLossesPurchasedCreditImpairedLoans