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Loans and Lease Finance Receivables and Allowance for Loan Losses - Summary of Components of Loan and Lease Finance Receivables, Excluding PCI Loans (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, excluding PCI loans, net of deferred loan fees	$ 3,716,023us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome	$ 3,817,067us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Less: Allowance for loan losses	(60,709)us-gaap_LoansAndLeasesReceivableAllowance	(59,825)us-gaap_LoansAndLeasesReceivableAllowance
Total loans and lease finance receivables	3,655,314us-gaap_LoansAndLeasesReceivableNetReportedAmount	3,757,242us-gaap_LoansAndLeasesReceivableNetReportedAmount
Loans, Excluding PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	403,600us-gaap_LoansReceivableCommercialAndIndustrial / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	390,011us-gaap_LoansReceivableCommercialAndIndustrial / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
SBA	126,385us-gaap_LoansReceivableCommercialTradeFinancing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	134,265us-gaap_LoansReceivableCommercialTradeFinancing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
Commercial real estate	2,499,183us-gaap_LoansReceivableCommercialMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	2,487,803us-gaap_LoansReceivableCommercialMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
Construction	55,346cvbf_LoansReceivableConstruction / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	55,173cvbf_LoansReceivableConstruction / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
SFR mortgage	205,132us-gaap_LoansAndLeasesReceivableConsumerMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	205,124us-gaap_LoansAndLeasesReceivableConsumerMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
Dairy & livestock and agribusiness	173,441us-gaap_LoansReceivableCommercialFinancialAndAgricultural / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	279,173us-gaap_LoansReceivableCommercialFinancialAndAgricultural / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
Municipal lease finance receivables	76,220us-gaap_LoansAndLeasesReceivableCommercialGovernments / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	77,834us-gaap_LoansAndLeasesReceivableCommercialGovernments / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
Consumer and other loans	70,749us-gaap_LoansAndLeasesReceivableConsumerOther / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	69,884us-gaap_LoansAndLeasesReceivableConsumerOther / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
Gross loans, excluding PCI loans	3,610,056us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	3,699,267us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
Less: Deferred loan fees, net	(8,451)us-gaap_LoansAndLeasesReceivableDeferredIncome / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	(8,567)us-gaap_LoansAndLeasesReceivableDeferredIncome / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
Gross loans, excluding PCI loans, net of deferred loan fees	3,601,605us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	3,690,700us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
Less: Allowance for loan losses	(60,709)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	(59,825)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	(68,725)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	(75,235)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
Net PCI loans	3,540,896cvbf_LoansAndLeasesReceivableNetAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember	3,630,875cvbf_LoansAndLeasesReceivableNetAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	13,988us-gaap_LoansReceivableCommercialAndIndustrial / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember	14,605us-gaap_LoansReceivableCommercialAndIndustrial / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember
PCI Loans	121,030cvbf_GrossPurchasedCreditImpairedLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember	133,496cvbf_GrossPurchasedCreditImpairedLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember
SBA	1,073us-gaap_LoansReceivableCommercialTradeFinancing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember	1,110us-gaap_LoansReceivableCommercialTradeFinancing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember
Discount on PCI loans	(6,612)cvbf_DiscountOnPurchasedCreditImpairedLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember	(7,129)cvbf_DiscountOnPurchasedCreditImpairedLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember
Commercial real estate	102,445us-gaap_LoansReceivableCommercialMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember	109,350us-gaap_LoansReceivableCommercialMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember
Construction	0cvbf_LoansReceivableConstruction / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember	0cvbf_LoansReceivableConstruction / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember
SFR mortgage	197us-gaap_LoansAndLeasesReceivableConsumerMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember	205us-gaap_LoansAndLeasesReceivableConsumerMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember
Dairy & livestock and agribusiness	330us-gaap_LoansReceivableCommercialFinancialAndAgricultural / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember	4,890us-gaap_LoansReceivableCommercialFinancialAndAgricultural / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember
Municipal lease finance receivables	0us-gaap_LoansAndLeasesReceivableCommercialGovernments / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember	0us-gaap_LoansAndLeasesReceivableCommercialGovernments / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember
Consumer and other loans	2,997us-gaap_LoansAndLeasesReceivableConsumerOther / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember	3,336us-gaap_LoansAndLeasesReceivableConsumerOther / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember
Net PCI loans	$ 114,418cvbf_LoansAndLeasesReceivableNetAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember	$ 126,367cvbf_LoansAndLeasesReceivableNetAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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