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Loans and Lease Finance Receivables and Allowance for Loan Losses - Summary of Activity Related to Loans Held-for-Sale (Detail) (Loans Held-for-Sale [Member], USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Loans Held-for-Sale [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Balance, beginning of period | $ 3,667 us-gaap_LoansHeldForSaleOther / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember | $ 0 us-gaap_LoansHeldForSaleOther / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember
Originations of mortgage loans | 0 cvbf_OriginationsOfMortgageLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember | 485 cvbf_OriginationsOfMortgageLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember
Sales of mortgage loans | 0 us-gaap_MortgageLoansOnRealEstateCostOfMortgagesSold / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember | (485)us-gaap_MortgageLoansOnRealEstateCostOfMortgagesSold / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember
Transfer of mortgage loans to held for investment | 0 cvbf_TransferOfMortgageLoansToHeldForInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember | 0 cvbf_TransferOfMortgageLoansToHeldForInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember
Sales of other loans | (3,667)cvbf_SalesOfOtherLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember | 0 cvbf_SalesOfOtherLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember
Transfers of other loans to held-for-sale | 0 cvbf_TransfersOfLoansToHeldForSale / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember | 3,667 cvbf_TransfersOfLoansToHeldForSale / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember
Write-down of loans held-for-sale | 0 cvbf_WriteDownOfLoansHeldForSale / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember | 0 cvbf_WriteDownOfLoansHeldForSale / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember
Balance, end of period | $ 0 us-gaap_LoansHeldForSaleOther / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember | $ 3,667 us-gaap_LoansHeldForSaleOther / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansHeldForSaleMember

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- Definition Cash outflow associated with the origination of mortgage loans. + References No definition available. + Details
Name: | cvbf_OriginationsOfMortgageLoans
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Sales of other loans. + References No definition available. + Details
Name: | cvbf_SalesOfOtherLoans
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Transfer of mortgage loans to held for investment. + References No definition available. + Details
Name: | cvbf_TransferOfMortgageLoansToHeldForInvestment
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Transfers of loans to held for sale. + References No definition available. + Details
Name: | cvbf_TransfersOfLoansToHeldForSale
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Write down of loans held for sale. + References No definition available. + Details
Name: | cvbf_WriteDownOfLoansHeldForSale
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount classified as other loans attributable to disposal group held for sale or disposed of. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(a)(7)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_LoansHeldForSaleOther
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The carrying amount of mortgage loans on real estate that were sold during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 29 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule IV -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29.6) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
Name: | us-gaap_MortgageLoansOnRealEstateCostOfMortgagesSold
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration