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Business Segments - Additional Information (Detail) | 3 Months Ended
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Mar. 31, 2015 Segment FinancialCenters
Segment Reporting Information [Line Items] |
Number of principal reporting segments | 2 us-gaap_NumberOfReportableSegments
Bank operated Business Financial Centers, number | 40 cvbf_BankOperatedBusinessFinancialCentersNumber
Bank operated Commercial Banking Centers, number | 7 cvbf_BankOperatedCommercialBankingCentersNumber
Consideration of Business Financial and Commercial Banking Centers | 1 cvbf_ConsiderationOfBusinessFinancialAndCommercialBankingCenter
Subsidiary bank [Member] |
Segment Reporting Information [Line Items] |
Bank operated Business Financial Centers, number | 40 cvbf_BankOperatedBusinessFinancialCentersNumber / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Bank operated Commercial Banking Centers, number | 7 cvbf_BankOperatedCommercialBankingCentersNumber / dei_LegalEntityAxis = us-gaap_SubsidiariesMember

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- Definition Bank operated business financial centers, number. + References No definition available. + Details
Name: | cvbf_BankOperatedBusinessFinancialCentersNumber
Namespace Prefix: | cvbf_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Bank operated commercial banking centers, number. + References No definition available. + Details
Name: | cvbf_BankOperatedCommercialBankingCentersNumber
Namespace Prefix: | cvbf_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Consideration of business financial and commercial banking center. + References No definition available. + Details
Name: | cvbf_ConsiderationOfBusinessFinancialAndCommercialBankingCenter
Namespace Prefix: | cvbf_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | dei_LegalEntityAxis=us-gaap_SubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |