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Business Segments - Additional Information (Detail) | 9 Months Ended
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Sep. 30, 2015 FinancialCenters Segment
Segment Reporting [Abstract] |
Number of principal reporting segments | Segment | 2
Bank operated Business Financial Centers, number | 40
Bank operated Commercial Banking Centers, number | 7
Consideration of Business Financial and Commercial Banking Centers | Segment | 1

X
- 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

X
- 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
- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration