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Business Segments - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2012 FinancialCenters
Operating Statistics [Line Items] |
Number of principal reporting segment | 2
Bank operated Business Financial Centers, number | 41
Bank operated Commercial Banking Centers, number | 5
Consideration of Business Financial and Commercial Banking Center | 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
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Namespace Prefix: | cvbf_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of principal reporting segment. + References No definition available. + Details
Name: | cvbf_NumberOfPrincipalReportingSegment
Namespace Prefix: | cvbf_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | cvbf_OperatingStatisticsLineItems
Namespace Prefix: | cvbf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration