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Business - Additional Information (Detail) | Dec. 31, 2012 FinancialCenters Subsidiary
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Schedule Of Description Of Company [Line Items] |
Number of inactive subsidiaries | 3
Bank operated Business Financial Centers, number | 41
Bank operated Commercial Banking Centers, number | 5
Bank operated trust office, number | 3

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

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- 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 Bank operated wealth management offices, number. + References No definition available. + Details
Name: | cvbf_BankOperatedWealthManagementOfficesNumber
Namespace Prefix: | cvbf_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of inactive subsidiaries. + References No definition available. + Details
Name: | cvbf_NumberOfInactiveSubsidiaries
Namespace Prefix: | cvbf_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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