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Business - Additional Information (Detail) | Sep. 30, 2020 Location Loan Subsidiary
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Schedule Of Description Of Company [Line Items] |
Number of inactive subsidiaries | Subsidiary | 1
Bank operated banking centers | 57
Bank operated trust office locations, number | 3
Number of loan production office | Loan | 1

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- Definition Bank operated banking centers number. + References No definition available. + Details
Name: | cvbf_BankOperatedBankingCentersNumber
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

X
- Definition Number of loan production office. + References No definition available. + Details
Name: | cvbf_NumberOfLoanProductionOffice
Namespace Prefix: | cvbf_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Schedule Of Description Of Company [Line Items] + References No definition available. + Details
Name: | cvbf_ScheduleOfDescriptionOfCompanyLineItems
Namespace Prefix: | cvbf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration