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Summary of Significant Accounting Policies - Summary of Useful Lives of Principal Classes of Assets (Detail) | 12 Months Ended
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Dec. 31, 2012
Properties under capital lease and leasehold improvements amortizable description | Shorter of estimated economic lives of 15 years or term of the lease.
Properties under capital lease and leasehold estimated economic lives under option one | 15 years
Minimum [Member] | Bank premises [Member] |
Estimated lives | 15 years
Minimum [Member] | Computer equipment [Member] |
Estimated lives | 3 years
Minimum [Member] | Furniture, fixtures and equipment [Member] |
Estimated lives | 5 years
Maximum [Member] | Bank premises [Member] |
Estimated lives | 40 years
Maximum [Member] | Computer equipment [Member] |
Estimated lives | 5 years
Maximum [Member] | Furniture, fixtures and equipment [Member] |
Estimated lives | 7 years

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- Definition Properties under capital lease and leasehold estimated economic lives under option one. + References No definition available. + Details
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Namespace Prefix: | cvbf_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Properties under capital lease and leasehold improvements amortizable description. + References No definition available. + Details
Name: | cvbf_PropertiesUnderCapitalLeaseAndLeaseholdImprovementsAmortizableDescription
Namespace Prefix: | cvbf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration