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Fair Value Information - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Description of assets |  |
Impaired loans-non-covered | $ 3,936 | $ 3,930
OREO-non-covered |  | 336
OREO-covered | 14 | 467
Total assets | 3,950 | 4,733
Level 1 [Member] |  |
Description of assets |  |
Impaired loans-non-covered |  |
OREO-non-covered |  |
OREO-covered |  |
Total assets |  |
Level 2 [Member] |  |
Description of assets |  |
Impaired loans-non-covered |  |
OREO-non-covered |  |
OREO-covered |  |
Total assets |  |
Level 3 [Member] |  |
Description of assets |  |
Impaired loans-non-covered | 6,820 | 12,460
OREO-non-covered |  | 3,008
OREO-covered | 55 | 1,067
Total assets | 6,875 | 16,535
Carrying Value [Member] |  |
Description of assets |  |
Impaired loans-non-covered | 6,820 | 12,460
OREO-non-covered |  | 3,008
OREO-covered | 55 | 1,067
Total assets | $ 6,875 | $ 16,535

X
- Definition Impaired loan non-covered fair value disclosure. + References No definition available. + Details
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Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Other real estate owned covered fair value disclosure. + References No definition available. + Details
Name: | cvbf_OtherRealEstateOwnedCoveredFairValueDisclosure
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Other real estate owned non-covered fair value disclosure. + References No definition available. + Details
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Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureNonrecurring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration