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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 | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Description of Assets |  |
Investment securities-HTM |  | $ (656)
Covered loans held-for-sale |  | (250)
Impaired loans- non-covered | (3,930) | (6,707)
OREO- non-covered | (336) | (523)
OREO- covered | (467) | (2,192)
Level 1 [Member] |  |
Description of Assets |  |
Investment securities-HTM |  |
Covered loans held-for-sale |  |
Impaired loans- non-covered |  |
OREO- non-covered |  |
OREO- covered |  |
Level 2 [Member] |  |
Description of Assets |  |
Investment securities-HTM |  |
Covered loans held-for-sale |  |
Impaired loans- non-covered |  |
OREO- non-covered |  |
OREO- covered |  |
Level 3 [Member] |  |
Description of Assets |  |
Investment securities-HTM |  | 2,383
Covered loans held-for-sale |  | 1,404
Impaired loans- non-covered | 12,460 | 30,014
OREO- non-covered | 3,008 | 4,866
OREO- covered | 1,067 | 2,541
Carrying Value [Member] |  |
Description of Assets |  |
Investment securities-HTM |  | 2,383
Covered loans held-for-sale |  | 1,404
Impaired loans- non-covered | 12,460 | 30,014
OREO- non-covered | 3,008 | 4,866
OREO- covered | $ 1,067 | $ 2,541

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- 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

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- Definition Loss on impaired loans. + References No definition available. + Details
Name: | cvbf_LossOnImpairedLoans
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Other real estate owned 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

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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

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- Details
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Balance Type: | na
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investments in debt securities which are categorized as held-to-maturity and that have scheduled maturities more than one year from the balance sheet date or operating cycle, if longer; such investments are normally measured at amortized cost (carrying value) unless circumstances indicate that the value to be recovered from the investment is less than its carried amount. The held-to-maturity category is for those securities that the Company has the positive intent and ability to hold until maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 33 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 7-11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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Period Type: | instant