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FDIC Loss Sharing Asset and Other Assets - Summary of Activity Related to FDIC Loss Sharing Asset (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Schedule Of Other Assets [Line Items] |  |
Balance, beginning of period | $ 59,453 | $ 101,461
FDIC share of additional losses, net of recoveries | 1,111 | 7,639
Cash received from FDIC | (18,974) | (42,179)
Net Accretion | (23,027) | (7,468)
Other reductions, net | (74) |
Balance, end of period | $ 18,489 | $ 59,453

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- Definition Accretion. + References No definition available. + Details
Name: | cvbf_Accretion
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- Definition FDIC loss sharing asset. + References No definition available. + Details
Name: | cvbf_FdicLossSharingAsset
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Net reductions. + References No definition available. + Details
Name: | cvbf_NetReductions
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Payments received from FDIC. + References No definition available. + Details
Name: | cvbf_PaymentsReceivedFromFdic
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Payments Received From Fdic Under Loss Share Agreements + References No definition available. + Details
Name: | cvbf_PaymentsReceivedFromFdicUnderLossShareAgreements
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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