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Acquired SJB Assets and FDIC Loss Sharing (Liability) Asset - Summary of Activity Related to FDIC Loss Sharing Asset (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
FDIC Indemnification Asset [Roll Forward] |  |
Balance, beginning of period | $ 299 | $ 4,764
FDIC share of additional losses, net of recoveries | (902) | 342
Cash paid to FDIC, net | 1,089 | 1,134
Net amortization | 0 | (3,932)
Other reductions, net | (715) | (2,009)
Balance, end of period | $ (229) | $ 299

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- Definition FDIC indemnification asset and liability. + References No definition available. + Details
Name: | cvbf_FdicIndemnificationAssetAndLiability
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition FDIC Share of Additional Losses Increases Decreases Net + References No definition available. + Details
Name: | cvbf_FdicShareOfAdditionalLossesIncreasesDecreasesNet
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Net other reductions in FDIC loss sharing asset during the period. + 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 Amount of decreases to the indemnification asset due to cash payments received relating to loss sharing agreements with the Federal Deposit Insurance Corporation (FDIC). + References No definition available. + Details
Name: | us-gaap_FDICIndemnificationAssetCashPaymentsReceived
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of decreases to the indemnification asset due to write offs of loans, net of recoveries, relating to loss sharing agreements with the Federal Deposit Insurance Corporation (FDIC). + References No definition available. + Details
Name: | us-gaap_FDICIndemnificationAssetNetWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_FDICIndemnificationAssetRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration