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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) | 0 Months Ended | 3 Months Ended
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Oct. 16, 2009 | Mar. 31, 2014 Plans
Summary Of Significant Accounting Policies [Line Items] |  |
Number of days on which collection of interest on principal is no longer probable |  | 90 days
Period over which borrower has to demonstrate repayment performance in compliance with restructured terms to take loan out of nonaccrual status |  | 6 months
Original terms of modified loans |  | 6 months
Number of days on which charge-offs unsecured consumer loans are recorded |  | 120 days
Minimum loan amount for credit review process |  | $ 1,000,000
Agreed percentage of losses in loss sharing agreement | 80.00% |
Loss amount with respect to covered assets | 26,700,000 |
Agreed percentage of reimbursement in loss sharing agreement | 95.00% |
Goodwill impairment |  | 0
Number of stock-based employee compensation plans |  | 3
Commercial loans [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Loss sharing agreement term | 5 years |
Loss recovery provisions term | 8 years |
Single-family residential loans [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Loss sharing agreement term | 10 years |
Loss recovery provisions term | 10 years |
Minimum [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Number of days over which principal or interest payments are past due to consider non-covered loans |  | 30 days
Number of days for which principal or interest payments on non-covered loans remain accrual |  | 30 days
Length of modified debt term |  | 3 months
Maximum [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Number of days for which principal or interest payments on non-covered loans remain accrual |  | 89 days
Length of modified debt term |  | 12 months
Loss recoveries on covered assets | $ 144,000,000 |

X
- Definition Pursuant to loss sharing agreement, losses incurred prior to losses covered by FDIC in loss sharing agreement. + References No definition available. + Details
Name: | cvbf_FirstLossAmountCoveredAssets
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Loss recovery provision term. + References No definition available. + Details
Name: | cvbf_LossRecoveryProvisionTerm
Namespace Prefix: | cvbf_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss sharing agreement term. + References No definition available. + Details
Name: | cvbf_LossSharingAgreementTerm
Namespace Prefix: | cvbf_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum threshold for loans that are subject to an annual credit review process, where all aspects of the loan, including the borrower and guarantor(s) undergo review. This review process may result in changes to the internal credit risk rating of the loan. + References No definition available. + Details
Name: | cvbf_MinimumLoanAmountForAnnualCreditReviewProcess
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of days for which principal or interest payment on Non covered loans remain accrual. + References No definition available. + Details
Name: | cvbf_NumberOfDaysForWhichPrincipalOrInterestPaymentOnNonCoveredLoansRemainAccrual
Namespace Prefix: | cvbf_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of days on which charge offs unsecured consumer loan are recorded. + References No definition available. + Details
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Namespace Prefix: | cvbf_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of days on which collection of interest on principal is no longer probable. + References No definition available. + Details
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Namespace Prefix: | cvbf_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of days over which principal or interest payment are past due to consider non-covered loans. + 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 Number of stock-based compensation plans. + References No definition available. + Details
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Period Type: | duration

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- Definition Original term of modified loans. + References No definition available. + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of losses reimbursed by the FDIC, and percentage of recoveries of prior losses shared with the FDIC up to threshold stated in loss sharing agreement with the FDIC. + References No definition available. + Details
Name: | cvbf_PercentageOfLossReimbursementAndRecoverySharingOne
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Data Type: | num:percentItemType
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Period Type: | instant

X
- Definition Percentage of losses reimbursed by the FDIC, and percentage of recoveries of prior losses shared with the FDIC over and above threshold stated in loss sharing agreement with the FDIC. + References No definition available. + Details
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Period Type: | duration

X
- Definition Period over which borrower has to demonstrate repayment performance in compliance with restructured terms to take loan out of nonaccrual status. + References No definition available. + Details
Name: | cvbf_PeriodOverWhichBorrowerHasToDemonstrateRepaymentPerformanceInComplianceWithRestructuredTermsToTakeLoanOutOfNonaccrualStatus
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Period Type: | duration

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- Definition Pursuant to loss sharing agreement, losses covered by FDIC. + References No definition available. + Details
Name: | cvbf_SecondLossAmountCoveredAssets
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
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- Definition Troubled debt restructuring modified term. + References No definition available. + Details
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X
- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. + References No definition available. + Details
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Period Type: | duration