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Loans and Lease Finance Receivables and Allowance for Loan Losses - Summary of Activity Related to Troubled Debt Restructurings (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Performing TDRs [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Beginning balance | $ 53,589 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember | $ 66,955 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember
New modifications | 0 cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringAdditions / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember | 41 cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringAdditions / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember
Payoffs and payments, net | (8,729)cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringPayments / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember | (602)cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringPayments / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember
TDRs returned to accrual status | 516 cvbf_FinancingReceivableRecordedInvestmentTroubledDebtRestructuringsAccrualStatus / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember | 0 cvbf_FinancingReceivableRecordedInvestmentTroubledDebtRestructuringsAccrualStatus / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember
TDRs placed on nonaccrual status | 0 cvbf_FinancingReceivableRecordedInvestmentTroubledDebtRestructuringsNonAccrualStatus / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember | 0 cvbf_FinancingReceivableRecordedInvestmentTroubledDebtRestructuringsNonAccrualStatus / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember
Ending balance | 45,376 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember | 66,394 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember
Nonperforming TDRs [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Beginning balance | 20,285 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember | 25,119 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember
New modifications | 0 cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringAdditions / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember | 0 cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringAdditions / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember
Charge-offs | 0 us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember | 0 us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember
Payoffs and payments, net | (2,995)cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringPayments / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember | (1,151)cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringPayments / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember
TDRs returned to accrual status | (516)cvbf_FinancingReceivableRecordedInvestmentTroubledDebtRestructuringsAccrualStatus / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember | 0 cvbf_FinancingReceivableRecordedInvestmentTroubledDebtRestructuringsAccrualStatus / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember
TDRs placed on nonaccrual status | 0 cvbf_FinancingReceivableRecordedInvestmentTroubledDebtRestructuringsNonAccrualStatus / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember | 0 cvbf_FinancingReceivableRecordedInvestmentTroubledDebtRestructuringsNonAccrualStatus / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember
Ending balance | $ 16,774 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember | $ 23,968 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember

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- Definition The increase in performing troubled debt restructurings financing receivables, because of returns to accrual status. + References No definition available. + Details
Name: | cvbf_FinancingReceivableRecordedInvestmentTroubledDebtRestructuringsAccrualStatus
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The decrease in performing troubled debt restructurings financing receivables, because of the change in accrual status to nonaccrual. + References No definition available. + Details
Name: | cvbf_FinancingReceivableRecordedInvestmentTroubledDebtRestructuringsNonAccrualStatus
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing Receivables Impaired Troubled Debt Restructuring Additions + References No definition available. + Details
Name: | cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringAdditions
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Financing Receivables Impaired Troubled Debt Restructuring Payments + References No definition available. + Details
Name: | cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringPayments
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
Name: | us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=cvbf_NonPerformingTroubledDebtRestructuredLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=cvbf_PerformingTroubledDebtRestructuringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |