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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 | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Performing TDRs [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Beginning balance | $ 66,955 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember | $ 50,392 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember
New modifications | 462 cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringAdditions / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember | 30,796 cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringAdditions / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember
Payoffs and payments, net | (14,527)cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringPayments / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember | (15,492)cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringPayments / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember
TDRs returned to accrual status | 699 cvbf_FinancingReceivableRecordedInvestmentTroubledDebtRestructuringsAccrualStatus / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember | 1,259 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 | 53,589 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember | 66,955 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_PerformingTroubledDebtRestructuringMember
Nonperforming TDRs [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Beginning balance | 25,119 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember | 31,309 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember
New modifications | 4,372 cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringAdditions / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember | 4,187 cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringAdditions / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember
Charge-offs | (1,061)us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember | (92)us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember
Payoffs and payments, net | (7,446)cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringPayments / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember | (9,026)cvbf_FinancingReceivablesImpairedTroubledDebtRestructuringPayments / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember
TDRs returned to accrual status | (699)cvbf_FinancingReceivableRecordedInvestmentTroubledDebtRestructuringsAccrualStatus / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember | (1,259)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 | $ 20,285 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancialInstrumentAxis = cvbf_NonPerformingTroubledDebtRestructuredLoansMember | $ 25,119 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

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- 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

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- 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
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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
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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: |