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Loans and Lease Finance Receivables and Allowance for Loan Losses - Schedule of Recorded Investment in, and Aging of, Past Due and Nonaccrual Loans, Excluding PCI Loans by Type of Loans (Parenthetical) (Detail) (USD $) | Mar. 31, 2015 | Dec. 31, 2014
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Receivables [Abstract] |  |
Nonaccruing loans, current | $ 20,300,000 cvbf_FinancingReceivableRecordedInvestmentCurrentNonaccrual | $ 20,100,000 cvbf_FinancingReceivableRecordedInvestmentCurrentNonaccrual
Nonaccruing loans, 30-59 days past due | 553,000 cvbf_FinancingReceivableRecordedInvestment30To59DaysPastDueNonaccrual | 3,700,000 cvbf_FinancingReceivableRecordedInvestment30To59DaysPastDueNonaccrual
Nonaccruing loans, 60-89 days past due | 86,000 cvbf_FinancingReceivables60To89DaysPastDueAndNotAccruing |
Nonaccruing loans, 90+ days past due | $ 2,000,000 us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue | $ 8,500,000 us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue

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- Definition Nonaccrual financing receivables that are less than 60 days past due but more than 29 days past due. + References No definition available. + Details
Name: | cvbf_FinancingReceivableRecordedInvestment30To59DaysPastDueNonaccrual
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Nonaccrual financing receivables that are current. + References No definition available. + Details
Name: | cvbf_FinancingReceivableRecordedInvestmentCurrentNonaccrual
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Financing Receivables 60 To 89 Days Past Due And Not Accruing + References No definition available. + Details
Name: | cvbf_FinancingReceivables60To89DaysPastDueAndNotAccruing
Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Financing receivables that are equal to or greater than 90 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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