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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
Receivables [Abstract]
Nonaccruing loans, current	$ 20,300,000cvbf_FinancingReceivableRecordedInvestmentCurrentNonaccrual	$ 20,100,000cvbf_FinancingReceivableRecordedInvestmentCurrentNonaccrual
Nonaccruing loans, 30-59 days past due	553,000cvbf_FinancingReceivableRecordedInvestment30To59DaysPastDueNonaccrual	3,700,000cvbf_FinancingReceivableRecordedInvestment30To59DaysPastDueNonaccrual
Nonaccruing loans, 60-89 days past due	86,000cvbf_FinancingReceivables60To89DaysPastDueAndNotAccruing
Nonaccruing loans, 90+ days past due	$ 2,000,000us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	$ 8,500,000us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue

X

- 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

X

- 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

X

- 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

X

- 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

X

- Details

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