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Non-Covered Loan 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		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Performing TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	$ 61,878	$ 61,566	$ 66,955	$ 50,392
New modifications			41	21,364
Payoffs and payments, net	(6,270)	(2,481)	(11,388)	(13,820)
TDRs returned to accrual status		110		1,259
TDRs placed on nonaccrual status
Ending balance	55,608	59,195	55,608	59,195
Nonperforming TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	27,397	26,497	25,119	31,309
New modifications		3,676	4,187	3,804
Charge-offs	(1,061)	(68)	(1,061)	(68)
Payoffs and payments, net	(3,730)	(1,950)	(5,639)	(5,741)
TDRs returned to accrual status		(110)		(1,259)
TDRs placed on nonaccrual status
Ending balance	$ 22,606	$ 28,045	$ 22,606	$ 28,045

X

- Definition

The increase in performing troubled debt restructurings financing receivables, because of returns to accrual status.

+ References

No definition available.

+ Details

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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

X

- 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

X

- 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