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401(K) and Profit-Sharing Plan - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Employer contribution in profit sharing plan, percentage	3.00%
Employer contribution in profit sharing plan	$ 2.4	$ 2.7	$ 1.5

X

- Definition

Employer contribution in profit sharing plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	cvbf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Percentage of defined benefit plan contributions by employer.

+ References

No definition available.

+ Details

Name:	cvbf_PercentageOfDefinedBenefitPlanContributionsByEmployer
Namespace Prefix:	cvbf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

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