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Loan and Lease Finance Receivables and Allowance for Credit Losses (Details Textual 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Allowance for Credit Losses and Loans & Lease Real Estate Owned (Non-Covered Loans) (Textual) [Abstract]
Provision for unfunded commitments	$ 0	$ 732
Interest income, Recognized	583		2,225
Number of days after which interest on loan is discontinued	90 days
Nonperforming Financing Receivable [Member]
Allowance for Credit Losses and Loans & Lease Real Estate Owned (Non-Covered Loans) (Textual) [Abstract]
Interest income, Recognized	$ 594,000	$ 831,000

X

- Details

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Namespace Prefix:	cvbf_
Data Type:	xbrli:stringItemType
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X

- Definition

Number of days after which interest on loan is discontinued.

+ References

No definition available.

+ Details

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Namespace Prefix:	cvbf_
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- Definition

Provision for unfunded commitments.

+ References

No definition available.

+ Details

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

X

- Definition

The interest income recognized during the time within that period that the financing receivables were impaired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5212-111524

-Subparagraph (c)(2)

+ Details

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