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Business Segments - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2013 Segment FinancialCenters
Segment Reporting [Abstract]
Number of principal reporting segments	2
Bank operated Business Financial Centers, number	40
Bank operated Commercial Banking Centers, number	5
Consideration of Business Financial and Commercial Banking Center	1

X

- Definition

Bank operated business financial centers, number.

+ References

No definition available.

+ Details

Name:	cvbf_BankOperatedBusinessFinancialCentersNumber
Namespace Prefix:	cvbf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Bank operated commercial banking centers, number.

+ References

No definition available.

+ Details

Name:	cvbf_BankOperatedCommercialBankingCentersNumber
Namespace Prefix:	cvbf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Consideration of business financial and commercial banking center.

+ References

No definition available.

+ Details

Name:	cvbf_ConsiderationOfBusinessFinancialAndCommercialBankingCenter
Namespace Prefix:	cvbf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of principal reporting segment.

+ References

No definition available.

+ Details

Name:	cvbf_NumberOfPrincipalReportingSegment
Namespace Prefix:	cvbf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Details

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