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14. SUBSEQUENT EVENTS (Additional Information) (Details) - Subsequent Event [Member] $ in Millions	Oct. 31, 2024 USD ($)
Subsequent Event [Line Items]
Aggregate Sale Price of Buildings	$ 30.0
Combined pre-tax net gain	$ 16.8

X

- Definition

Aggregate Sale Price of Buildings

+ References

No definition available.

+ Details

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

X

- Definition

The gain (loss) is the pre-tax difference between the net condemnation award and the entity's adjusted basis of the condemned property.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

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Balance Type:	na
Period Type:	duration

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- Details

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Namespace Prefix:
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Balance Type:
Period Type: