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Other Real Estate Owned - Summary of Activity Related to Total OREO (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]
Balance, beginning of period	$ 4,527	$ 6,993
Additions	0	0
Dispositions	0	(2,129)
Valuation adjustments	0	(337)
Balance, end of period	$ 4,527	$ 4,527

X

- Definition

The acquisition of other real estate owned through foreclosure, representing an increase the balance of other real estate owned during the period.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Definition

The carrying amount of other real estate owned sold during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	cvbf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Changes in valuation adjustments associated with other real estate owned occurring during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	cvbf_
Data Type:	xbrli:monetaryItemType
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X

- Definition

Carrying amount as of the balance sheet date of other real estate and foreclosed assets. Other real estate may include real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. Foreclosed assets include all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.10(4))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Period Type:	instant

X

- References

No definition available.

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