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Non-Covered Loan and Lease Finance Receivables and Allowance for Loan Losses - Summary of Loan by Internal Risk Ratings (Parenthetical) (Detail) (Non-Covered Loans [Member], Doubtful & Loss [Member], USD $)	Sep. 30, 2014	Dec. 31, 2013
Non-Covered Loans [Member] | Doubtful & Loss [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as loss	$ 0	$ 0

X

- Definition

Loans Classified As Loss

+ References

No definition available.

+ Details

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

X

- Details

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