Regulatory Matters - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Regulated Operations [Abstract]
Trust-preferred securities included in Tier 1 capital	$ 25.0	$ 25.0
Additional dividends without obtaining prior approval from bank regulators declared and paid	$ 98

Additional dividends without obtaining prior approval from bank regulators declared and paid.

No definition available.

Name:	cvbf_AdditionalDividendsWithoutObtainingPriorApprovalFromBankRegulatorsDeclaredAndPaid
Namespace Prefix:	cvbf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant