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Employee Benefit Plans - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Compensation Related Costs [Abstract] |  |  |
Severance costs | $ 866,000 us-gaap_SeveranceCosts1 | $ 881,000 us-gaap_SeveranceCosts1 | $ 961,000 us-gaap_SeveranceCosts1
Deferred compensation agreements expenses | 544,000 cvbf_DeferredCompensationAgreementsExpenses | 561,000 cvbf_DeferredCompensationAgreementsExpenses | 494,000 cvbf_DeferredCompensationAgreementsExpenses
Maximum percentage of salary defer by individual under deferred compensation plan | 75.00%cvbf_MaximumPercentageOfSalaryDeferByIndividualUnderDeferredCompensationPlan |  |
Maximum percentage of bonus defer by individual under deferred compensation plan | 100.00%cvbf_MaximumPercentageOfBonusDeferByIndividualUnderDeferredCompensationPlan |  |
Deferred compensation plan, discretionary payments | 0 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount | 0 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount | 0 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Amounts paid under deferred compensation and salary continuation agreements | 2,100,000 cvbf_AmountsDeferredByEmployeesUnderDeferredCompensationPlans |  |
Employer contribution percentage to 401(k) plan | 3.00%cvbf_EmployerContributionPercentageEmployeeBenefitPlan |  |
Employer contribution in profit-sharing plan | $ 3,100,000 cvbf_EmployerContributionInProfitSharingPlan | $ 2,700,000 cvbf_EmployerContributionInProfitSharingPlan | $ 2,400,000 cvbf_EmployerContributionInProfitSharingPlan

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- Definition Amounts Deferred By Employees Under Deferred Compensation Plans + References No definition available. + Details
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- Definition Amount of expense incurred related to deferred compensation plans. + References No definition available. + Details
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- Definition Employer contribution in profit sharing plan. + References No definition available. + Details
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- Definition The percentage contribution made by employer to employee benefit plans. + References No definition available. + Details
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- Definition Maximum percentage of Bonus defer by individual under deferred compensation plan. + References No definition available. + Details
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- Definition Maximum percentage of salary defer by individual under deferred compensation plan. + References No definition available. + Details
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- Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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