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Income Taxes - Components of Net Deferred Tax Asset (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Federal [Member] |  |
Deferred tax assets: |  |
Bad debt and credit loss deduction | $ 23,805 cvbf_DeferredTaxAssetsBadDebtAndCreditLossDeduction / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | $ 29,700 cvbf_DeferredTaxAssetsBadDebtAndCreditLossDeduction / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Net operating loss carryforward | 672 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 781 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Deferred compensation | 3,300 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 3,024 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Other intangibles | 5 cvbf_DeferredTaxAssetsOtherIntangibles / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 8 cvbf_DeferredTaxAssetsOtherIntangibles / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
PCI loans | 23,667 cvbf_DeferredTaxAssetsPurchasedCreditImpairedLoans / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 26,360 cvbf_DeferredTaxAssetsPurchasedCreditImpairedLoans / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
California franchise tax | 3,461 cvbf_DeferredTaxAssetsFranchiseTax / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 1,629 cvbf_DeferredTaxAssetsFranchiseTax / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Unrealized loss on investment securities, net | 0 us-gaap_DeferredTaxAssetsUnrealizedLossesOnTradingSecurities / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 5,012 us-gaap_DeferredTaxAssetsUnrealizedLossesOnTradingSecurities / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Other, net | 6,140 us-gaap_DeferredTaxAssetsOther / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 4,907 us-gaap_DeferredTaxAssetsOther / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Gross deferred tax asset | 61,050 us-gaap_DeferredTaxAssetsGross / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 71,421 us-gaap_DeferredTaxAssetsGross / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Deferred tax liabilities: |  |
Depreciation | 4,019 us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 5,489 us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Intangibles - acquistions | 1,858 cvbf_DeferredTaxLiabilitiesAcquiredIntangibles / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 2,024 cvbf_DeferredTaxLiabilitiesAcquiredIntangibles / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
FDIC indemnification asset | 13,831 cvbf_DeferredTaxLiabilitiesFDICIndemnificationAsset / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 14,269 cvbf_DeferredTaxLiabilitiesFDICIndemnificationAsset / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
FHLB stock | 3,913 cvbf_DeferredTaxLiabilitiesFederalHomeLoanBankStock / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 4,388 cvbf_DeferredTaxLiabilitiesFederalHomeLoanBankStock / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Deferred income | 2,430 us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 2,706 us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Unrealized gain on investment securities, net | 16,695 us-gaap_DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 0 us-gaap_DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Gross deferred tax liability | 42,746 us-gaap_DeferredTaxLiabilities / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 28,876 us-gaap_DeferredTaxLiabilities / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Net deferred tax asset | 18,304 us-gaap_DeferredTaxAssetsLiabilitiesNet / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 42,545 us-gaap_DeferredTaxAssetsLiabilitiesNet / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
State [Member] |  |
Deferred tax assets: |  |
Bad debt and credit loss deduction | 6,014 cvbf_DeferredTaxAssetsBadDebtAndCreditLossDeduction / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 8,226 cvbf_DeferredTaxAssetsBadDebtAndCreditLossDeduction / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Net operating loss carryforward | 34 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 34 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Deferred compensation | 1,030 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 942 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Other intangibles | 668 cvbf_DeferredTaxAssetsOtherIntangibles / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 620 cvbf_DeferredTaxAssetsOtherIntangibles / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
FDIC indemnification asset | 6,498 cvbf_DeferredTaxAssetsFdicIndemnificationAsset / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 6,363 cvbf_DeferredTaxAssetsFdicIndemnificationAsset / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Unrealized loss on investment securities, net | 0 us-gaap_DeferredTaxAssetsUnrealizedLossesOnTradingSecurities / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 1,744 us-gaap_DeferredTaxAssetsUnrealizedLossesOnTradingSecurities / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Other, net | 1,911 us-gaap_DeferredTaxAssetsOther / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 1,554 us-gaap_DeferredTaxAssetsOther / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Gross deferred tax asset | 16,155 us-gaap_DeferredTaxAssetsGross / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 19,483 us-gaap_DeferredTaxAssetsGross / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Deferred tax liabilities: |  |
Depreciation | (589)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | (1,058)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
PCI loans | 4,389 cvbf_DeferredTaxLiabilitiesPurchasedCreditImpairedLoans / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 3,935 cvbf_DeferredTaxLiabilitiesPurchasedCreditImpairedLoans / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
FHLB stock | (797)cvbf_DeferredTaxLiabilitiesFederalHomeLoanBankStock / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | (945)cvbf_DeferredTaxLiabilitiesFederalHomeLoanBankStock / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Deferred income | (374)us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | (479)us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Unrealized gain on investment securities, net | (5,808)us-gaap_DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 0 us-gaap_DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Gross deferred tax liability | 11,957 us-gaap_DeferredTaxLiabilities / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 6,417 us-gaap_DeferredTaxLiabilities / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Net deferred tax asset | $ 4,198 us-gaap_DeferredTaxAssetsLiabilitiesNet / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | $ 13,066 us-gaap_DeferredTaxAssetsLiabilitiesNet / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember

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- Definition Deferred tax asset FDIC indemnification asset. + References No definition available. + Details
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- Definition Deferred tax assets purchased credit impaired loans. + References No definition available. + Details
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- Definition Deferred tax liabilities federal home loan Bank stock. + References No definition available. + Details
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- Definition Deferred tax liabilities purchased credit impaired loans. + References No definition available. + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Asset -URI http://asc.fasb.org/extlink&oid=6510090 + Details
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from compensation and benefits costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards after valuation allowances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31931-109318 + Details
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