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Loans and Lease Finance Receivables and Allowance for Loan Losses - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015 SecurityLoan	Mar. 31, 2014	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total fixed rate loans held	$ 1,810,000,000us-gaap_LoansReceivableWithFixedRatesOfInterest1
Secure borrowings and available lines of credit from FHLB and Federal Reserve Bank	2,820,000,000us-gaap_LoansPledgedAsCollateral		2,780,000,000us-gaap_LoansPledgedAsCollateral
Impaired, at carrying value	68,377,000us-gaap_ImpairedFinancingReceivableRecordedInvestment	106,596,000us-gaap_ImpairedFinancingReceivableRecordedInvestment	85,792,000us-gaap_ImpairedFinancingReceivableRecordedInvestment
Loans classified as troubled debt restructured	62,200,000cvbf_LoansClassifiedAsTroubledDebtRestructured
Provision for unfunded loan commitments	500,000cvbf_IncreaseOrDecreaseInProvisionForUnfundedLoanCommitments	0cvbf_IncreaseOrDecreaseInProvisionForUnfundedLoanCommitments
Reserve for credit risk for undisbursed commitments	7,200,000cvbf_ReserveForUndisbursedCommitments		7,700,000cvbf_ReserveForUndisbursedCommitments
Number of loans	0cvbf_NumberOfLoans
Allocation of allowance to troubled debt restructuring	707,000cvbf_AllocationOfReservesToTroubledDebtRestructuring		726,000cvbf_AllocationOfReservesToTroubledDebtRestructuring
Nonaccrual commercial and industrial loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	952,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cvbf_NonaccrualCommercialAndIndustrialLoansMember
Commercial real estate loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)	69.23%cvbf_LoansReceivablePercentageOfPortfolio / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_CommercialRealEstateLoansMember
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)	1.53%cvbf_LoansReceivablePercentageOfPortfolio / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = us-gaap_ConstructionLoansMember
Nonaccrual dairy and livestock loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	103,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_NonaccrualDairyAndLivestockLoansMember
Impaired loans modified in troubled debt restructure [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired, at carrying value	62,200,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_ImpairedLoansModifiedInTroubledDebtRestructureMember
Loans, Excluding PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial real estate loans	2,499,183,000us-gaap_LoansReceivableCommercialMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember		2,487,803,000us-gaap_LoansReceivableCommercialMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
Dairy & livestock and agribusiness	173,441,000us-gaap_LoansReceivableCommercialFinancialAndAgricultural / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember		279,173,000us-gaap_LoansReceivableCommercialFinancialAndAgricultural / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
Impaired, at carrying value			85,800,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
Outstanding balance	23,001,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember		32,186,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember
Loans, Excluding PCI Loans [Member] | Commercial real estate loans [Member] | Loans secured by farmland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)	6.04%cvbf_LoansReceivablePercentageOfPortfolio / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = cvbf_SecuredByFarmLandMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_CommercialRealEstateLoansMember		6.66%cvbf_LoansReceivablePercentageOfPortfolio / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = cvbf_SecuredByFarmLandMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_CommercialRealEstateLoansMember
Commercial real estate loans	150,900,000us-gaap_LoansReceivableCommercialMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = cvbf_SecuredByFarmLandMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_CommercialRealEstateLoansMember		165,600,000us-gaap_LoansReceivableCommercialMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = cvbf_SecuredByFarmLandMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_CommercialRealEstateLoansMember
Loans, Excluding PCI Loans [Member] | Commercial real estate loans [Member] | Loans secured by farmland [Member] | Loans secured by Dairy & livestock land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial real estate loans	131,500,000us-gaap_LoansReceivableCommercialMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = cvbf_SecuredByFarmLandMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_CommercialRealEstateLoansMember / us-gaap_MajorPropertyClassAxis = cvbf_SecuredByDairyAndLiveStockLandMember		144,100,000us-gaap_LoansReceivableCommercialMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = cvbf_SecuredByFarmLandMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_CommercialRealEstateLoansMember / us-gaap_MajorPropertyClassAxis = cvbf_SecuredByDairyAndLiveStockLandMember
Loans, Excluding PCI Loans [Member] | Commercial real estate loans [Member] | Loans secured by farmland [Member] | Loans secured by agricultural land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial real estate loans	19,400,000us-gaap_LoansReceivableCommercialMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = cvbf_SecuredByFarmLandMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_CommercialRealEstateLoansMember / us-gaap_MajorPropertyClassAxis = cvbf_SecuredByAgriculturalLandMember		21,500,000us-gaap_LoansReceivableCommercialMortgage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = cvbf_SecuredByFarmLandMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_CommercialRealEstateLoansMember / us-gaap_MajorPropertyClassAxis = cvbf_SecuredByAgriculturalLandMember
Loans, Excluding PCI Loans [Member] | Dairy & livestock and agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)	4.80%cvbf_LoansReceivablePercentageOfPortfolio / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_DairyLivestockAndAgribusinessMember		7.55%cvbf_LoansReceivablePercentageOfPortfolio / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_DairyLivestockAndAgribusinessMember
Loans, Excluding PCI Loans [Member] | Dairy & livestock loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Dairy & livestock and agribusiness	161,500,000us-gaap_LoansReceivableCommercialFinancialAndAgricultural / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_DairyAndLivestockLoansMember		268,100,000us-gaap_LoansReceivableCommercialFinancialAndAgricultural / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_DairyAndLivestockLoansMember
Loans, Excluding PCI Loans [Member] | Agribusiness loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Dairy & livestock and agribusiness	12,000,000us-gaap_LoansReceivableCommercialFinancialAndAgricultural / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_AgribusinessMember		11,100,000us-gaap_LoansReceivableCommercialFinancialAndAgricultural / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_LoansExcludingPurchasedCreditImpairedLoansMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_AgribusinessMember
Nonaccrual commercial real estate loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	16,800,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_NonaccrualCommercialRealEstateLoansMember
Nonaccrual consumer loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	463,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_NonaccrualConsumerLoansMember
Nonperforming financing receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired, at carrying value	16,800,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_InternalCreditAssessmentAxis = us-gaap_NonperformingFinancingReceivableMember
Loans classified as troubled debt restructured	16,800,000cvbf_LoansClassifiedAsTroubledDebtRestructured / us-gaap_InternalCreditAssessmentAxis = us-gaap_NonperformingFinancingReceivableMember
Performing financing receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired, at carrying value	68,400,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Loans classified as troubled debt restructured	45,400,000cvbf_LoansClassifiedAsTroubledDebtRestructured / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Number of performing loans	34cvbf_NumberOfPerformingLoans / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Number of loans removed from TDR classification	0cvbf_NumberOfLoansRemovedFromTroubledDebtRestructuringsStatus / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember	0cvbf_NumberOfLoansRemovedFromTroubledDebtRestructuringsStatus / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Performing financing receivable [Member] | Commercial real estate loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured	25,100,000cvbf_LoansClassifiedAsTroubledDebtRestructured / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_CommercialRealEstateLoansMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Number of loans	12cvbf_NumberOfLoans / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_CommercialRealEstateLoansMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Performing financing receivable [Member] | Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured	7,600,000cvbf_LoansClassifiedAsTroubledDebtRestructured / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = us-gaap_ConstructionLoansMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Number of loans	1cvbf_NumberOfLoans / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = us-gaap_ConstructionLoansMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Performing financing receivable [Member] | Dairy & livestock and agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured	7,200,000cvbf_LoansClassifiedAsTroubledDebtRestructured / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_DairyLivestockAndAgribusinessMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Number of loans	5cvbf_NumberOfLoans / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_DairyLivestockAndAgribusinessMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Performing financing receivable [Member] | Single-family Residential Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured	3,700,000cvbf_LoansClassifiedAsTroubledDebtRestructured / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_SingleFamilyResidentialLoanMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Number of loans	11cvbf_NumberOfLoans / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_SingleFamilyResidentialLoanMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Performing financing receivable [Member] | Commercial and industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured	1,400,000cvbf_LoansClassifiedAsTroubledDebtRestructured / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_CommercialAndIndustrialLoansMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Number of loans	4cvbf_NumberOfLoans / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = cvbf_CommercialAndIndustrialLoansMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Performing financing receivable [Member] | Consumer and other loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured	418,000cvbf_LoansClassifiedAsTroubledDebtRestructured / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = us-gaap_ConsumerPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Number of loans	1cvbf_NumberOfLoans / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = us-gaap_ConsumerPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Nonaccrual single family mortgage loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	2,200,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_InternalCreditAssessmentAxis = cvbf_NonaccrualSingleFamilyMortgageLoansMember
Allowance impaired loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured	794,000cvbf_LoansClassifiedAsTroubledDebtRestructured / us-gaap_InternalCreditAssessmentAxis = cvbf_AllowanceImpairedLoansMember
Allowance impaired non-covered loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired, at carrying value			$ 1,500,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_InternalCreditAssessmentAxis = cvbf_AllowanceImpairedNoncoveredLoansMember

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Allocation of reserves to troubled debt restructuring.

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Provision for unfunded commitments during the period, representing either increases or decreases.

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Loans classified as a troubled debt restructured.

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Loans receivable percentage of portfolio.

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Number Of Loans

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Reserve for undisbursed commitments.

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Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (d)

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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-Name Accounting Standards Codification

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Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.

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Amount before allowance of loans issued to agricultural, commercial and industrial, and financial institutions. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

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-Name Accounting Standards Codification

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-Section S99

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-Number 210

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-Paragraph 7

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Amount before allowance of mortgage loans on existing land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

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-Number 210

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-Name Accounting Standards Codification

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-SubTopic 10

-Section 45

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