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Benefit Plans - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended 0 Months Ended
Jun. 30, 2013
Jun. 30, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jan. 29, 2014
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Decrease in projected benefit obligations $ (22,900,000)us-gaap_DefinedBenefitPlanEffectOfSettlementsAndCurtailmentsOnAccumulatedBenefitObligation $ (22,900,000)us-gaap_DefinedBenefitPlanEffectOfSettlementsAndCurtailmentsOnAccumulatedBenefitObligation        
Decrease in accumulated other comprehensive loss, net of tax   (19,900,000)vly_ChangeInAccumulatedOtherComprehensiveIncomeDueToDefinedBenefitPlanRemeasurement        
Discount rate used to compute the obligation     4.89%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate [1]   4.87%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate [1]  
Expected rate of return on plan assets   7.50%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets 7.50%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets 7.50%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets 7.50%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets  
Curtailment loss 750,000us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments   0us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments (750,000)us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments 0us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments  
Net actuarial loss expected to be recognized as a component of net periodic pension expense     821,000us-gaap_DefinedBenefitPlanFutureAmortizationOfGainLoss      
Projected benefit obligation     176,339,000us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation 145,034,000us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation    
Salary expense     6,800,000us-gaap_SalariesWagesAndOfficersCompensation 6,000,000us-gaap_SalariesWagesAndOfficersCompensation 7,400,000us-gaap_SalariesWagesAndOfficersCompensation  
Expense for contributions to savings and investment plan     6,000,000vly_DefinedContributionPlanEmployerMatchingContribution 2,600,000vly_DefinedContributionPlanEmployerMatchingContribution 2,700,000vly_DefinedContributionPlanEmployerMatchingContribution  
Percentage increase in contribution     6.00%vly_PercentageOfIncreaseInMatchingContributionToAlignWithRetirementPlanMatch      
Number of shares authorized under stock incentive plan     7,400,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized      
Shares of common stock were available for issuance     3,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant      
Stock-based compensation expense     7,489,000us-gaap_ShareBasedCompensation 6,055,000us-gaap_ShareBasedCompensation 4,816,000us-gaap_ShareBasedCompensation  
Stock-based compensation     15,200,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized      
Average remaining vesting, years     5 years      
Minimum [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Discount rate used to compute the obligation       4.26%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 [1]    
Maximum [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Discount rate used to compute the obligation       4.87%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 [1]    
Incentive stock option's maximum term, years     10 years      
Non-qualified plans for former directors [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Projected benefit obligation     4,100,000us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
/ us-gaap_TitleOfIndividualAxis
= vly_NonQualifiedPlansForFormerDirectorsMember		 5,000,000us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
/ us-gaap_TitleOfIndividualAxis
= vly_NonQualifiedPlansForFormerDirectorsMember		    
Funded plans for former directors [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Projected benefit obligation     2,100,000us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
/ us-gaap_TitleOfIndividualAxis
= vly_FundedPlansForFormerDirectorsMember		 2,700,000us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
/ us-gaap_TitleOfIndividualAxis
= vly_FundedPlansForFormerDirectorsMember		    
Obligation included in other comprehensive loss, net of tax     1,200,000us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
/ us-gaap_TitleOfIndividualAxis
= vly_FundedPlansForFormerDirectorsMember		 1,300,000us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
/ us-gaap_TitleOfIndividualAxis
= vly_FundedPlansForFormerDirectorsMember		    
Obligation included in other comprehensive loss, tax     882,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax
/ us-gaap_TitleOfIndividualAxis
= vly_FundedPlansForFormerDirectorsMember		 965,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax
/ us-gaap_TitleOfIndividualAxis
= vly_FundedPlansForFormerDirectorsMember		    
Stock Options [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Stock awards granted (in shares)     0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		  
Stock Options and Restricted Stock [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Stock-based compensation expense     7,500,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= vly_StockOptionsAndRestrictedStockMember		 6,000,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= vly_StockOptionsAndRestrictedStockMember		 4,800,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= vly_StockOptionsAndRestrictedStockMember		  
Stock awards granted     3,900,000us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_AwardTypeAxis
= vly_StockOptionsAndRestrictedStockMember		 2,700,000us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_AwardTypeAxis
= vly_StockOptionsAndRestrictedStockMember		 2,500,000us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_AwardTypeAxis
= vly_StockOptionsAndRestrictedStockMember		  
Restricted Stock [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Compensation costs related to restricted stock awards     7,500,000us-gaap_RestrictedStockExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		 6,000,000us-gaap_RestrictedStockExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		 4,600,000us-gaap_RestrictedStockExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		  
Granted (in shares)     1,488,960us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		 479,541us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		 1,423,152us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		  
Performance Based Restricted Stock [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Granted (in shares)     240,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= vly_PerformanceBasedRestrictedStockMember		      
Time Based Restricted Stock [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Granted (in shares)     1,300,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= vly_TimeBasedRestrictedStockMember		      
Employee Stock Incentive Plan [Member] | Stock Options and Restricted Stock [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 9.10us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= vly_StockOptionsAndRestrictedStockMember
/ us-gaap_PlanNameAxis
= vly_EmployeeStockIncentivePlanMember		      
Employee Stock Incentive Plan [Member] | Performance Shares [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 9.86us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= vly_EmployeeStockIncentivePlanMember		      
Director Restricted Stock Plan [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Additional fees           $ 0vly_AdditionalFees
/ us-gaap_PlanNameAxis
= vly_DirectorRestrictedStockPlanMember
Other Pension Plan, Defined Benefit [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Discount rate used to compute the obligation 4.87%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPensionPlansDefinedBenefitMember		 4.87%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPensionPlansDefinedBenefitMember		 4.02%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPensionPlansDefinedBenefitMember		 4.89%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPensionPlansDefinedBenefitMember		 4.26%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPensionPlansDefinedBenefitMember		  
Equity securities [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Target asset allocation for qualified plan, minimum     25.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember		      
Target asset allocation for qualified plan, maximum     65.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember		      
Cumulative annual real return     7.00%vly_CumulativeAnnualRealReturn
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember		      
Equity securities [Member] | Consumer Price Index [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Cumulative annual real return, period     5 years      
Equity securities [Member] | S&P 500 Index [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Cumulative annual real return, period     3 years      
Debt securities [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Target asset allocation for qualified plan, minimum     35.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_DebtSecuritiesMember		      
Target asset allocation for qualified plan, maximum     75.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_DebtSecuritiesMember		      
Fixed income securities [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Cumulative annual real return     3.00%vly_CumulativeAnnualRealReturn
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_FixedIncomeSecuritiesMember		      
Fixed income securities [Member] | Consumer Price Index [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Cumulative annual real return, period     5 years      
Fixed income securities [Member] | Merrill Lynch Intermediate Government/Corporate Index [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Cumulative annual real return, period     3 years      
Share-based Compensation Award, Tranche One [Member] | Employee Stock Incentive Plan [Member] | Performance Shares [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     75.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= vly_EmployeeStockIncentivePlanMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheOneMember		      
Share-based Compensation Award, Tranche Two [Member] | Employee Stock Incentive Plan [Member] | Performance Shares [Member]            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     25.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= vly_EmployeeStockIncentivePlanMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember		      
[1] The discount rate for 2013 increased from 4.26 percent to 4.87 percent due to the plans’ freeze and remeasurement at June 30, 2013.