Commitments and Contingencies - Gains (Losses) Related to Interest Rate Derivatives Designated as Hedges of Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Gain Loss On Fair Value Hedges Recognized In Earnings [Line Items]
Gain (loss) related to hedged loans	$ 28,907	$ 3,397	$ 0
Fair value hedge interest rate swaps \| Derivative—interest rate swaps: \| Interest income
Gain Loss On Fair Value Hedges Recognized In Earnings [Line Items]
Gain (loss) related to derivative interest rate swaps	0	0	229
Fair value hedge interest rate swaps \| Derivative—interest rate swaps: \| Interest expense
Gain Loss On Fair Value Hedges Recognized In Earnings [Line Items]
Gain (loss) related to derivative interest rate swaps	(466)	(3,335)	0
Fair value hedge interest rate swaps \| Hedged item—subordinated debt and loans: \| Derivatives designated as hedging instruments \| Interest income
Gain Loss On Fair Value Hedges Recognized In Earnings [Line Items]
Gain (loss) related to hedged loans	0	0	(229)
Fair value hedge interest rate swaps \| Hedged item—subordinated debt and loans: \| Derivatives designated as hedging instruments \| Interest expense
Gain Loss On Fair Value Hedges Recognized In Earnings [Line Items]
Gain (loss) related to hedged loans	$ 741	$ 3,397	$ 0

Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 25
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986

+ Details

Name:	us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

+ References

+ Details

Name:	us-gaap_ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Gain Loss On Fair Value Hedges Recognized In Earnings [Line Items]

+ References

No definition available.

+ Details

Name:	vly_GainLossOnFairValueHedgesRecognizedInEarningsLineItems
Namespace Prefix:	vly_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_FairValueHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_InterestIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_InterestExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: