<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:us-gaap="http://fasb.org/us-gaap/2025"
  xmlns:vly="http://www.valleynationalbank.com/20260825"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="vly-20260825.xsd" xlink:type="simple"/>
    <context id="duration_2026-08-25_to_2026-08-25">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000714310</identifier>
        </entity>
        <period>
            <startDate>2026-08-25</startDate>
            <endDate>2026-08-25</endDate>
        </period>
    </context>
    <context id="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-CommonStockNoParValueMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000714310</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">vly:CommonStockNoParValueMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-08-25</startDate>
            <endDate>2026-08-25</endDate>
        </period>
    </context>
    <context id="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-NonCumulativePerpetualPreferredStockSeriesANoParValue2Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000714310</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">vly:NonCumulativePerpetualPreferredStockSeriesANoParValue2Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-08-25</startDate>
            <endDate>2026-08-25</endDate>
        </period>
    </context>
    <context id="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-NonCumulativePerpetualPreferredStockSeriesBNoParValueMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000714310</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">vly:NonCumulativePerpetualPreferredStockSeriesBNoParValueMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-08-25</startDate>
            <endDate>2026-08-25</endDate>
        </period>
    </context>
    <context id="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-NonCumulativePerpetualPreferredStockSeriesCNoParValue1Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000714310</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">vly:NonCumulativePerpetualPreferredStockSeriesCNoParValue1Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-08-25</startDate>
            <endDate>2026-08-25</endDate>
        </period>
    </context>
    <dei:AmendmentFlag contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-338">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="duration_2026-08-25_to_2026-08-25"
      id="Hidden_dei_EntityCentralIndexKey">0000714310</dei:EntityCentralIndexKey>
    <dei:DocumentType contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-381">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-382">2026-08-25</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-383">Valley National Bancorp</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-384">NJ</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-385">1-11277</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-386">22-2477875</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1 contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-387">One Penn Plaza</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-388">New York</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-389">NY</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-390">10119</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-391">(973)</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-392">305-8800</dei:LocalPhoneNumber>
    <dei:WrittenCommunications contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-393">true</dei:WrittenCommunications>
    <dei:SolicitingMaterial contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-394">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-395">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-396">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-CommonStockNoParValueMember"
      id="ixv-397">Common Stock, no par value</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-CommonStockNoParValueMember"
      id="ixv-398">VLY</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-CommonStockNoParValueMember"
      id="ixv-399">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-NonCumulativePerpetualPreferredStockSeriesANoParValue2Member"
      id="ixv-400">Non-Cumulative Perpetual Preferred Stock, Series&#160;A, no par value</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-NonCumulativePerpetualPreferredStockSeriesANoParValue2Member"
      id="ixv-401">VLYPP</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-NonCumulativePerpetualPreferredStockSeriesANoParValue2Member"
      id="ixv-402">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-NonCumulativePerpetualPreferredStockSeriesBNoParValueMember"
      id="ixv-403">Non-Cumulative Perpetual Preferred Stock, Series&#160;B, no par value</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-NonCumulativePerpetualPreferredStockSeriesBNoParValueMember"
      id="ixv-404">VLYPO</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-NonCumulativePerpetualPreferredStockSeriesBNoParValueMember"
      id="ixv-405">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-NonCumulativePerpetualPreferredStockSeriesCNoParValue1Member"
      id="ixv-406">Non-Cumulative Perpetual Preferred Stock, Series&#160;C, no par value</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-NonCumulativePerpetualPreferredStockSeriesCNoParValue1Member"
      id="ixv-407">VLYPN</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-08-25_to_2026-08-25_us-gaap-StatementClassOfStockAxis_vly-NonCumulativePerpetualPreferredStockSeriesCNoParValue1Member"
      id="ixv-408">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany contextRef="duration_2026-08-25_to_2026-08-25" id="ixv-409">false</dei:EntityEmergingGrowthCompany>
</xbrl>
