<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2025"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2025/ffd-2025.xsd"
      xlink:type="simple"/>
    <context id="rc">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001587987</identifier>
        </entity>
        <period>
            <startDate>2025-11-25</startDate>
            <endDate>2025-11-25</endDate>
        </period>
    </context>
    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001587987</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-11-25</startDate>
            <endDate>2025-11-25</endDate>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <unit id="Shares">
        <measure>shares</measure>
    </unit>
    <ffd:FormTp contextRef="rc" id="ixv-351">S-4</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-352">S-4/A</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-353">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:RegnFileNb contextRef="rc" id="ixv-354">333-291615</ffd:RegnFileNb>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-355">0001587987</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-356">NewtekOne, Inc.</dei:EntityRegistrantName>
    <ffd:OfferingTableNa contextRef="rc" id="hiddenrcOfferingTableNa" xsi:nil="true"/>
    <ffd:OffsetTableNa contextRef="rc" id="hiddenrcOffsetTableNa">N/A</ffd:OffsetTableNa>
    <ffd:CombinedProspectusTableNa contextRef="rc" id="hiddenrcCombinedProspectusTableNa">N/A</ffd:CombinedProspectusTableNa>
    <ffd:FormTp contextRef="rc" id="ixv-384">S-4</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-385">NewtekOne, Inc.</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="offrl_1" id="ixv-386">true</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_1" id="ixv-387">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_1" id="ixv-388">8.5% Fixed Rate Senior Notes Due 2031</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="offrl_1" id="ixv-389">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_1"
      decimals="0"
      id="ixv-390"
      unitRef="Shares">95000000</ffd:AmtSctiesRegd>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-391"
      unitRef="USD">94762500.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeAmt
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-392"
      unitRef="USD">13086.70</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="rc" decimals="INF" id="ixv-393" unitRef="USD">94762500.00</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="rc" decimals="INF" id="ixv-394" unitRef="USD">13086.70</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="rc" decimals="INF" id="ixv-395" unitRef="USD">13086.70</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="INF" id="ixv-396" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="INF" id="ixv-397" unitRef="USD">0.00</ffd:NetFeeAmt>
    <ffd:Rule457fFlg contextRef="offrl_1" id="ixv-398">true</ffd:Rule457fFlg>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-399">Estimated pursuant to Rule 457(f) under the Securities Act of 1933, as amended, solely for the purposes of calculating the registration fee. Represents the maximum aggregate offering price of all notes to be offered in the exchange offer to which the registration statement relates.</ffd:OfferingNote>
    <ffd:AmtSctiesRcvd
      contextRef="offrl_1"
      decimals="0"
      id="ixv-400"
      unitRef="Shares">95000000</ffd:AmtSctiesRcvd>
    <ffd:ValSctiesRcvdPerShr
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-401"
      unitRef="USD">1.00</ffd:ValSctiesRcvdPerShr>
    <ffd:ValSctiesRcvd
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-402"
      unitRef="USD">95000000.00</ffd:ValSctiesRcvd>
    <ffd:FeeNoteMaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-403"
      unitRef="USD">94762500.00</ffd:FeeNoteMaxAggtOfferingPric>
</xbrl>
