<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xml:lang="en-US"
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2026"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2026"
  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">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2026/ffd-2026.xsd"
      xlink:type="simple"/>
    <context id="c-1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001004702</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-28</startDate>
            <endDate>2026-05-28</endDate>
        </period>
    </context>
    <context id="c-2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001004702</identifier>
        </entity>
        <period>
            <startDate>2026-05-28</startDate>
            <endDate>2026-05-28</endDate>
        </period>
    </context>
    <unit id="shares">
        <measure>shares</measure>
    </unit>
    <unit id="usdPerShare">
        <divide>
            <unitNumerator>
                <measure>iso4217:USD</measure>
            </unitNumerator>
            <unitDenominator>
                <measure>shares</measure>
            </unitDenominator>
        </divide>
    </unit>
    <unit id="usd">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="number">
        <measure>pure</measure>
    </unit>
    <dei:EntityCentralIndexKey contextRef="c-2" id="f-16">0001004702</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="c-2" id="f-17">OceanFirst Financial Corp.</dei:EntityRegistrantName>
    <ffd:FormTp contextRef="c-2" id="f-18">S-8</ffd:FormTp>
    <ffd:SubmissnTp contextRef="c-2" id="f-19">S-8</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="c-2" id="f-20">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:OfferingSctyTp contextRef="c-1" id="f-1">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c-1" id="f-2">Common stock, $0.01 par value per share</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="c-1" id="f-3">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd contextRef="c-1" decimals="0" id="f-4" unitRef="shares">8200000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="c-1"
      decimals="2"
      id="f-5"
      unitRef="usdPerShare">18.92</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric contextRef="c-1" decimals="2" id="f-6" unitRef="usd">155144000</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate contextRef="c-1" decimals="8" id="f-7" unitRef="number">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt contextRef="c-1" decimals="2" id="f-8" unitRef="usd">21425.39</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="c-2" decimals="2" id="f-9" unitRef="usd">155144000</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="c-2" decimals="2" id="f-10" unitRef="usd">21425.39</ffd:TtlFeeAmt>
    <ffd:PrevslyPdFlg contextRef="c-1" id="f-11">false</ffd:PrevslyPdFlg>
    <ffd:TtlOffsetAmt contextRef="c-2" decimals="2" id="f-12" unitRef="usd">0.00</ffd:TtlOffsetAmt>
    <ffd:TtlOfferingAmt contextRef="c-2" decimals="2" id="f-13" unitRef="usd">155144000</ffd:TtlOfferingAmt>
    <ffd:NetFeeAmt contextRef="c-2" decimals="2" id="f-14" unitRef="usd">21425.39</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="c-1" id="f-15">&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:112%;padding-left:24.34pt"&gt;Together with an indeterminate number of additional shares that may be necessary to adjust the number of shares reserved for issuance pursuant to the OceanFirst Financial Corp. 2026 Stock Incentive Plan (the &#x201c;Equity Plan&#x201d;) as a result of a stock split, stock dividend or similar adjustment of the outstanding common stock of OceanFirst Financial Corp. (the &#x201c;Company&#x201d;) pursuant to 17 C.F.R. Section 230.416(a), this represents 8,200,000 shares of common stock of the Company issuable pursuant to the Equity Plan.&lt;/span&gt;&lt;div style="padding-left:36pt;text-align:justify;text-indent:-36pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:112%"&gt;(2)&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:112%;padding-left:24.34pt"&gt;The proposed maximum offering price per share of $18.92 is &lt;/span&gt;&lt;span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:112%"&gt;estimated solely for the purpose of calculating the registration fee in accordance with Rules 457(c) and (h) under the Securities Act of 1933, as amended, and is based on the average of the high and low prices of &lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:112%"&gt;the Company&#x2019;s &lt;/span&gt;&lt;span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:112%"&gt;common stock as reported on the Nasdaq Global Select Market on May 26, 2026&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:112%"&gt;.&lt;/span&gt;&lt;/div&gt;</ffd:OfferingNote>
</xbrl>
