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  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"
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  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2025/ffd-2025.xsd"
      xlink:type="simple"/>
    <context id="c0">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000739421</identifier>
        </entity>
        <period>
            <startDate>2026-04-27</startDate>
            <endDate>2026-04-27</endDate>
        </period>
    </context>
    <context id="c1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000739421</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-04-27</startDate>
            <endDate>2026-04-27</endDate>
        </period>
    </context>
    <unit id="shares">
        <measure>shares</measure>
    </unit>
    <unit id="usdPershares">
        <divide>
            <unitNumerator>
                <measure>iso4217:USD</measure>
            </unitNumerator>
            <unitDenominator>
                <measure>shares</measure>
            </unitDenominator>
        </divide>
    </unit>
    <unit id="usd">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <ffd:SubmissnTp contextRef="c0" id="ixv-156">S-8</ffd:SubmissnTp>
    <ffd:FormTp contextRef="c0" id="ixv-157">S-8</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="c0" id="ixv-25">CITIZENS FINANCIAL SERVICES, INC.</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="c1" id="ixv-158">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c1" id="ixv-71">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c1" id="ixv-74">Common Stock, par value $1.00 per share</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="c1" id="ixv-159">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="c1"
      decimals="INF"
      id="ixv-160"
      unitRef="shares">250000</ffd:AmtSctiesRegd>
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      contextRef="c1"
      decimals="INF"
      id="ixv-161"
      unitRef="usdPershares">69</ffd:MaxOfferingPricPerScty>
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    <ffd:FeeRate contextRef="c1" decimals="INF" id="ixv-163" unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt contextRef="c1" decimals="2" id="ixv-164" unitRef="usd">2382.23</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="c0" decimals="INF" id="ixv-165" unitRef="usd">17250000</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="c0" decimals="2" id="ixv-166" unitRef="usd">2382.23</ffd:TtlFeeAmt>
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    <ffd:TtlOffsetAmt contextRef="c0" decimals="0" id="ixv-168" unitRef="usd">0</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="c0" decimals="2" id="ixv-169" unitRef="usd">2382.23</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="c1" id="ixv-126">&lt;table style="font-size: 12pt; border-spacing: 0px; border-collapse: collapse; width: 100%;"&gt; &lt;tr style="height: 0px; font-size: 0px;"&gt;&lt;td style="width: 1%;"&gt;&#160;&lt;/td&gt;&lt;td style="width: 99%;"&gt;&#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr style="vertical-align: top;"&gt; &lt;td style="padding: 0px 0pt;"&gt; &lt;div style="margin-bottom: 4pt;"&gt; &lt;span style="font-size: 10.0pt;"&gt;(1)&lt;/span&gt; &lt;/div&gt; &lt;/td&gt; &lt;td style="padding: 0px 5.4pt; text-align: left;"&gt; &lt;div style="margin-bottom: 4pt;"&gt; &lt;span style="font-size: 10.0pt;"&gt;&lt;span style="line-height: 110%;"&gt;Represents the
maximum number of shares of the registrant&#x2019;s common stock, par value $1.00 per
share (the &#x201c;Common Stock&#x201d;), reserved for issuance under the Citizens Financial
Services, Inc. 2026 Equity Incentive Plan. Pursuant to Rule 416(a) of the
Securities Act of 1933, as amended, this registration statement also covers any
additional shares of the Common Stock that may become issuable under the plan
referenced above by reason of any stock dividend, stock split, recapitalization
or other similar transaction.&lt;/span&gt;&lt;/span&gt; &lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="font-size: 12pt; border-spacing: 0px; border-collapse: collapse; width: 100%;"&gt;
   &lt;tr style="height: 0px; font-size: 0px;"&gt;&lt;td style="width: 1%;"&gt;&#160;&lt;/td&gt;&lt;td style="width: 99%;"&gt;&#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr style="vertical-align: top;"&gt;
    &lt;td style="padding: 0px 0pt;"&gt;
     &lt;div style="margin-bottom: 4pt;"&gt;
      &lt;span style="font-size: 10.0pt;"&gt;(2)&lt;/span&gt;
     &lt;/div&gt;
    &lt;/td&gt;
    &lt;td style="padding: 0px 5.4pt; text-align: left;"&gt;
     &lt;div style="margin-bottom: 4pt;"&gt;
      &lt;span style="font-size: 10.0pt;"&gt;&lt;span style="line-height: 110%;"&gt;Estimated solely for
the purpose of calculating the registration fee pursuant to Rule 457(c) and
Rule 457(h) under the Securities Act. The offering price per share and
aggregate offering price are based upon the average of the high and low prices
per share of common stock of the Registrant as reported on The NASDAQ Global
Market LLC on April 21, 2025, which was $69.00 per share.&lt;/span&gt;&lt;/span&gt;&lt;/div&gt;
    &lt;/td&gt;
   &lt;/tr&gt;
  &lt;/table&gt;</ffd:OfferingNote>
    <dei:EntityCentralIndexKey contextRef="c0" id="ixv-172">0000739421</dei:EntityCentralIndexKey>
    <ffd:FeeExhibitTp contextRef="c0" id="ixv-173">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:OffsetTableNa contextRef="c0" id="ixv-174">N/A</ffd:OffsetTableNa>
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