<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>323</ContextCount>
  <ElementCount>429</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>99</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>12</UnitCount>
  <MyReports>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0000002 - Document - Audit Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/AuditInformation</Role>
      <ShortName>Audit Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>9952151 - Statement - CONOLIDATED STATEMENTS OF INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/CONOLIDATEDSTATEMENTSOFINCOME</Role>
      <ShortName>CONOLIDATED STATEMENTS OF INCOME</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>9952152 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>9952153 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>9952154 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/CONSOLIDATEDBALANCESHEETS</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>9952155 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/CONSOLIDATEDBALANCESHEETSParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>9952156 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>9952157 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/CONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITY</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>9952158 - Disclosure - Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/AccountingPolicies</Role>
      <ShortName>Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>9952159 - Disclosure - Investments in Joint Ventures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/InvestmentsinJointVentures</Role>
      <ShortName>Investments in Joint Ventures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>9952160 - Disclosure - Related Party Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/RelatedPartyArrangements</Role>
      <ShortName>Related Party Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>9952161 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/Debt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>9952162 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>9952163 - Disclosure - Earnings per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/EarningsperShare</Role>
      <ShortName>Earnings per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>9952164 - Disclosure - Stock-Based Compensation Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/StockBasedCompensationPlans</Role>
      <ShortName>Stock-Based Compensation Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>9952165 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>9952166 - Disclosure - Employee Benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/EmployeeBenefits</Role>
      <ShortName>Employee Benefits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>9952167 - Disclosure - Business Segments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/BusinessSegments</Role>
      <ShortName>Business Segments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>9952168 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>9952169 - Disclosure - Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/Contingencies</Role>
      <ShortName>Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>9952170 - Disclosure - Commitments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/Commitments</Role>
      <ShortName>Commitments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>9952171 - Disclosure - Concentrations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/Concentrations</Role>
      <ShortName>Concentrations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>9952172 - Disclosure - Unusual or Infrequent Items Impacting Results</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/UnusualorInfrequentItemsImpactingResults</Role>
      <ShortName>Unusual or Infrequent Items Impacting Results</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>9952173 - Disclosure - Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/IntangibleAssets</Role>
      <ShortName>Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>9952174 - Disclosure - Altman Logistics Platform Acquisition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/AltmanLogisticsPlatformAcquisition</Role>
      <ShortName>Altman Logistics Platform Acquisition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>9952175 - Disclosure - Contributions from partner</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/Contributionsfrompartner</Role>
      <ShortName>Contributions from partner</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>9952176 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>995447 - Disclosure - Insider Trading Policies and Procedures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc</Role>
      <ShortName>Insider Trading Policies and Procedures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure</Role>
      <ShortName>Cybersecurity Risk Management and Strategy Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>9955511 - Disclosure - Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/AccountingPoliciesPolicies</Role>
      <ShortName>Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://frphdev.com/role/AccountingPolicies</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>9955512 - Disclosure - Investments in Joint Ventures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/InvestmentsinJointVenturesTables</Role>
      <ShortName>Investments in Joint Ventures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://frphdev.com/role/InvestmentsinJointVentures</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>9955513 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/DebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://frphdev.com/role/Debt</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>9955514 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://frphdev.com/role/Leases</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9955515 - Disclosure - Earnings per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/EarningsperShareTables</Role>
      <ShortName>Earnings per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://frphdev.com/role/EarningsperShare</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>9955516 - Disclosure - Stock-Based Compensation Plans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/StockBasedCompensationPlansTables</Role>
      <ShortName>Stock-Based Compensation Plans (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://frphdev.com/role/StockBasedCompensationPlans</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>9955517 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://frphdev.com/role/IncomeTaxes</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9955518 - Disclosure - Business Segments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/BusinessSegmentsTables</Role>
      <ShortName>Business Segments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://frphdev.com/role/BusinessSegments</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9955519 - Disclosure - Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/IntangibleAssetsTables</Role>
      <ShortName>Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://frphdev.com/role/IntangibleAssets</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9955520 - Disclosure - Altman Logistics Platform Acquisition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/AltmanLogisticsPlatformAcquisitionTables</Role>
      <ShortName>Altman Logistics Platform Acquisition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://frphdev.com/role/AltmanLogisticsPlatformAcquisition</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9955521 - Disclosure - Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/AccountingPoliciesDetails</Role>
      <ShortName>Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://frphdev.com/role/AccountingPoliciesPolicies</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9955522 - Disclosure - Investments in Joint Ventures - Schedule of Investments in Unconsolidated Joint Ventures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/InvestmentsinJointVenturesScheduleofInvestmentsinUnconsolidatedJointVenturesDetails</Role>
      <ShortName>Investments in Joint Ventures - Schedule of Investments in Unconsolidated Joint Ventures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9955523 - Disclosure - Investments in Joint Ventures - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/InvestmentsinJointVenturesNarrativeDetails</Role>
      <ShortName>Investments in Joint Ventures - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9955524 - Disclosure - Investments in Joint Ventures - Schedule of Investments in Multifamily Joint Ventures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/InvestmentsinJointVenturesScheduleofInvestmentsinMultifamilyJointVenturesDetails</Role>
      <ShortName>Investments in Joint Ventures - Schedule of Investments in Multifamily Joint Ventures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9955525 - Disclosure - Investments in Joint Ventures - Schedule of Investments in Joint Ventures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/InvestmentsinJointVenturesScheduleofInvestmentsinJointVenturesDetails</Role>
      <ShortName>Investments in Joint Ventures - Schedule of Investments in Joint Ventures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9955526 - Disclosure - Investments in Joint Ventures - Schedule of Bryant Street Partnerships (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/InvestmentsinJointVenturesScheduleofBryantStreetPartnershipsDetails</Role>
      <ShortName>Investments in Joint Ventures - Schedule of Bryant Street Partnerships (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9955527 - Disclosure - Investments in Joint Ventures - Schedule of Greenville Partnerships (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/InvestmentsinJointVenturesScheduleofGreenvillePartnershipsDetails</Role>
      <ShortName>Investments in Joint Ventures - Schedule of Greenville Partnerships (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>9955528 - Disclosure - Investments in Joint Ventures - Schedule of Verge Partnership (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/InvestmentsinJointVenturesScheduleofVergePartnershipDetails</Role>
      <ShortName>Investments in Joint Ventures - Schedule of Verge Partnership (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>9955529 - Disclosure - Related Party Arrangements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/RelatedPartyArrangementsDetails</Role>
      <ShortName>Related Party Arrangements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://frphdev.com/role/RelatedPartyArrangements</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>9955530 - Disclosure - Debt - Schedule of Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/DebtScheduleofDebtDetails</Role>
      <ShortName>Debt - Schedule of Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>9955531 - Disclosure - Debt - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/DebtNarrativeDetails</Role>
      <ShortName>Debt - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>9955532 - Disclosure - Leases - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/LeasesNarrativeDetails</Role>
      <ShortName>Leases - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>9955533 - Disclosure - Leases - Schedule of Carrying Value of Property (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/LeasesScheduleofCarryingValueofPropertyDetails</Role>
      <ShortName>Leases - Schedule of Carrying Value of Property (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>9955534 - Disclosure - Earnings per Share - Schedule of Basic and diluted earnings per common share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/EarningsperShareScheduleofBasicanddilutedearningspercommonshareDetails</Role>
      <ShortName>Earnings per Share - Schedule of Basic and diluted earnings per common share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>9955535 - Disclosure - Earnings per Share - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/EarningsperShareNarrativeDetails</Role>
      <ShortName>Earnings per Share - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>9955536 - Disclosure - Stock-Based Compensation Plans - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/StockBasedCompensationPlansNarrativeDetails</Role>
      <ShortName>Stock-Based Compensation Plans - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>9955537 - Disclosure - Stock-Based Compensation Plans - Schedule of Stock Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/StockBasedCompensationPlansScheduleofStockCompensationExpenseDetails</Role>
      <ShortName>Stock-Based Compensation Plans - Schedule of Stock Compensation Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>9955538 - Disclosure - Stock-Based Compensation Plans - Schedule of Changes in Outstanding Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/StockBasedCompensationPlansScheduleofChangesinOutstandingOptionsDetails</Role>
      <ShortName>Stock-Based Compensation Plans - Schedule of Changes in Outstanding Options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>9955539 - Disclosure - Stock-Based Compensation Plans - Schedule of Stock Options Outstanding (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/StockBasedCompensationPlansScheduleofStockOptionsOutstandingDetails</Role>
      <ShortName>Stock-Based Compensation Plans - Schedule of Stock Options Outstanding (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>9955540 - Disclosure - Stock-Based Compensation Plans - Schedule of Changes in Restricted Stock Awards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/StockBasedCompensationPlansScheduleofChangesinRestrictedStockAwardsDetails</Role>
      <ShortName>Stock-Based Compensation Plans - Schedule of Changes in Restricted Stock Awards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>9955541 - Disclosure - Income Taxes - Schedule of Provision for Income Tax Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/IncomeTaxesScheduleofProvisionforIncomeTaxExpenseDetails</Role>
      <ShortName>Income Taxes - Schedule of Provision for Income Tax Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>9955542 - Disclosure - Income Taxes - Schedule of Provision for Income Tax Benefit (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/IncomeTaxesScheduleofProvisionforIncomeTaxBenefitDetails</Role>
      <ShortName>Income Taxes - Schedule of Provision for Income Tax Benefit (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>9955543 - Disclosure - Income Taxes - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/IncomeTaxesNarrativeDetails</Role>
      <ShortName>Income Taxes - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>9955544 - Disclosure - Income Taxes - Schedule Of Income Tax Reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/IncomeTaxesScheduleOfIncomeTaxReconciliationDetails</Role>
      <ShortName>Income Taxes - Schedule Of Income Tax Reconciliation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>9955545 - Disclosure - Income Taxes - Schedule of Deferred Tax Assets and Deferred Tax Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/IncomeTaxesScheduleofDeferredTaxAssetsandDeferredTaxLiabilitiesDetails</Role>
      <ShortName>Income Taxes - Schedule of Deferred Tax Assets and Deferred Tax Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>9955546 - Disclosure - Income Taxes - Schedule Of NOL Carryovers (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/IncomeTaxesScheduleOfNOLCarryoversDetails</Role>
      <ShortName>Income Taxes - Schedule Of NOL Carryovers (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>9955547 - Disclosure - Employee Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/EmployeeBenefitsDetails</Role>
      <ShortName>Employee Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://frphdev.com/role/EmployeeBenefits</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>9955548 - Disclosure - Business Segments - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/BusinessSegmentsNarrativeDetails</Role>
      <ShortName>Business Segments - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>9955549 - Disclosure - Business Segments - Schedule of Operating Results and Certain Other Financial Data for Business Segments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/BusinessSegmentsScheduleofOperatingResultsandCertainOtherFinancialDataforBusinessSegmentsDetails</Role>
      <ShortName>Business Segments - Schedule of Operating Results and Certain Other Financial Data for Business Segments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>9955550 - Disclosure - Business segments - Schedule of Identifiable Net Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/BusinesssegmentsScheduleofIdentifiableNetAssetsDetails</Role>
      <ShortName>Business segments - Schedule of Identifiable Net Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>9955551 - Disclosure - Fair Value Measurements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/FairValueMeasurementsDetails</Role>
      <ShortName>Fair Value Measurements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://frphdev.com/role/FairValueMeasurements</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>9955552 - Disclosure - Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/ContingenciesDetails</Role>
      <ShortName>Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://frphdev.com/role/Contingencies</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>9955553 - Disclosure - Commitments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/CommitmentsDetails</Role>
      <ShortName>Commitments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://frphdev.com/role/Commitments</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>9955554 - Disclosure - Concentrations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/ConcentrationsDetails</Role>
      <ShortName>Concentrations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://frphdev.com/role/Concentrations</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>9955555 - Disclosure - Intangible Assets - Schedule of Acquired Lease Intangibles (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/IntangibleAssetsScheduleofAcquiredLeaseIntangiblesDetails</Role>
      <ShortName>Intangible Assets - Schedule of Acquired Lease Intangibles (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>9955556 - Disclosure - Intangible Assets - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/IntangibleAssetsNarrativeDetails</Role>
      <ShortName>Intangible Assets - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>9955557 - Disclosure - Intangible Assets - Schedule of Estimated Aggregate Amortization from Acquired Lease Intangibles (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/IntangibleAssetsScheduleofEstimatedAggregateAmortizationfromAcquiredLeaseIntangiblesDetails</Role>
      <ShortName>Intangible Assets - Schedule of Estimated Aggregate Amortization from Acquired Lease Intangibles (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>9955558 - Disclosure - Altman Logistics Platform Acquisition - Schedule of Business Combination (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/AltmanLogisticsPlatformAcquisitionScheduleofBusinessCombinationDetails</Role>
      <ShortName>Altman Logistics Platform Acquisition - Schedule of Business Combination (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>9955559 - Disclosure - Altman Logistics Platform Acquisition - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/AltmanLogisticsPlatformAcquisitionNarrativeDetails</Role>
      <ShortName>Altman Logistics Platform Acquisition - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>9955560 - Disclosure - Altman Logistics Platform Acquisition - Schedule of Business Combination, Recognized Asset Acquired and Liability Assumed (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/AltmanLogisticsPlatformAcquisitionScheduleofBusinessCombinationRecognizedAssetAcquiredandLiabilityAssumedDetails</Role>
      <ShortName>Altman Logistics Platform Acquisition - Schedule of Business Combination, Recognized Asset Acquired and Liability Assumed (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="frph-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>9955561 - Disclosure - Contributions from partner (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://frphdev.com/role/ContributionsfrompartnerDetails</Role>
      <ShortName>Contributions from partner (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://frphdev.com/role/Contributionsfrompartner</ParentRole>
      <Position>82</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-K" isDefinitelyFs="true" isUsgaap="true" original="frph-20251231.htm">frph-20251231.htm</File>
    <File>frph-20251231.xsd</File>
    <File>frph-20251231_cal.xml</File>
    <File>frph-20251231_def.xml</File>
    <File>frph-20251231_lab.xml</File>
    <File>frph-20251231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>frph-20251231_g1.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="1250">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="15">http://xbrl.sec.gov/cyd/2025</BaseTaxonomy>
    <BaseTaxonomy items="39">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="5">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
