Investments in Joint Ventures - Schedule of Investments in Joint Ventures (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Schedule of Equity Method Investments [Line Items]
Total assets	$ 731,260	$ 728,485
Capital – Third Parties	427,718	423,103
Total liabilities and equity	731,260	728,485
Brooksville Quarry, LLC
Schedule of Equity Method Investments [Line Items]
Investments in real estate, net	14,351	14,354
Cash and restricted cash	136	143
Unrealized rents & receivables	0	0
Deferred costs	2	1
Total assets	14,489	14,498
Secured notes payable	0	0
Other liabilities	65	0
Capital – FRP	7,541	7,579
Capital – Third Parties	6,883	6,919
Total liabilities and equity	14,489	14,498
BC FRP Realty, LLC
Schedule of Equity Method Investments [Line Items]
Investments in real estate, net	21,467	20,956
Cash and restricted cash	1,317	144
Unrealized rents & receivables	483	517
Deferred costs	380	313
Total assets	23,647	21,930
Secured notes payable	13,878	10,315
Other liabilities	285	285
Capital – FRP	4,742	5,665
Capital – Third Parties	4,742	5,665
Total liabilities and equity	23,647	21,930
Lending ventures
Schedule of Equity Method Investments [Line Items]
Investments in real estate, net	10,339	16,007
Cash and restricted cash	0	0
Unrealized rents & receivables	0	0
Deferred costs	0	0
Total assets	10,339	16,007
Secured notes payable	(3,596)	(10,157)
Other liabilities	187	0
Capital – FRP	13,748	26,164
Capital – Third Parties	0	0
Total liabilities and equity	10,339	16,007
Total Multifamily JV’s
Schedule of Equity Method Investments [Line Items]
Investments in real estate, net	448,495	439,691
Cash and restricted cash	16,902	11,066
Unrealized rents & receivables	7,249	7,216
Deferred costs	6,767	6,631
Total assets	479,413	464,604
Secured notes payable	264,980	272,155
Other liabilities	9,098	7,349
Capital – FRP	111,248	109,031
Capital – Third Parties	94,087	76,069
Total liabilities and equity	479,413	464,604
Grand Total
Schedule of Equity Method Investments [Line Items]
Investments in real estate, net	494,652	491,008
Cash and restricted cash	18,355	11,353
Unrealized rents & receivables	7,732	7,733
Deferred costs	7,149	6,945
Total assets	527,888	517,039
Secured notes payable	275,262	272,313
Other liabilities	9,635	7,634
Capital – FRP	137,279	148,439
Capital – Third Parties	105,712	88,653
Total liabilities and equity	$ 527,888	$ 517,039