Investments in Joint Ventures - Schedule of Investments in Multifamily 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
Buzzard Point Sponsor, LLC
Schedule of Equity Method Investments [Line Items]
Investments in real estate, net	0	0
Cash and restricted cash	0	0
Unrealized rents & receivables	0	0
Deferred costs	5,072	4,892
Total assets	5,072	4,892
Secured notes payable	0	0
Other liabilities	0	0
Capital – FRP	2,536	2,446
Capital – Third Parties	2,536	2,446
Total liabilities and equity	5,072	4,892
Bryant Street Partnerships
Schedule of Equity Method Investments [Line Items]
Investments in real estate, net	175,779	180,928
Cash and restricted cash	4,071	5,348
Unrealized rents & receivables	6,956	6,708
Deferred costs	1,394	1,406
Total assets	188,200	194,390
Secured notes payable	108,512	108,084
Other liabilities	2,570	3,126
Capital – FRP	58,338	63,241
Capital – Third Parties	18,780	19,939
Total liabilities and equity	188,200	194,390
Estero Partnership
Schedule of Equity Method Investments [Line Items]
Investments in real estate, net	48,532	40,733
Cash and restricted cash	6,725	613
Unrealized rents & receivables	0	0
Deferred costs	0	0
Total assets	55,257	41,346
Secured notes payable	8,000	16,000
Other liabilities	427	856
Capital – FRP	6,828	3,600
Capital – Third Parties	40,002	20,890
Total liabilities and equity	55,257	41,346
Verge Partnership
Schedule of Equity Method Investments [Line Items]
Investments in real estate, net	120,932	124,010
Cash and restricted cash	1,509	2,001
Unrealized rents & receivables	217	250
Deferred costs	182	138
Total assets	122,840	126,399
Secured notes payable	68,434	68,242
Other liabilities	1,085	1,209
Capital – FRP	32,648	34,874
Capital – Third Parties	20,673	22,074
Total liabilities and equity	122,840	126,399
Greenville Partnerships
Schedule of Equity Method Investments [Line Items]
Investments in real estate, net	103,252	94,020
Cash and restricted cash	4,597	3,104
Unrealized rents & receivables	76	258
Deferred costs	119	195
Total assets	108,044	97,577
Secured notes payable	80,034	79,829
Other liabilities	5,016	2,158
Capital – FRP	10,898	4,870
Capital – Third Parties	12,096	10,720
Total liabilities and equity	108,044	97,577
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