Investments in Joint Ventures - Schedule of Investments in Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	$ 722,782		$ 722,782		$ 728,485
Profit (Loss) Of the Partnership	624	$ 2,059	2,258	$ 3,394
The Company's Share of Profit (Loss) of the Partnership	(2,379)	$ (2,724)	(4,410)	$ (5,743)
Total Assets of The Partnership
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	512,937		512,937
Profit (Loss) Of the Partnership			(6,654)
Brooksville Quarry, LLC
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	14,492		14,492		14,498
Profit (Loss) Of the Partnership			(46)
BC FRP Realty, LLC
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	23,438		23,438		21,930
Profit (Loss) Of the Partnership			312
Buzzard Point Sponsor, LLC
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	4,946		4,946		4,892
Profit (Loss) Of the Partnership			0
Bryant Street Partnerships
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	190,288		190,288		194,390
Profit (Loss) Of the Partnership			(3,437)
Lending ventures
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	11,292		11,292		16,007
Profit (Loss) Of the Partnership			0
Estero Partnership
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	42,367		42,367		41,346
Profit (Loss) Of the Partnership			0
The Verge Partnership
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	124,630		124,630		126,399
Profit (Loss) Of the Partnership			(1,984)
Greenville Partnerships
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	101,484		101,484		$ 97,577
Profit (Loss) Of the Partnership			(1,499)
The Company's Share of Profit (Loss) of the Partnership
Schedule of Equity Method Investments [Line Items]
The Company's Total Investment	$ 139,098		139,098
The Company's Share of Profit (Loss) of the Partnership			$ (4,410)
Brooksville Quarry, LLC
Schedule of Equity Method Investments [Line Items]
FRP Ownership	50.00%		50.00%
The Company's Total Investment	$ 7,554		$ 7,554
The Company's Share of Profit (Loss) of the Partnership			$ (23)
BC FRP Realty, LLC
Schedule of Equity Method Investments [Line Items]
FRP Ownership	50.00%		50.00%
The Company's Total Investment	$ 4,631		$ 4,631
The Company's Share of Profit (Loss) of the Partnership			$ 156
Buzzard Point Sponsor, LLC
Schedule of Equity Method Investments [Line Items]
FRP Ownership	50.00%		50.00%
The Company's Total Investment	$ 2,473		$ 2,473
The Company's Share of Profit (Loss) of the Partnership			$ 0
Bryant Street Partnerships
Schedule of Equity Method Investments [Line Items]
FRP Ownership	72.10%		72.10%
The Company's Total Investment	$ 62,269		$ 62,269
The Company's Share of Profit (Loss) of the Partnership			(2,726)
Lending ventures
Schedule of Equity Method Investments [Line Items]
The Company's Total Investment	$ 14,814		14,814
The Company's Share of Profit (Loss) of the Partnership			$ 0
Estero Partnership
Schedule of Equity Method Investments [Line Items]
FRP Ownership	16.00%		16.00%
The Company's Total Investment	$ 3,765		$ 3,765
The Company's Share of Profit (Loss) of the Partnership			$ 0
The Verge Partnership
Schedule of Equity Method Investments [Line Items]
FRP Ownership	61.37%		61.37%
The Company's Total Investment	$ 35,930		$ 35,930
The Company's Share of Profit (Loss) of the Partnership			$ (1,217)
Greenville Partnerships
Schedule of Equity Method Investments [Line Items]
FRP Ownership	53.09%		53.09%
The Company's Total Investment	$ 7,662		$ 7,662
The Company's Share of Profit (Loss) of the Partnership			$ (600)