Investments in Joint Ventures - Schedule of Investments in Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
The Company's Total Investment	$ 157,272		$ 157,272
Total Assets of The Partnership	726,918		726,918		$ 709,166
Profit (Loss) Of the Partnership	1,379	$ 1,099	4,773	$ 1,997
The Company's Share of Profit (Loss) of the Partnership	(2,839)	$ (2,913)	(8,582)	$ (10,585)
Total Assets of The Partnership
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	523,384		523,384
Profit (Loss) Of the Partnership			(13,460)
Brooksville Quarry, LLC
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	14,432		14,432		14,439
Profit (Loss) Of the Partnership			(70)
BC FRP Realty, LLC
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	21,996		21,996		22,454
Profit (Loss) Of the Partnership			(728)
Buzzard Point Sponsor, LLC
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	4,848		4,848		4,652
Profit (Loss) Of the Partnership			0
Bryant Street Partnerships
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	198,821		198,821		202,634
Profit (Loss) Of the Partnership			(6,748)
Lending ventures
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	16,929		16,929		17,117
Profit (Loss) Of the Partnership			0
Estero Partnership
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	38,520		38,520		38,652
Profit (Loss) Of the Partnership			0
The Verge Partnership
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	127,103		127,103		130,173
Profit (Loss) Of the Partnership			(3,969)
Greenville Partnerships
Schedule of Equity Method Investments [Line Items]
Total Assets of The Partnership	$ 100,735		100,735		$ 98,223
Profit (Loss) Of the Partnership			(1,945)
The Company's Share of Profit (Loss) of the Partnership
Schedule of Equity Method Investments [Line Items]
The Company's Share of Profit (Loss) of the Partnership			$ (8,582)
Brooksville Quarry, LLC
Schedule of Equity Method Investments [Line Items]
FRP Ownership	50.00%		50.00%
The Company's Total Investment	$ 7,514		$ 7,514
The Company's Share of Profit (Loss) of the Partnership			$ (35)
BC FRP Realty, LLC
Schedule of Equity Method Investments [Line Items]
FRP Ownership	50.00%		50.00%
The Company's Total Investment	$ 5,484		$ 5,484
The Company's Share of Profit (Loss) of the Partnership			$ (364)
Buzzard Point Sponsor, LLC
Schedule of Equity Method Investments [Line Items]
FRP Ownership	50.00%		50.00%
The Company's Total Investment	$ 2,424		$ 2,424
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%		61.36%
The Company's Total Investment	$ 66,747		$ 66,747
The Company's Share of Profit (Loss) of the Partnership			(4,969)
Lending ventures
Schedule of Equity Method Investments [Line Items]
The Company's Total Investment	$ 27,374		27,374
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	$ 3,683		$ 3,683
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	$ 37,849		$ 37,849
The Company's Share of Profit (Loss) of the Partnership			$ (2,436)
Greenville Partnerships
Schedule of Equity Method Investments [Line Items]
FRP Ownership	40.00%		40.00%
The Company's Total Investment	$ 6,197		$ 6,197
The Company's Share of Profit (Loss) of the Partnership			$ (778)