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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) |  |

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