Investments in unconsolidated joint ventures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Total investments	$ 152,587		$ 152,587		$ 140,525
Total assets of the partnership	699,896		699,896		701,084
Profit (loss) of the partnership	492	$ 582	898	$ 986
Share of profit (loss) of the partnership	(4,047)	$ (1,766)	(7,672)	$ (3,370)
Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Total assets of the partnership	$ 517,931		517,931		510,640
Profit (loss) of the partnership			(13,133)		(3,437)
Real Estate Partnership Net Income Loss [Member]
Schedule of Equity Method Investments [Line Items]
Share of profit (loss) of the partnership			$ (7,672)		$ (5,721)
Brooksville Quarry L L C [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%		50.00%		50.00%
Total investments	$ 7,496		$ 7,496		$ 7,522
Profit (loss) of the partnership			(48)		(84)
Share of profit (loss) of the partnership			(24)		(42)
Brooksville Quarry L L C [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Total assets of the partnership	$ 14,367		$ 14,367		$ 14,374
B C F R P Realty L L C [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%		50.00%		50.00%
Total investments	$ 5,180		$ 5,180		$ 5,453
Profit (loss) of the partnership			(350)		(358)
Share of profit (loss) of the partnership			(175)		(175)
B C F R P Realty L L C [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Total assets of the partnership	$ 21,959		$ 21,959		$ 21,825
Buzzard Point Sponsor Partnership [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%		50.00%		50.00%
Total investments	$ 2,150		$ 2,150		$ 1,453
Profit (loss) of the partnership			0		0
Share of profit (loss) of the partnership			0		0
Buzzard Point Sponsor Partnership [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Total assets of the partnership	$ 4,300		$ 4,300		$ 2,906
Bryant Street Partnerships [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	61.36%		61.36%		61.36%
Total investments	$ 61,448		$ 61,448		$ 55,561
Profit (loss) of the partnership			(5,296)		(10,339)
Share of profit (loss) of the partnership			(3,348)		(6,829)
Bryant Street Partnerships [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Total assets of the partnership	196,532		196,532		199,774
Lending Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Total investments	22,033		22,033		16,476
Profit (loss) of the partnership			0		0
Share of profit (loss) of the partnership			0		0
Lending Ventures [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Total assets of the partnership	$ 11,448		$ 11,448		$ 5,577
Estero Partnership [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	16.00%		16.00%		16.00%
Total investments	$ 3,600		$ 3,600		$ 3,600
Profit (loss) of the partnership			0		0
Estero Partnership [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Total assets of the partnership	$ 38,541		$ 38,541		$ 38,505
Verge [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	61.37%		61.37%		61.37%
Total investments	$ 38,626		$ 38,626		$ 38,471
Profit (loss) of the partnership			(5,383)		(1,841)
Share of profit (loss) of the partnership			(3,303)		(1,129)
Verge [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Total assets of the partnership	$ 132,101		$ 132,101		$ 131,128
Greenville Partnerships [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	40.00%		40.00%		40.00%
Total investments	$ 12,054		$ 12,054		$ 11,989
Profit (loss) of the partnership			(2,056)		(1,775)
Share of profit (loss) of the partnership			(822)		(710)
Greenville Partnerships [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Total assets of the partnership	$ 98,683		$ 98,683		$ 96,551
D S T Hickory Creek [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage					26.65%
Total investments					$ 0
Profit (loss) of the partnership					10,960
Share of profit (loss) of the partnership					3,164
D S T Hickory Creek [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Total assets of the partnership					$ 0