Notes Receivable - Schedule of Notes Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 129,726	$ 123,556
Notes Receivable | ABC Land and Development, Inc.
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 4,408	4,408
Interest Rate	9.50%
Notes Receivable | ABC Paradise, LLC
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 1,210	1,210
Interest Rate	9.50%
Notes Receivable | Autumn Breeze
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 2,486	1,867
Interest Rate	5.00%
Notes Receivable | Bellwether Ridge
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 3,967	3,858
Interest Rate	5.00%
Notes Receivable | Forest Pines
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 6,472	2,869
Interest Rate	5.00%
Notes Receivable | Lake Wales
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 3,000	3,000
Interest Rate	9.50%
Notes Receivable | Legacy Pleasant Grove
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 496	496
Interest Rate	12.00%
Notes Receivable | McKinney Ranch
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 4,554	4,554
Interest Rate	6.00%
Notes Receivable | One Realco Land Holding, Inc.
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 1,728	1,728
Interest Rate	9.50%
Notes Receivable | Parc at Ingleside
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 3,700	2,523
Interest Rate	5.00%
Notes Receivable | Parc at Opelika
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 2,305	0
Interest Rate	10.00%
Notes Receivable | Parc at Windmill Farms
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 7,830	7,803
Interest Rate	5.00%
Ownership interest if note converted	100.00%
Notes Receivable | Phillips Foundation for Better Living, Inc.
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 0	61
Interest Rate	12.00%
Notes Receivable | Phillips Foundation for Better Living, Inc.
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 813	0
Interest Rate	12.00%
Notes Receivable | Plum Tree
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 1,537	857
Interest Rate	5.00%
Notes Receivable | Riverview on the Park Land, LLC
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 1,045	1,045
Interest Rate	9.50%
Notes Receivable | RNC Portfolio, Inc.
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 0	8,853
Interest Rate	5.00%
Notes Receivable | Spartan Land
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 5,907	5,907
Interest Rate	12.00%
Notes Receivable | Spyglass of Ennis
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 5,319	5,360
Interest Rate	5.00%
Notes Receivable | Steeple Crest
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 6,498	6,498
Interest Rate	5.00%
Notes Receivable | Unified Housing Foundation Inc., Maturing June 30, 2023 A
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 2,881	2,880
Interest Rate	12.00%
Notes Receivable | Unified Housing Foundation Inc., Maturing June 30, 2023 B
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 212	212
Interest Rate	12.00%
Notes Receivable | Unified Housing Foundation Inc., Maturing June 30, 2023 C
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 6,831	6,831
Interest Rate	12.00%
Notes Receivable | Unified Housing Foundation Inc., Maturing June 30, 2023 D
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 10,401	10,896
Interest Rate	12.00%
Notes Receivable | Unified Housing Foundation Inc., Maturing March 31, 2022
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 10,096	10,096
Interest Rate	12.00%
Notes Receivable | Unified Housing Foundation Inc., Maturing March 31, 2023
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 6,990	6,990
Interest Rate	12.00%
Notes Receivable | Unified Housing Foundation Inc., Maturing May 31, 2023
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 3,615	3,615
Interest Rate	12.00%
Notes Receivable | Unified Housing Foundation Inc., Maturing December 31, 2032
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 17,172	19,139
Interest Rate	12.00%
Notes Receivable | Unified Housing Foundation Inc., Maturing March 31, 2024
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 6,521	0
Interest Rate	12.00%
Notes Receivable | Unified Housing Foundation Inc., Maturing April 30, 2024
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 1,549	0
Interest Rate	12.00%
Notes Receivable | Unified Housing Foundation Inc., Maturing June 30, 2024
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 183	$ 0
Interest Rate	12.00%