Notes Receivable and Current Expected Credit Losses - Schedule of Interest Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Notes Receivable
Interest income	$ 15,103	$ 16,978	$ 18,457
Mezzanine Loan
Notes Receivable
Interest income	14,176	16,461	18,026
Other interest income
Notes Receivable
Interest income	927	517	431
Nexton Multifamily
Notes Receivable
Prepayment premium		2,700
Nexton Multifamily | Mezzanine Loan
Notes Receivable
Interest income	0	5,348	1,252
Solis Apartments at Interlock
Notes Receivable
Prepayment premium			2,400
Solis Apartments at Interlock | Mezzanine Loan
Notes Receivable
Interest income	0	0	4,005
Solis City Park II | Mezzanine Loan
Notes Receivable
Interest income	2,887	1,038	0
Solis Gainesville II | Mezzanine Loan
Notes Receivable
Interest income	2,757	205	0
Solis Kennesaw | Mezzanine Loan
Notes Receivable
Interest income	2,810	0	0
Solis Peachtree Corners | Mezzanine Loan
Notes Receivable
Interest income	1,472	0	0
The Allure at Edinburgh | Mezzanine Loan
Notes Receivable
Interest income	603	0	0
The Interlock | Mezzanine Loan
Notes Receivable
Interest income	$ 3,647	$ 9,870	$ 12,769