Notes Receivable and Current Expected Credit Losses (Schedule of Interest on the Mezzanine Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	$ 3,490	$ 3,766	$ 10,410	$ 14,628
Mezzanine loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	3,372	3,657	10,070	14,307
Other notes receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	118	109	340	321
City Park 2 | Mezzanine loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	329	0	554	0
Interlock Commercial | Mezzanine loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	2,363	3,260	7,550	9,644
Nexton Multifamily | Mezzanine loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	680	397	1,966	658
Solis Apartments at Interlock | Mezzanine loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	$ 0	0	$ 0	4,005
Payment for debt extinguishment		$ 2,400		$ 2,400