Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Non-cash investing and financing transactions:
Mortgage loan receivable reserve withheld at origination (Footnote 5)	$ 298
Preferred return reserve related to investment in unconsolidated joint ventures (Footnote 6)	2,324	$ 2,878
Notes receivable reserve withheld at origination (Footnote 7)	353
Reclassification of notes receivable to lease incentives (Footnote 7)		$ 300	$ 200
Change in fair value of interest rate swaps (Footnote 9 )	$ 172