Revenues (Schedule of Rental Revenues) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues [Abstract]
Base rents	$ 22,116,000	$ 24,015,000
Expense recoveries	7,546,000	8,348,000
Percentage rent	175,000	565,000
Straight-line rents	101,000	131,000
Amortization of intangible lease liabilities, net	269,000	277,000
Total rents	$ 30,207,000	$ 33,336,000