Revenues (Schedule of Rental Revenues) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues [Abstract]
Base rents	$ 22,657,000	$ 23,233,000	$ 70,249,000	$ 71,776,000
Expense recoveries	7,385,000	6,812,000	23,185,000	21,695,000
Percentage rent	78,000	823,000	1,004,000	1,152,000
Straight-line rents	7,000	(277,000)	366,000	(1,222,000)
Amortization of intangible lease liabilities, net	268,000	299,000	807,000	1,065,000
Total rents	$ 30,395,000	$ 30,890,000	$ 95,611,000	$ 94,466,000