Revenues (Schedule of Rental Revenues) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues [Abstract]
Base rents	$ 23,574,000	$ 22,781,000	$ 47,591,000	$ 48,543,000
Expense recoveries	7,452,000	6,328,000	15,800,000	14,883,000
Percentage rent	362,000	33,000	927,000	329,000
Straight-line rents	229,000	(988,000)	359,000	(945,000)
Amortization of intangible lease liabilities, net	263,000	307,000	539,000	766,000
Total rents	$ 31,880,000	$ 28,461,000	$ 65,216,000	$ 63,576,000