Real Estate (Schedule of Fixed and Variable Lease Payments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Lease Income	$ 67,043	$ 77,821	$ 210,143	$ 232,266
Fixed Lease Escalation [Member]
Lease Income	59,027	67,592	188,008	206,179
Variable Lease Escalation [Member]
Lease Income	1,288	1,386	3,201	4,151
Straight Line Rent Income [Member]
Lease Income	3,798	5,086	12,189	15,481
Escrow Funds Received From Tenants [Member]
Lease Income	3,182	4,007	7,519	7,190
Lease Incentives
Amortization	$ (252)	$ (250)	$ (774)	$ (735)