Accounts Receivable, Net (Schedule Of Accounts Receivable) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Straight line rent write off	$ 12,500	$ 2,400
Straight-Line Rent Receivable	63,268		$ 73,382
Total	72,537		86,858
Tenants [Member]
Total	7,198		11,373
Non-Tenants [Member]
Carrying amounts of accounts receivable	2,071		$ 2,103
Trade Accounts Receivable [Member]
Straight line rent write off	4,500
Ground Lease Arrangement [Member]
Straight line rent write off	8,000
Straight-Line Rent Receivable	$ 0	$ 24,454