Accounts Receivable, Net (Schedule Of Accounts Receivable) (Details) - USD ($) $ in Thousands	Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017
Revenue Bond Receivable	$ 0		$ 11,500
Straight-Line Rent Receivable	73,382	[1]	73,332
Total	86,858		98,369
Tenants [Member]
Total	11,373		12,158
Non-Tenants [Member]
Accounts receivable, gross	2,103		1,379
Ground Lease Arrangement [Member]
Straight-Line Rent Receivable	$ 24,454		$ 0	$ 0

[1] (1) At December 31, 2019, includes $24.6 million in sub-lessor straight-line rent receivables. Sub-lessor straight-line receivables relate to the Company's operating ground leases. The Company's tenants, who are generally sub-tenants under these ground leases, are responsible for paying the rent under these leases. See Note 16 for information related to the Company's leases.