Accounts Receivable, Net (Schedule Of Accounts Receivable) (Details) - USD ($) $ in Thousands	Sep. 30, 2019		Dec. 31, 2018	Sep. 30, 2018
Revenue Bond Receivable	$ 0		$ 11,500
Straight-Line Rent Receivable	89,361	[1]	73,332
Total	99,190		98,369
Tenants [Member]
Total	4,523		12,158
Non-Tenants [Member]
Carrying amounts of accounts receivable	5,306		$ 1,379
Ground Lease Arrangement [Member]
Straight-Line Rent Receivable	24,454			$ 0
direct share purchase plan [Member]
Carrying amounts of accounts receivable	$ 3,400

[1] At September 30, 2019, includes $25.2 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.