Accounts Receivable, Net (Schedule Of Accounts Receivable) (Details) - USD ($) $ in Thousands	Jun. 30, 2019		Jan. 01, 2019	Dec. 31, 2018	Mar. 31, 2018
Revenue Bond Receivable	$ 0			$ 11,500
Straight-Line Rent Receivable	95,449	[1]		73,332
Total	108,433			98,369
Tenants [Member]
Total	6,601			12,158
Non-Tenants [Member]
Carrying amounts of accounts receivable	6,383			$ 1,379
Ground Lease Arrangement [Member]
Straight-Line Rent Receivable	$ 24,843		$ 24,454		$ 0

[1] At June 30, 2019, includes $24.8 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.