Other Liabilities (Summary Of Other Liabilities Including Pension) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016		Aug. 29, 2014
Other Liabilities [Abstract]
Liability for demolition costs	$ 2,972	$ 5,914
Lease liability	5,900	5,900
Accrued pension	2,565	2,223
Security deposit payable	91	77
Other	61	17
Other current liabilities	11,589	14,131	[1]
Straight-line rent liability	12,647	12,413
Accrued pension	5,480	5,732		$ 7,500
Lease make-good provision	5,473	5,146
Environmental reserve	1,656	1,656
Interest rate swap	4	58
Deferred revenue - real estate	32	4,398
Acquired leases	229	267
Other	482	495
Other liabilities	$ 26,003	$ 30,165	[1]

[1] Certain 2016 balances have been reclassified to conform to the 2017 presentation (see Note 2 - Summary of Significant Accounting Policies - Reclassifications).