Other Liabilities (Summary Of Other Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Other Liabilities [Abstract]
Security deposit payable	$ 164	$ 137
Other	40
Other current liabilities	204	137
Foreign withholding taxes	6,346	6,212
Straight-line rent liability	8,215	8,067
Lease liability	5,800	5,746
Environmental reserve	1,656	1,656
Accrued pension	4,466	4,289
Interest rate swap	6,219	4,722
Acquired leases	2,410	2,742
Other payable	1,191	1,243
Other	652	962
Other liabilities	$ 36,955	$ 35,639