Real Estate Facilities (Activity In Real Estate Facilities) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Property, Plant and Equipment [Line Items]
Balances			$ 1,985,065
Capital expenditures, net			25,685
Depreciation and amortization	$ (27,025)	$ (28,295)	(53,258)	$ (56,736)
Transfer to properties held for disposition			148
Balances	1,957,640		1,957,640
Land [Member]
Property, Plant and Equipment [Line Items]
Balances			793,569
Balances	793,569		793,569
Building And Improvements [Member]
Property, Plant and Equipment [Line Items]
Balances			2,182,993
Capital expenditures, net			25,685
Disposals			(8,254)
Transfer to properties held for disposition			(330)
Balances	2,200,094		2,200,094
Accumulated Depreciation [Member]
Property, Plant and Equipment [Line Items]
Balances			(991,497)
Disposals			8,254
Depreciation and amortization			(53,258)
Transfer to properties held for disposition			478
Balances	$ (1,036,023)		$ (1,036,023)