Discontinued Operations (Operating Results Relating To Assets Disposed) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rental revenue	$ 0	$ 4,003
Tenant reimbursements	0	2,346
Mortgage and other financing income	0	4
Total revenue	0	6,353
Property operating expense	5	2,948
Other expense	34	55
Costs associated with loan refinancing or payoff	0	225
Interest expense, net	(11)	21
Impairment charges	801	1,800
Depreciation and amortization	0	1,998
Loss before gain on sale or acquisition of real estate	(829)	(694)
Gain on sale or acquisition of real estate	282	18,293
Net income	(547)	17,599
Toronto Dundas Square and Pope Valley Winery [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale or acquisition of real estate	$ 282