Discontinued Operations (Operating Results Of Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2009
Income Statement, Balance Sheet And Additional Disclosures By Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues	$ 4,124	$ 10,293
Operating and maintenance	2,889	6,695
Interest expense, including prepayment penalties	802	5,546
Depreciation and amortization	840	2,357
Total expenses	4,531	14,598
Income (loss) from discontinued operations	(407)	(4,305)
Rental Income [Member]
Income Statement, Balance Sheet And Additional Disclosures By Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues	3,441	9,710
Property Other Income [Member]
Income Statement, Balance Sheet And Additional Disclosures By Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues	14	583
Other Income [Member]
Income Statement, Balance Sheet And Additional Disclosures By Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues	$ 669