Impairments - Real Estate (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Impaired Long-Lived Assets Held and Used [Line Items]
Asset Impairment Charges	$ 8,663	$ 431	$ 9,043	$ 431
Segment, Continuing Operations [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Asset Impairment Charges	7,261	0	7,296	0
Segment, Discontinued Operations [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Asset Impairment Charges	$ 1,402	$ 431	$ 1,747	$ 431