Impairments - Real Estate (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Impaired Long-Lived Assets Held and Used [Line Items]
Asset Impairment Charges	$ 2,851	$ 35
Segment, Continuing Operations [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Asset Impairment Charges	1,812	35
Segment, Discontinued Operations [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Asset Impairment Charges	$ 1,039	$ 0