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Discontinued Operations and Real Estate Impairment (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Real Estate Properties [Line Items]    
Debt satisfaction charges, net $ (10,996) $ (1,649)
Total gross revenues 0 4,499
Pre-tax income (loss), including gains on sale 4,903 (329)
Discontinued Operation Asset Impairment Charges 7,344 2,561
Impairment of Real Estate 2,413  
Sold Properties [Member]
   
Real Estate Properties [Line Items]    
Aggregate Gross Disposition Price 1,900 2,500
Real Estate Number Of Properties Sold 1 1
Transferred Property [Member]
   
Real Estate Properties [Line Items]    
Real Estate Number Of Properties Transferred 2 1
Transfer of Real Estate 23,281 7,119
Debt satisfaction charges, net $ 10,549 $ 1,728