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Real Estate and Discontinued Operations (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
properties
Sep. 30, 2011
Sep. 30, 2012
properties
Sep. 30, 2011
Dec. 31, 2011
properties
Real Estate Properties [Line Items]          
Debt satisfaction gains (charges), net $ 12 $ (6) $ (1,639) $ 3  
Total gross revenues 998 4,928 6,993 17,389  
Pre-tax income (loss), including gains on sale 5,570 (14,456) 2,643 (67,773)  
Discontinued Operation Asset Impairment Charges 0 15,211 5,690 76,110  
Impairment of Real Estate     4,262 38,719  
Real Estate Properties Held For Sale 1   1   1
Eight Properties [Member]
         
Real Estate Properties [Line Items]          
Real Estate Number Of Properties Sold     8    
Real Estate Land Area (acres)     6.9    
Aggregate Gross Disposition Price     129,715    
Aggregate Gain on Sales of Properties     8,946    
Debt satisfaction gains (charges), net     1,189    
Transferred Property [Member]
         
Real Estate Properties [Line Items]          
Transfer of Real Estate     7,119    
Debt satisfaction gains (charges), net     1,728    
Fourteen Properties [Member]
         
Real Estate Properties [Line Items]          
Real Estate Number Of Properties Sold       14  
Aggregate Gross Disposition Price       137,467  
Aggregate Gain on Sales of Properties       5,251  
Debt satisfaction gains (charges), net       603  
Nonrecourse Mortgage Debt       28,648  
Seller Financing       $ 3,003