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Sales of Real Estate and Discontinued Operations (Tables)
12 Months Ended
Dec. 31, 2012
Real Estate and Discontinued Operations [Abstract]  
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]
The following presents the operating results for the properties sold and held for sale during the years ended December 31, 2012, 2011 and 2010:
 
 
Year Ending December 31,
 
 
2012
 
2011
 
2010
Total gross revenues
 
$
7,892

 
$
22,718

 
$
46,572

Pre-tax net income (loss), including gains on sales
 
$
5,943

 
$
(70,591
)
 
$
(29,339
)