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Leases (Tables)
 12 Months Ended
Dec. 31, 2011
Leases [Abstract]  
Schedule Of Future Minimum Rental Income From Operating Leases [Table Text Block]
 (Amounts in thousands)     
       
 Year Ending December 31, Amount  
 2012 $ 153,304  
 2013   151,302  
 2014   148,684  
 2015   148,384  
 2016   138,570  
 Thereafter   1,367,758  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
 (Amounts in thousands)     
       
 Year Ending December 31, Amount  
 2012 $ 802  
 2013   803  
 2014   802  
 2015   803  
 2016   802  
 Thereafter   8,203