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Summary of Quarterly Results
12 Months Ended
Dec. 31, 2011
Quarterly Financial Data Abstract  
Quarterly Financial Information Text Block

22.       Summary of Quarterly Results (Unaudited)

The following summary represents the results of operations for each quarter in 2011 and 2010:

       Net Income        
       Attributable  Net Income Per  
       to Class A Class A Unit (2)  
 (Amounts in thousands, except per unit amounts)Revenues Unitholders (1) Basic Diluted  
  2011             
   December 31$ 741,815 $ 74,182 $ 0.37 $ 0.37  
   September 30  727,343   43,932   0.22   0.22  
   June 30  719,624   98,196   0.50   0.49  
   March 31  726,883   426,520   2.17   2.12  
                 
  2010             
   December 31$ 702,836 $ 260,662 $ 1.33 $ 1.31  
   September 30  687,125   102,311   0.52   0.51  
   June 30  674,192   62,291   0.31   0.31  
   March 31  676,528   215,500   1.10   1.09  
_______________________________             
                 
 (1)Fluctuations among quarters resulted primarily from non-cash impairment losses, mark-to-market of derivative instruments, net gains on sale of real estate and from seasonality of business operations.
                 
 (2)The total for the year may differ from the sum of the quarters as a result of weighting.