v2.4.0.6
Segment Information (Details 3) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Revenue                      
Total revenues $ 571,401 $ 562,528 $ 362,630 $ 268,432 $ 265,965 $ 262,636 $ 241,291 $ 238,859 $ 1,764,991 $ 1,008,751 $ 923,465
Net real estate property:                      
Net real estate property 15,913,732       5,279,519       15,913,732 5,279,519  
United States
                     
Revenue                      
Total revenues                 1,672,952 924,221 849,737
Net real estate property:                      
Net real estate property 15,510,824       4,857,510       15,510,824 4,857,510  
Canada
                     
Revenue                      
Total revenues                 92,039 84,530 73,728
Net real estate property:                      
Net real estate property $ 402,908       $ 422,009       $ 402,908 $ 422,009