v2.4.0.6
Intangibles (Details) (USD $)
 12 Months Ended
Dec. 31, 2011
Y
Dec. 31, 2010
Y
Dec. 31, 2009
Intangible assets:      
Above market lease intangibles $ 210,358,000 $ 13,232,000  
In-place and other lease intangibles 590,500,000 133,582,000  
Other intangibles 16,169,000 13,649,000  
Accumulated amortization (188,442,000) (100,808,000)  
Goodwill 448,393,000 19,901,000  
Net intangible assets 1,076,978,000 79,556,000  
Remaining weighted average amortization period of above market lease intangible assets (in years) 10.1 7.1  
Remaining weighted average amortization period of in-place lease intangible assets (in years) 18.4 11.2  
Remaining weighted average amortization period of other intangible assets (in years) 16.1 47.4  
Remaining weighted average amortization period of lease-related intangible assets (in years) 18.6 18.5  
Intangible liabilities:      
Below market lease intangibles 442,612,000 22,398,000  
Other lease intangibles 27,157,000 0  
Accumulated amortization (37,607,000) (12,495,000)  
Purchase option intangibles 112,670,000 0  
Net intangible liabilities 544,832,000 9,903,000  
Remaining weighted average amortization period of below market lease intangible liabilities (in years) 15.3 6.9  
Remaining weighted average amortization period of other lease intangible liabilities (in years) 7.7 0.0  
Remaining weighted average amortization period of lease-related intangible liabilities (in years) 15.2 6.9  
Intangibles      
Net amortization expense 62,500,000 6,900,000 1,900,000
Estimated net amortization of the intangibles during 2012 82,900,000    
Estimated net amortization of the intangibles during 2013 19,200,000    
Estimated net amortization of the intangibles during 2014 14,400,000    
Estimated net amortization of the intangibles during 2015 10,400,000    
Estimated net amortization of the intangibles during 2016 $ 6,400,000