XML 31 R73.htm IDEA: XBRL DOCUMENT v2.4.0.8
Schedule III Real Estate and Accumulated Depreciation (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Reconciliation of Real Estate Properties:      
Balance, beginning of year $ 33,924,377 $ 29,333,330 $ 27,192,223
Acquisitions and consolidations 288,835 4,438,848 2,068,452
Improvements 958,971 833,083 552,455
Disposals and deconsolidations (399,023) (680,884) (479,800)
Balance, close of year 34,773,160 33,924,377 29,333,330
Unaudited aggregate cost of real estate for federal income tax purposes 29,419,072    
Reconciliation of Accumulated Depreciation:      
Balance, beginning of year 8,836,695 8,148,170 7,485,821
Depreciation expense 1,108,602 1,069,607 906,554
Disposals and deconsolidations (128,207) (381,082) (244,205)
Balance, close of year $ 9,817,090 $ 8,836,695 $ 8,148,170
Structure | Maximum
     
Estimated original lives      
Depreciable life 35 years    
Structure | Minimum
     
Estimated original lives      
Depreciable life 10 years    
Landscaping and parking lot
     
Estimated original lives      
Depreciable life 15 years    
HVAC equipment
     
Estimated original lives      
Depreciable life 10 years