Annual report pursuant to Section 13 and 15(d)

Properties, net (Details 3)

v2.4.0.6
Properties, net (Details 3) (USD $)
 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2011
property
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2011
property
Dec. 31, 2011
Non-operating properties
Jun. 30, 2011
Non-operating properties
Mar. 31, 2011
Non-operating properties
Dec. 31, 2011
Non-operating properties
Dec. 31, 2011
Operating properties, net
Jun. 30, 2011
Operating properties, net
Dec. 31, 2011
Operating properties, net
Mar. 31, 2011
Fort Ritchie
Non-operating properties
Strategic Reallocation Plan and Impairment Losses                        
Aggregate non-cash impairment losses on properties included in disposition plan       $ 122,500,000                
Non-cash impairment losses on properties included in disposition plan in discontinued operations       23,256,000                
Income tax benefit of aggregate non-cash impairment losses on properties included in disposition plan       8,700,000                
Estimated net proceeds from Strategic Reallocation Plan       441,000,000                
Number of real estate properties included in disposition plan 83     83                
Estimated aggregate fair value of the properties included in the Strategic Reallocation Plan 562,000,000     562,000,000                
Properties                        
Additional impairment losses on goodwill                     803,000  
Non-cash impairment losses                       27,700,000
Impairment losses recognized $ 78,674,000 $ 44,605,000 $ 27,742,000 $ 151,021,000 $ 39,193,000 $ 13,574,000 $ 27,742,000 $ 80,509,000 $ 39,481,000 $ 31,031,000 $ 70,512,000