Quarterly report pursuant to Section 13 or 15(d)

Properties, net (Details 3)

v2.3.0.15
Properties, net (Details 3) (USD $)
3 Months Ended 9 Months Ended 1 Months Ended
Jun. 30, 2011
Sep. 30, 2011
sqfeet
Year
property
segment
Mar. 31, 2011
Fort Ritchie
Strategic Reallocation Plan and Impairment Losses      
Term of Strategic Reallocation Plan (in years)   3  
Aggregate non-cash impairment losses on properties to be disposed $ 44,600,000    
Non-cash impairment losses on properties to be disposed in discontinued operations 14,500,000 14,523,000  
Income tax benefit of aggregate non-cash impairment losses on properties to be disposed 4,600,000    
Expected net proceeds from Strategic Reallocation Plan   200,000,000  
Properties      
Non-cash impairment losses     $ 27,700,000