Annual report pursuant to Section 13 and 15(d)

Noncontrolling Interests In Subsidiaries (Narrative) (Details)

v2.4.0.8
Noncontrolling Interests In Subsidiaries (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Oct. 28, 2011
Series C Preferred Stock [Member]
Dec. 31, 2013
Participation Rights [Member]
Dec. 31, 2013
Office Buildings [Member]
Participation Rights [Member]
property
Noncontrolling Interest [Line Items]          
Preferred stock issued     $ 25    
Preferred unit in operating partnership     25    
Number of common shares received upon redemption of common units 1        
Rebalance of ownership percentage $ 0.7        
Percentage of noncontrolling interest 11.90% 12.20%      
Number of properties         3
Excess net cash flow remaining after the distribution to the Company       50.00%  
Internal rate of return       10.00%