Annual report pursuant to Section 13 and 15(d)

Real Estate Investments - Continuing Operations (Details)

v2.4.0.8
Real Estate Investments - Continuing Operations (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Real Estate Properties [Line Items]      
Real estate investment property, at cost $ 2,102,227 $ 2,005,383 $ 385,400
Properties under development or held for future development 61,315 45,270  
Office [Member]
     
Real Estate Properties [Line Items]      
Properties under development or held for future development 12,175 8,922  
Retail [Member]
     
Real Estate Properties [Line Items]      
Properties under development or held for future development 495 587  
Multifamily [Member]
     
Real Estate Properties [Line Items]      
Properties under development or held for future development 48,645 35,761  
Office [Member]
     
Real Estate Properties [Line Items]      
Real estate investment property, at cost 1,296,967 1,261,534  
Retail [Member]
     
Real Estate Properties [Line Items]      
Real estate investment property, at cost 415,899 411,948  
Multifamily [Member]
     
Real Estate Properties [Line Items]      
Real estate investment property, at cost $ 389,361 $ 331,901