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Real Estate Activity During the Nine Months Ended September 30, 2013 Business Acquistion pro forma (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended 0 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2012
Mountain View Research And Technology Parks [Member]
May 31, 2013
767 Fifth Avenue (The GM Building) [Member]
Sep. 30, 2013
767 Fifth Avenue (The GM Building) [Member]
Sep. 30, 2012
767 Fifth Avenue (The GM Building) [Member]
Business Acquisition [Line Items]                
Gain on consolidation of joint ventures $ (1,810) $ 0 $ 385,991 $ 0 $ 26,500 $ 359,500 $ (3,900) $ 359,500
Total Revenue     1,688,393 1,602,949        
Income from continuing operations     234,784 573,170        
Net income attributable to Boston Properties Limited Partnership     $ 351,549 $ 633,626        
Basic earnings per share, Net income attributable to Boston Properties Limited Partnership (dollars per share)     $ 2.08 $ 3.76        
Diluted earnings per share, Net income attributable to Boston Properties Limited Partnership (dollars per share     $ 2.07 $ 3.75