Per Share and Per Unit Data (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Per Share And Per Unit Data
Net Income attributable to common stockholders or unitholders	$ 477,736	$ 480,995
Net Income attributable to Common Stockholders — Diluted	$ 477,736	$ 480,995
Weighted Average Shares Outstanding — Basic and Diluted	312,809,981	309,416,266
Simon Property Group L.P.
Per Share And Per Unit Data
Net Income attributable to common stockholders or unitholders	$ 550,006	$ 561,797
Net Income attributable to Common Stockholders — Diluted	$ 550,006	$ 561,797
Weighted Average Shares Outstanding — Basic and Diluted	360,130,442	361,394,591