Selected Quarterly Financial Information (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

The tables below are the Company's selected quarterly information for the years ended December 31, 2015 and 2014 (in thousands, except number of properties and per share or per Common Unit data):

	Quarter Ended
2015	December 31	September 30	June 30	March 31
Rental and related revenue	$198,516	$200,938	$201,996	$214,615
General contractor and service fee revenue	$23,047	$33,599	$23,901	$52,820
General Partner
Net income attributable to common shareholders	$24,252	$76,434	$449,380	$65,244
Basic income per common share	$0.07	$0.22	$1.30	$0.19
Diluted income per common share	$0.07	$0.22	$1.30	$0.19
Weighted average common shares	345,267	345,256	345,098	344,597
Weighted average common shares and potential dilutive securities	349,532	352,150	349,161	348,653
Partnership
Net income attributable to common unitholders	$24,444	$77,185	$454,142	$65,943
Basic income per Common Unit	$0.07	$0.22	$1.30	$0.19
Diluted income per Common Unit	$0.07	$0.22	$1.30	$0.19
Weighted average Common Units	348,769	348,760	348,728	348,292
Weighted average Common Units and potential dilutive securities	349,532	352,150	349,161	348,653
2014	December 31	September 30	June 30	March 31
Rental and related revenue	$206,859	$202,067	$204,780	$208,645
General contractor and service fee revenue	$39,429	$59,739	$69,512	$55,820
General Partner
Net income (loss) attributable to common shareholders	$(3,011)	$61,533	$127,688	$18,683
Basic income (loss) per common share	$(0.01)	$0.18	$0.38	$0.06
Diluted income (loss) per common share	$(0.01)	$0.18	$0.38	$0.06
Weighted average common shares	342,853	341,165	331,753	327,106
Weighted average common shares and potential dilutive securities	342,853	345,826	336,414	331,716
Partnership
Net income (loss) attributable to common unitholders	$(3,122)	$62,328	$129,381	$18,933
Basic income (loss) per Common Unit	$(0.01)	$0.18	$0.38	$0.06
Diluted income (loss) per Common Unit	$(0.01)	$0.18	$0.38	$0.06
Weighted average Common Units	346,934	345,545	336,139	331,493
Weighted average Common Units and potential dilutive securities	346,934	345,826	336,414	331,716