Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]

The following tables set forth the computation of net income per share – basic and net income per share – diluted for the Company (amounts in thousands except per share amounts):

	Year Ended December 31,
	2015			2014			2013
Numerator for net income per share – basic:
Income (loss) from continuing operations	$	907,621		$	657,101		$	(168,174	)
Allocation to Noncontrolling Interests – Operating Partnership, net	(34,226		)	(24,771		)	6,834
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties	(3,657		)	(2,544		)	538
Preferred distributions	(3,357		)	(4,145		)	(4,145		)
Premium on redemption of Preferred Shares	(3,486		)	—			—
Income (loss) from continuing operations available to Common Shares, net of   Noncontrolling Interests	862,895			625,641			(164,947		)
Discontinued operations, net of Noncontrolling Interests	382			1,522			1,991,415
Numerator for net income per share – basic	$	863,277		$	627,163		$	1,826,468
Numerator for net income per share – diluted (1):
Income from continuing operations	$	907,621		$	657,101
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(3,657		)	(2,544		)
Preferred distributions	(3,357		)	(4,145		)
Premium on redemption of Preferred Shares	(3,486		)	—
Income from continuing operations available to Common Shares	897,121			650,412
Discontinued operations, net	397			1,582
Numerator for net income per share – diluted (1)	$	897,518		$	651,994		$	1,826,468
Denominator for net income per share – basic and diluted (1):
Denominator for net income per share – basic	363,498			361,181			354,305
Effect of dilutive securities:
OP Units	13,576			13,718
Long-term compensation shares/units	3,546			2,836
Denominator for net income per share – diluted (1)	380,620			377,735			354,305
Net income per share – basic	$	2.37		$	1.74		$	5.16
Net income per share – diluted	$	2.36		$	1.73		$	5.16
Net income per share – basic:
Income (loss) from continuing operations available to Common Shares, net of   Noncontrolling Interests	$	2.37		$	1.73		$	(0.47	)
Discontinued operations, net of Noncontrolling Interests	—			0.01			5.63
Net income per share – basic	$	2.37		$	1.74		$	5.16
Net income per share – diluted (1):
Income (loss) from continuing operations available to Common Shares	$	2.36		$	1.72		$	(0.47	)
Discontinued operations, net	—			0.01			5.63
Net income per share – diluted	$	2.36		$	1.73		$	5.16

(1) Potential common shares issuable from the assumed conversion of OP Units and the exercise/vesting of long-term compensation shares/units are automatically anti-dilutive and therefore excluded from the diluted earnings per share calculation as the Company had a loss from continuing operations for the year ended December 31, 2013.

ERPOP [Member]

Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]

The following tables set forth the computation of net income per Unit – basic and net income per Unit – diluted for the Operating Partnership (amounts in thousands except per Unit amounts):

	Year Ended December 31,
	2015			2014			2013
Numerator for net income per Unit – basic and diluted (1):
Income (loss) from continuing operations	$	907,621		$	657,101		$	(168,174	)
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties	(3,657		)	(2,544		)	538
Allocation to Preference Units	(3,357		)	(4,145		)	(4,145		)
Allocation to premium on redemption of Preference Units	(3,486		)	—			—
Income (loss) from continuing operations available to Units	897,121			650,412			(171,781		)
Discontinued operations, net	397			1,582			2,073,527
Numerator for net income per Unit – basic and diluted (1)	$	897,518		$	651,994		$	1,901,746
Denominator for net income per Unit – basic and diluted (1):
Denominator for net income per Unit – basic	377,074			374,899			368,038
Effect of dilutive securities:
Dilution for Units issuable upon assumed exercise/vesting of the Company's     long-term compensation shares/units	3,546			2,836
Denominator for net income per Unit – diluted (1)	380,620			377,735			368,038
Net income per Unit – basic	$	2.37		$	1.74		$	5.16
Net income per Unit – diluted	$	2.36		$	1.73		$	5.16
Net income per Unit – basic:
Income (loss) from continuing operations available to Units	$	2.37		$	1.73		$	(0.47	)
Discontinued operations, net	—			0.01			5.63
Net income per Unit – basic	$	2.37		$	1.74		$	5.16
Net income per Unit – diluted (1):
Income (loss) from continuing operations available to Units	$	2.36		$	1.72		$	(0.47	)
Discontinued operations, net	—			0.01			5.63
Net income per Unit – diluted	$	2.36		$	1.73		$	5.16

(1) Potential Units issuable from the assumed exercise/vesting of the Company's long-term compensation shares/units are automatically anti-dilutive and therefore excluded from the diluted earnings per Unit calculation as the Operating Partnership had a loss from continuing operations for the year ended December 31, 2013.