Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Schedule of Antidilutive Shares Excluded from Computation of Earnings Per Share

The following table presents the number of Preferred Operating Partnership units, and the potential common shares, that were excluded from the computation of earnings per share as their effect would have been anti-dilutive.

	For the Three Months Ended September 30,		For the Nine Months Ended September 30,
	2018	2017	2018	2017
	Equivalent Shares (if converted)	Equivalent Shares (if converted)	Equivalent Shares (if converted)	Equivalent Shares (if converted)
Series B Units	451,386	538,312	465,115	546,526
Series C Units	319,283	380,769	328,994	386,580
Series D Units	—	1,126,831	1,021,901	1,091,319
	770,669	2,045,912	1,816,010	2,024,425

Schedule of Computation of Earnings Per Common Share

The computation of earnings per common share was as follows for the periods presented:

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
	2018			2017			2018			2017
Net income attributable to common stockholders	$	130,418		$	93,764		$	313,827		$	263,052
Earnings and dividends allocated to participating securities	(219		)	(191		)	(550		)	(595		)
Earnings for basic computations	130,199			93,573			313,277			262,457
Earnings and dividends allocated to participating securities	—			191			550			595
Income allocated to noncontrolling interest - Preferred Operating Partnership Units and Operating Partnership Units	7,336			5,163			17,191			15,448
Fixed component of income allocated to noncontrolling interest - Preferred Operating Partnership (Series A Units)	(572		)	(572		)	(1,716		)	(2,547		)
Net income for diluted computations	$	136,963		$	98,355		$	329,302		$	275,953
Weighted average common shares outstanding:
Average number of common shares outstanding - basic	126,466,837			125,717,517			125,959,926			125,665,787
OP Units	5,636,845			5,590,231			5,650,599			5,586,908
Series A Units	875,480			875,480			875,480			875,480
Series D Units	991,738			—			—			—
Unvested restricted stock awards included for treasury stock method	—			280,484			250,630			288,831
Shares related to exchangeable senior notes and dilutive stock options	269,390			580,761			279,055			591,616
Average number of common shares outstanding - diluted	134,240,290			133,044,473			133,015,690			133,008,622
Earnings per common share
Basic	$	1.03		$	0.74		$	2.49		$	2.09
Diluted	$	1.02		$	0.74		$	2.48		$	2.07