Earnings Per Common Share (Tables)

6 Months Ended

Jun. 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 June 30,		For the Six Months Ended June 30,
	2018	2017	2018	2017
	Equivalent Shares (if converted)	Equivalent Shares (if converted)	Equivalent Shares (if converted)	Equivalent Shares (if converted)
Series B Units	450,077	546,455	472,350	550,765
Series C Units	318,357	386,529	334,112	389,578
Series D Units	988,862	1,073,610	1,037,798	1,072,784
	1,757,296	2,006,594	1,844,260	2,013,127

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 June 30,						For the Six Months Ended June 30,
	2018			2017			2018			2017
Net income attributable to common stockholders	$	95,153		$	87,006		$	183,409		$	169,288
Earnings and dividends allocated to participating securities	(193		)	(207		)	(371		)	(403		)
Earnings for basic computations	94,960			86,799			183,038			168,885
Earnings and dividends allocated to participating securities	—			—			371			—
Income allocated to noncontrolling interest - Preferred Operating Partnership Units and Operating Partnership Units	5,271			4,965			10,211			10,285
Fixed component of income allocated to noncontrolling interest - Preferred Operating Partnership (Series A Units)	(572		)	(704		)	(1,144		)	(1,975		)
Net income for diluted computations	$	99,659		$	91,060		$	192,476		$	177,195
Weighted average common shares outstanding:
Average number of common shares outstanding - basic	125,874,130			125,673,156			125,823,581			125,639,480
OP Units	5,651,878			5,574,364			5,657,592			5,585,218
Series A Units	875,480			875,480			875,480			875,480
Unvested restricted stock awards included for treasury stock method	—			—			256,733			—
Shares related to exchangeable senior notes and dilutive stock options	371,284			660,402			379,348			659,176
Average number of common shares outstanding - diluted	132,772,772			132,783,402			132,992,734			132,759,354
Earnings per common share
Basic	$	0.75		$	0.69		$	1.45		$	1.34
Diluted	$	0.75		$	0.69		$	1.45		$	1.33