Earnings Per Common Share (Tables)

6 Months Ended

Jun. 30, 2017

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,
	2017	2016	2017	2016
	Equivalent Shares (if converted)	Equivalent Shares (if converted)	Equivalent Shares (if converted)	Equivalent Shares (if converted)
Series B Units	546,455	463,982	550,765	472,670
Series C Units	386,529	328,193	389,578	334,338
Series D Units	1,073,610	292,443	1,072,784	226,285
	2,006,594	1,084,618	2,013,127	1,033,293

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,
	2017			2016			2017			2016
Net income attributable to common stockholders	$	87,006		$	83,044		$	169,288		$	165,636
Earnings and dividends allocated to participating securities	(207		)	(214		)	(403		)	(380		)
Earnings for basic computations	86,799			82,830			168,885			165,256
Earnings and dividends allocated to participating securities	—			—			—			380
Income allocated to noncontrolling interest - Preferred Operating Partnership (Series A Units) and Operating Partnership	4,965			5,398			10,285			10,872
Fixed component of income allocated to noncontrolling interest - Preferred Operating Partnership (Series A Units)	(704		)	(1,271		)	(1,975		)	(2,542		)
Net income for diluted computations	$	91,060		$	86,957		$	177,195		$	173,966
Weighted average common shares outstanding:
Average number of common shares outstanding - basic	125,673,156			124,914,467			125,639,480			124,678,293
OP Units	5,574,364			5,517,607			5,585,218			5,569,537
Series A Units	875,480			875,480			875,480			875,480
Unvested restricted stock awards included for treasury stock method	—			—			—			309,987
Shares related to exchangeable senior notes and dilutive stock options	660,402			718,361			659,176			719,222
Average number of common shares outstanding - diluted	132,783,402			132,025,915			132,759,354			132,152,519
Earnings per common share
Basic	$	0.69		$	0.66		$	1.34		$	1.33
Diluted	$	0.69		$	0.66		$	1.33		$	1.32