Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2018	2017
	Equivalent Shares (if converted)	Equivalent Shares (if converted)
Series B Units	498,183	555,216
Series C Units	352,385	392,727
Series D Units	1,094,555	1,071,983
	1,945,123	2,019,926

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 March 31,
	2018			2017
Net income attributable to common stockholders	$	88,256		$	82,282
Earnings and dividends allocated to participating securities	(178		)	(197		)
Earnings for basic computations	88,078			82,085
Earnings and dividends allocated to participating securities	178			—
Income allocated to noncontrolling interest - Preferred Operating Partnership Units and Operating Partnership Units	4,941			4,049
Fixed component of income allocated to noncontrolling interest - Preferred Operating Partnership (Series A Units)	(572		)	(1,271		)
Net income for diluted computations	$	92,625		$	84,863
Weighted average common shares outstanding:
Average number of common shares outstanding - basic	125,772,439			125,605,403
OP Units	5,663,370			5,596,191
Series A Units	875,480			875,480
Shares related to exchangeable senior notes and dilutive stock options	371,271			541,570
Average number of common shares outstanding - diluted	132,682,560			132,618,644
Earnings per common share
Basic	$	0.70		$	0.65
Diluted	$	0.70		$	0.64