Earnings per Share and Unit (Tables)

12 Months Ended

Dec. 31, 2017

Parent Company Earnings per Share

The following summarizes the calculation of basic and diluted earnings per share:



	Year ended December 31,
(in thousands, except per share data)	2017		2016	2015
Numerator:
Income from operations attributable to common stockholders - basic	$	159,949	143,860	128,994
Income from operations attributable to common stockholders - diluted	$	159,949	143,860	128,994
Denominator:
Weighted average common shares outstanding for basic EPS	159,536		100,863	94,391
Weighted average common shares outstanding for diluted EPS ⁽¹⁾	159,960		101,285	94,856


Income per common share – basic	$	1.00	1.43	1.37
Income per common share – diluted	$	1.00	1.42	1.36

⁽¹⁾ Includes the dilutive impact of unvested restricted stock.

Operating Partnership Earnings per Unit

The following summarizes the calculation of basic and diluted earnings per unit:



	Year ended December 31,
(in thousands, except per share data)	2017		2016	2015
Numerator:
Income from operations attributable to common unit holders - basic	$	160,337	144,117	129,234
Income from operations attributable to common unit holders - diluted	$	160,337	144,117	129,234
Denominator:
Weighted average common units outstanding for basic EPU	159,831		101,017	94,546
Weighted average common units outstanding for diluted EPU ⁽¹⁾	160,255		101,439	95,011

Income per common unit – basic	$	1.00	1.43	1.37
Income per common unit – diluted	$	1.00	1.42	1.36

⁽¹⁾ Includes the dilutive impact of unvested restricted stock and forward equity offering using the treasury stock method.