Earnings Per Share

Basic earnings per common share (EPS) excludes dilution and is computed by dividing Net income attributable to common stockholders by the weighted average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if securities or other obligations to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that shared in our earnings.

A reconciliation of the numerators and denominators of basic and diluted EPS for the three years ended December 31 is presented below:



	2017		2016		2015
	(In thousands, except per share amounts)
Amounts attributable to common stockholders:
Income from continuing operations — basic	$	546,663	$	177,038	$	234,162
After tax interest on convertible debt	52		43		50
Income from continuing operations — diluted	$	546,715	$	177,081	$	234,212

Loss from discontinued operations, net of tax	$	—	$	—	$	(390	)

Net income — basic	$	546,663	$	177,038	$	233,772
After tax interest on convertible debt	52		43		50
Net income — diluted	$	546,715	$	177,081	$	233,822
Weighted average shares:
Weighted average shares — basic	187,630		193,086		200,356
Stock options	4,396		2,823		3,973
Restricted share units	99		12		—
Convertible debt	121		121		121
Weighted average shares — diluted	192,246		196,042		204,450
Amounts attributable to common stockholders:
Income from continuing operations per share:
Basic	$	2.91	$	0.92	$	1.17
Diluted	$	2.84	$	0.90	$	1.14
Net income per share:
Basic	$	2.91	$	0.92	$	1.17
Diluted	$	2.84	$	0.90	$	1.14

The computation of diluted earnings per share excludes outstanding stock options in certain periods in which the inclusion of such options would be antidilutive to the periods presented. Total options not currently included in the computation of dilutive EPS