Earnings (loss) per share

Basic EPS amounts are calculated by dividing net income (loss) allocated to common stockholders by the weighted average number of common shares outstanding. Diluted EPS amounts assume the issuance of common stock for all potentially dilutive common shares outstanding.

The following table shows the basic and diluted earnings (loss) per share for 2017, 2016, and 2015:



	For the year ended December 31, 2017
	Net income			Shares (000)	Per Share
Net income	$	48,580
Amount allocated to common stockholders	92		%
Basic EPS:
Net income allocated to common stockholders	$	44,714		87,295	$	0.51
Effect of dilutive securities:
Stock options				101
Service-based share awards				624
Diluted EPS:	$	44,714		88,020	$	0.51



	For the year ended December 31, 2016
	Net loss			Shares (000)	Per Share
Net loss	$	(252,415	)
Amount allocated to common stockholders	100		%
Basic and Diluted EPS:
Net loss allocated to common stockholders	$	(252,415	)	87,064	$	(2.90	)



	For the year ended December 31, 2015
	Net income			Shares (000)	Per Share
Net loss	$	(59,310	)
Amount allocated to common stockholders	100		%
Basic and Diluted EPS:
Net loss allocated to common stockholders	$	(59,310	)	87,375	$	(0.68	)



Securities excluded from the calculation of diluted EPS:	2017	2016	2015
Stock options ⁽¹⁾	83,083	105,453	356,634
Service-based share awards ⁽¹⁾	496,036	840,402	608,914


⁽¹⁾	In periods when we report a net loss, all share-based compensation awards are excluded from the calculation of diluted weighted average shares outstanding because of their antidilutive effect on earnings (loss) per share.