Note 15. Net Income (Loss) Per Share

Our basic net income (loss) per share is computed by dividing the net income (loss) by the number of weighted average common shares outstanding during the period. Our diluted net income (loss) per share is computed by dividing net income (loss) by the weighted average common shares outstanding during the period assuming potentially dilutive common shares of stock options, RSUs, PSUs and common shares issuable upon conversion of the 2018 Notes and 2020 Notes using the if-converted method. Common shares issuable upon conversion of the 2018 Notes and 2020 Notes were excluded from the diluted net income (loss) per share computation for all periods presented as their share effect was anti-dilutive.

Net income (loss) per share was calculated as follows for the periods indicated below:


	Year Ended December 31,
(in thousands, except per share data)	2018		2017		2016
Basic Net Income (Loss) Per Share
Basic net income (loss)	$	109,493	$	(313,142)	$	104,222
Weighted average common shares outstanding		212,383		204,580		187,873

Basic net income (loss) per share	$	0.52	$	(1.53)	$	0.55
				0		0
Diluted Net Income (Loss) Per Share
Diluted net income (loss)	$	109,493	$	(313,142)	$	104,222
Weighted average common shares outstanding		212,383		204,580		187,873

Dilutive stock options and RSUs		3,252		—		6,252

Weighted average shares used to compute diluted net income (loss) per share		215,635		204,580		194,125

Diluted net income (loss) per share	$	0.51	$	(1.53)	$	0.54

The potential common shares that were excluded from the diluted net income (loss) per share computation are as follows:


	2018	2017	2016
Outstanding stock options and awards	8,255,992	12,585,213	2,792,424
Common shares issuable upon conversion of the 2018 Notes	—	149,375	7,245,149
Common shares issuable upon conversion of the 2020 Notes	368,939	368,939	7,241,284
Total potential common shares excluded from diluted net income (loss) per share computation	8,624,931	13,103,527	17,278,857