A summary of the earnings (loss) per share calculation is as follows (in thousands, except per share amounts):



	Year Ended December 31,
	2013		2012			2011
Basic earnings (loss) per share:
Net income (loss)	$	57,266	$	(34,404	)	$	34,291
Weighted-average common shares	29,421		28,636			28,609
Basic earnings (loss) per share	$	1.95	$	(1.20	)	$	1.20
Diluted earnings (loss) per share (1):
Net income (loss)	$	57,266	$	(34,404	)	$	34,291
Weighted-average common shares	29,421		28,636			28,609
Effect of dilutive securities:
Employee stock plans	999		—			1,355
Diluted weighted-average common shares	30,420		28,636			29,964
Diluted earnings (loss) per share	$	1.88	$	(1.20	)	$	1.14

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(1)

The Company includes the shares underlying performance-based awards in the calculation of diluted earnings per share if the performance conditions have been satisfied as of the end of the reporting period and excludes such shares when the necessary conditions have not been met. The Company has included the shares underlying the 2013 and 2012 awards in the 2013 and 2012 calculations, respectively, as those shares were contingently issuable upon the satisfaction of the annual targets consisting of net revenue, non-GAAP operating earnings and achievement of strategic goals as of the end of the periods. The Company has excluded all performance-based awards underlying the 2011 awards in the 2011 calculation as the performance conditions for those awards were not met as of the end of the period.