Earnings (Loss) Per Share

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Earnings (Loss) Per Share

Earnings (Loss) Per Share

Basic earnings (loss) per share is computed using the weighted-average number of outstanding shares of common stock during the period. Diluted earnings (loss) per share is computed using the weighted-average number of outstanding shares of common stock and, when dilutive, potential common shares outstanding during the period. Potential common shares consist of shares issuable upon the assumed conversion of the Company’s Senior Convertible Notes and incremental shares issuable upon the assumed exercise of stock options. The computation of earnings (loss) per share is as follows:

	Three Months Ended
	March 31, 2013		March 31, 2012
	(in thousands, except per share data)
Basic earnings (loss) per share:
Net income (loss)	$	2,689	$	(4,584	)
Shares used in computation:
Weighted-average common shares outstanding	55,972		55,456
Basic earnings (loss) per share	$	0.05	$	(0.08	)
Diluted earnings (loss) per share:
Net income (loss)	$	2,689	$	(4,584	)
Senior Convertible Notes interest expense, net of tax	49		—
Numerator for diluted earnings per share	$	2,738	$	(4,584	)
Shares used in computation:
Weighted-average common shares outstanding	55,972		55,456
Senior Convertible Notes shares	2,331		—
Employee stock options	1,843		—
Weighted-average number of shares	60,146		55,456
Diluted earnings (loss) per share	$	0.05	$	(0.08	)

For the three months ended March 31, 2013 and 2012, 0.4 million and 1.8 million incremental shares issuable upon the assumed exercise of stock options, respectively, are not included in the calculation of diluted earnings (loss) per share, as their inclusion would have been anti-dilutive.

For the three months ended March 31, 2012, 2.3 million shares issuable upon the assumed conversion of the Company's Senior Convertible Notes are not included in the calculation of diluted earnings (loss) per share, as their inclusion would have been anti-dilutive.