Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

Computation Of Net Income Per Share

The computation of earnings per share is as follows:

	Three Months Ended				Nine Months Ended
	September 30, 2014		September 30, 2013		September 30, 2014		September 30, 2013
	(in thousands, except per share data)
Basic earnings per share:
Net income	$	59,295	$	31,822	$	183,428	$	63,982
Shares used in computation:
Weighted-average common shares outstanding	60,171		59,108		59,996		57,769
Basic earnings per share	$	0.99	$	0.54	$	3.06	$	1.11
Diluted earnings per share:
Net income	$	59,295	$	31,822	$	183,428	$	63,982
Senior Convertible Notes interest expense, net of tax	—		—		—		49
Numerator for diluted earnings per share	$	59,295	$	31,822	$	183,428	$	64,031
Shares used in computation:
Weighted-average common shares outstanding	60,171		59,108		59,996		57,769
Senior Convertible Notes shares	—		—		—		956
Employee stock options	1,649		1,882		1,673		1,853
Weighted-average number of shares	61,820		60,990		61,669		60,578
Diluted earnings per share	$	0.96	$	0.52	$	2.97	$	1.06

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table summarizes the potential common shares excluded from the diluted calculation:

	Three Months Ended		Nine Months Ended
	September 30, 2014	September 30, 2013	September 30, 2014	September 30, 2013
	(in thousands)
Employee stock options	53	12	64	260