Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Computation Of Net Income Per Share

The computation of earnings per share is as follows:

	Three Months Ended				Six Months Ended
	June 30, 2014		June 30, 2013		June 30, 2014		June 30, 2013
	(in thousands, except per share data)
Basic earnings per share:
Net income	$	71,018	$	29,471	$	124,133	$	32,160
Shares used in computation:
Weighted-average common shares outstanding	59,996		58,192		59,907		57,089
Basic earnings per share	$	1.18	$	0.51	$	2.07	$	0.56
Diluted earnings per share:
Net income	$	71,018	$	29,471	$	124,133	$	32,160
Senior Convertible Notes interest expense, net of tax	—		—		—		49
Numerator for diluted earnings per share	$	71,018	$	29,471	$	124,133	$	32,209
Shares used in computation:
Weighted-average common shares outstanding	59,996		58,192		59,907		57,089
Senior Convertible Notes shares	—		564		—		1,442
Employee stock options	1,638		1,834		1,685		1,838
Weighted-average number of shares	61,634		60,590		61,592		60,369
Diluted earnings per share	$	1.15	$	0.49	$	2.02	$	0.53

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		Six Months Ended
	June 30, 2014	June 30, 2013	June 30, 2014	June 30, 2013
	(in thousands)
Employee stock options	99	318	70	384