Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Computation Of Net Income Per Share

The computation of earnings per share is as follows:

	Three Months Ended
	March 31, 2015		March 31, 2014
	(in thousands, except per share data)
Basic earnings per share:
Net income	$	23,696	$	53,115
Shares used in computation:
Weighted-average common shares outstanding	60,518		59,817
Basic earnings per share	$	0.39	$	0.89
Diluted earnings per share:
Net income	$	23,696	$	53,115
Shares used in computation:
Weighted-average common shares outstanding	60,518		59,817
Employee stock options	1,455		1,731
Weighted-average number of shares	61,973		61,548
Diluted earnings per share	$	0.38	$	0.86

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
	March 31, 2015	March 31, 2014
	(in thousands)
Employee stock options	256	41