Earnings Per Share

9 Months Ended

Oct. 31, 2011

Earnings Per Share [Abstract]

EARNINGS PER SHARE

6. EARNINGS PER SHARE

Basic earnings per share (“EPS”) is computed as net earnings divided by the weighted-average number of common shares outstanding for the period. Diluted EPS includes the dilutive effect of the assumed exercise of stock options and unvested restricted stock units.

The following table summarizes the reconciliation of the numerators and denominators for the basic and diluted EPS computations:

	Three Months Ended October 31,				Nine Months Ended October 31,
(in thousands)	2011		2010		2011		2010
Net earnings for basic and diluted EPS	$	89,689	$	55,079	$	260,795	$	187,179
Weighted-average shares for basic EPS		127,210		126,176		127,614		126,591
Incremental shares based upon the assumed exercise of stock options and unvested restricted stock units		1,602		1,729		1,715		1,686
Weighted-average shares for diluted EPS		128,812		127,905		129,329		128,277

For the three months ended October 31, 2011 and 2010, there were 410,000 and 431,000 stock options and restricted stock units excluded from the computations of earnings per diluted share due to their antidilutive effect. For the nine months ended October 31, 2011 and 2010, there were 358,000 and 450,000 stock options and restricted stock units excluded from the computations of earnings per diluted share due to their antidilutive effect.