Earnings Per Share

6 Months Ended

Jul. 31, 2011

Earnings Per Share [Abstract]

EARNINGS PER SHARE

5. 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 July 31,				Six Months Ended July 31,
(in thousands)	2011		2010		2011		2010
Net earnings for basic and diluted EPS	$	90,043	$	67,675	$	171,106	$	132,100
Weighted-average shares for basic EPS		128,030		126,897		127,816		126,798
Incremental shares based upon the assumed exercise of stock options and unvested restricted stock units		1,764		1,488		1,771		1,666
Weighted-average shares for diluted EPS		129,794		128,385		129,587		128,464

For the three months ended July 31, 2011 and 2010, there were 351,000 and 487,000 stock options and restricted stock units excluded from the computations of earnings per diluted share due to their antidilutive effect. For the six months ended July 31, 2011 and 2010, there were 332,000 and 459,000 stock options and restricted stock units excluded from the computations of earnings per diluted share due to their antidilutive effect.