Earnings Per Share

3 Months Ended

Apr. 30, 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 April 30,
(in thousands)	2011		2010
Net earnings for basic and diluted EPS	$	81,063	$	64,425
Weighted-average shares for basic EPS		127,601		126,699
Incremental shares based upon the assumed exercise of stock options and unvested restricted stock units		1,780		1,844
Weighted-average shares for diluted EPS		129,381		128,543

For the three months ended April 30, 2011 and 2010, there were 313,000 and 431,000 stock options and restricted stock units excluded from the computations of earnings per diluted share due to their antidilutive effect.