Net income per common share (Tables)

12 Months Ended

Mar. 31, 2011

Notes to Financial Statements [Abstract]

Schedule computation of basic and diluted earnings per share

The following table sets forth the computation of basic and diluted net income per share from continuing operations (in thousands, except per share amounts):

	Year Ended March 31,
	2011		2010		2009
Net income from continuing operations	$	429,167	$	217,005	$	245,587
Weighted average common shares outstanding		187,066		183,642		183,158
Dilutive effect of stock options and RSUs		4,463		3,697		3,336
Dilutive effect of convertible debt		3,186		---		294
Weighted average common and potential common shares outstanding		194,715		187,339		186,788
Basic net income per common share – continuing operations	$	2.29	$	1.18	$	1.34
Diluted net income per common share – continuing operations	$	2.20	$	1.16	$	1.31