Net income per common share (Tables)

3 Months Ended

Jun. 30, 2012

Earnings Per Share [Abstract]

Schedule computation of basic and diluted earnings per share

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

	Three Months Ended
	June 30,
	2012		2011
Net income	$	78,710	$	99,293
Weighted average common shares outstanding	193,452		190,112
Dilutive effect of stock options and RSUs	3,546		4,558
Dilutive effect of convertible debt	6,702		9,897
Weighted average common and potential common shares outstanding	203,700		204,567
Basic net income per common share	$	0.41	$	0.52
Diluted net income per common share	$	0.39	$	0.49