Net income per common share (Tables)

3 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

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,
	2014		2013
Net income	$	89,909	$	78,579
Weighted average common shares outstanding	200,187		196,950
Dilutive effect of stock options and RSUs	3,792		3,672
Dilutive effect of convertible debt	20,548		11,644
Weighted average common and potential common shares outstanding	224,527		212,266
Basic net income per common share	$	0.45	$	0.40
Diluted net income per common share	$	0.40	$	0.37