Net (loss) income per common share (Notes)

3 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Net income per common share

Net Income Per Common 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,
	2013		2012
Net income	$	78,579	$	78,710
Weighted average common shares outstanding	196,950		193,452
Dilutive effect of stock options and RSUs	3,672		3,546
Dilutive effect of convertible debt	11,644		6,702
Weighted average common and potential common shares outstanding	212,266		203,700
Basic net income per common share	$	0.40	$	0.41
Diluted net income per common share	$	0.37	$	0.39

Diluted net income per common share for the three months ended June 30, 2013 includes 11,644,236 shares issuable upon the exchange of debentures (see Note 14).  Diluted net income per common share for the three months ended June 30, 2012 includes 6,702,184 shares issuable upon the exchange of debentures.  The debentures have no impact on diluted net income per common share unless the average price of the Company's common stock exceeds the conversion price because the principal amount of the debentures will be settled in cash upon conversion.  Prior to conversion, the Company will include, in the diluted net income per common share calculation, the effect of the additional shares that may be issued when the Company's common stock price exceeds the conversion price using the treasury stock method.  The weighted average conversion price per share used in calculating the dilutive effect of the convertible debt for the three month periods ended June 30, 2013 and June 30, 2012 was $26.66 and $27.79, respectively.

Weighted average common shares exclude the effect of option shares which are not dilutive.  For the three months ended June 30, 2013, the number of option shares that were antidilutive was 50,198. For the three months ended June 30, 2012, the number of option shares that were antidilutive was 110,125.