Net income per common share (Notes)

12 Months Ended

Mar. 31, 2014

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):

	Year ended March 31,
	2014		2013		2012
Net income	$	395,281	$	127,389	$	336,705
Weighted average common shares outstanding	198,291		194,595		191,283
Dilutive effect of stock options and RSUs	3,910		3,650		4,207
Dilutive effect of convertible debt	15,429		7,531		8,029
Weighted average common and potential common shares outstanding	217,630		205,776		203,519
Basic net income per common share	$	1.99	$	0.65	$	1.76
Diluted net income per common share	$	1.82	$	0.62	$	1.65

Diluted net income per common share for fiscal 2014, 2013, and 2012 includes 15,429,003, 7,531,111 and 8,029,255 shares, respectively, issuable upon the exchange of debentures (see Note 14).  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 fiscal 2014, 2013 and 2012 was $26.32, $27.36 and $28.50, respectively. 

Weighted average common shares exclude the effect of option shares which are not dilutive.  There were no antidilutive option shares for fiscal 2014. For fiscal 2013 and 2012, the number of option shares that were antidilutive was 98,068 and 53,374, respectively.