Net income per common share (Notes)

3 Months Ended

Sep. 30, 2011

Notes to Financial Statements [Abstract]

Net Income Per Common Share

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



	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2011		2010		2011		2010
Net income from continuing operations	$	79,287	$	104,748	$	178,580	$	196,625
Weighted average common shares outstanding	190,809		186,303		190,461		185,922
Dilutive effect of stock options and RSUs	4,107		4,401		4,332		4,466
Dilutive effect of convertible debt	5,283		—		7,590		—
Weighted average common and potential common shares outstanding	200,199		190,704		202,383		190,388
Basic net income per common share – continuing operations	$	0.42	$	0.56	$	0.94	$	1.06
Diluted net income per common share – continuing operations	$	0.40	$	0.55	$	0.88	$	1.03

Diluted net income per common share for continuing operations for the three and six-month periods ended September 30, 2011 includes 5,282,795 and 7,589,675 shares, respectively, issuable upon the exchange of debentures (see Note 14). Diluted net income per common share for continuing operations for the three and six-month periods ended September 30, 2010 does not include any incremental 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 and six months ended September 30, 2011 was $28.64 and $28.78, respectively.

Diluted net loss per common share from discontinued operations for the three and six-month periods ended September 30, 2010 was $(0.01) and $(0.02), respectively. There was no diluted net income or loss from discontinued operations for the three and six-month periods ended September 30, 2011.

Weighted average common shares exclude the effect of anti-dilution option shares. For the three and six-month periods ended September 30, 2011, the number of option shares that were antidilutive was 119,838 and 53,374, respectively. For the three and six-month periods ended September 30, 2010, the number of option shares that were antidilutive was 353,184 and 432,134, respectively.