Net income per common share (Notes)

3 Months Ended

Jun. 30, 2011

Notes to Financial Statements [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 from continuing operations (in thousands, except per share amounts):

	Three Months Ended
	June 30,
	2011		2010
Net income from continuing operations	$	99,293	91,877
Weighted average common shares outstanding	190,112		185,540
Dilutive effect of stock options and RSUs	4,558		4,532
Dilutive effect of convertible debt	9,897		—
Weighted average common and potential common shares outstanding	204,567		190,072
Basic net income per common share – continuing operations	$	0.52	$	0.50
Diluted net income per common share – continuing operations	$	0.49	$	0.48

Diluted net income per common share for continuing operations for the three-month period ended June 30, 2011 includes 9,896,555 shares issuable upon the exchange of the debentures (see Note 14).  Diluted net income per common share for continuing operations for the three-month period ended June 30, 2010 does not include any incremental shares issuable upon the exchange of the 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 months ended June 30, 2011 was $28.92.

Diluted net loss per common share for discontinued operations for the three-month period ended June 30, 2010 was $(0.01). There was no diluted net income or loss per common share for the three-month period ended June 30, 2011.

Weighted average common shares exclude the effect of anti-dilution option shares.  For the three-month period ended June 30, 2011, there were no option shares that were antidilutive. For the three-month period ended June 30, 2010, the number of option shares that were antidilutive was 497,737.