Earnings per Share

6 Months Ended

Jun. 30, 2011

Earnings Per Share [Abstract]

Earnings per Share

3. Earnings per Share

The denominators for the computation of basic and diluted earnings per share were calculated as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
	(In thousands)
Shares outstanding at the beginning of the period		45,828		38,592		45,463		38,410
Weighted-average number of shares issued		69		19		280		131
Denominator for basic earnings per share		45,897		38,611		45,743		38,541
Dilutive effect of employee stock options and stock grants (1)		574		315		649		388
Denominator for diluted earnings per share (2)		46,471		38,926		46,392		38,929

(1) Options to purchase common shares are included in the calculation of diluted earnings per share when their exercise prices are below the average fair value of the common shares for each of the periods presented. For the three months ended June 30, 2011, and 2010, there were approximately 81,200 and 724,500 antidilutive weighted options, respectively. For the six months ended June 30, 2011, and 2010, there were approximately 122,100 and 745,500 antidilutive weighted options, respectively. Restricted shares are included in the calculation of diluted earnings per share when their grant date fair values are below the average fair value of the common shares for each of the periods presented. There were no antidilutive weighted restricted shares for the three months and six months ended June 30, 2011. For the three months and six months ended June 30, 2010, there were approximately 1,500, and 13,500 antidilutive weighted restricted shares, respectively.

(2) Potentially dilutive shares issuable pursuant to our convertible senior notes were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive for the three month and six month periods ended June 30, 2011 and 2010.