Net Income Per Common Share

6 Months Ended

Jun. 30, 2012

Net Income Per Common Share [Abstract]

Net Income Per Common Share

Note 6 Net Income per Common Share

Basic net income per common share is based on the weighted average number of common shares outstanding. Diluted net income per common share is based on the weighted average number of common shares outstanding and potentially dilutive shares. The dilutive effect of employee stock-based compensation is included in the computation of diluted net income per common share. The dilutive effect of stock-based compensation is calculated using the treasury stock method and expected proceeds upon exercise or issuance of the stock-based compensation. The following table summarizes the shares, in thousands, used in computing basic and diluted net income per common share:

	Six Months Ended		Three Months Ended
	June 30,		June 30,
	2012	2011	2012	2011
Average common shares outstanding during
the period for basic computation	138,935	137,971	139,108	138,114
Dilutive effect of employee stock-based compensation	642	547	735	667
Average common shares outstanding during
the period for diluted computation	139,577	138,518	139,843	138,781

For the six and three months ended June 30, 2012, employee stock options to purchase 878,789 shares of common stock, were excluded from the calculations of diluted net income per share as the calculated proceeds from the options' exercise were greater than the average market price of the Company's common stock during these periods. For the six and three months ended June 30, 2011, employee stock options to purchase 933,800 shares of common stock, were excluded from the calculations of diluted net income per share as the calculated proceeds from the options' exercise were greater than the average market price of the Company's common stock during these periods.