Earnings Per Share

9 Months Ended

Sep. 30, 2011

Notes to Financial Statements [Abstract]

3.	Earnings Per Share

Basic earnings per share were calculated using net earnings and the weighted average number of shares of common stock outstanding during the respective period. Diluted earnings per share were calculated using net earnings and the weighted average number of shares of common stock and potential common stock outstanding during the respective period. Potentially dilutive common stock consisted of stock options and the premium over the conversion price on Roper's senior subordinated convertible notes based upon the trading price of Roper's common stock. The effects of potential common stock were determined using the treasury stock method. Weighted average shares outstanding are as shown below (in thousands):

	Three months ended September 30,		Nine months ended September 30,
	2011	2010	2011	2010
Basic shares outstanding	96,083	94,312	95,792	94,046
Effect of potential common stock:
Common stock awards	1,157	975	1,242	945
Senior subordinated convertible notes	1,068	1,384	1,251	1,383
Diluted shares outstanding	98,308	96,671	98,285	96,374

For the three and nine month periods ended September 30, 2011 there were 773,500 and 763,500 outstanding stock options, respectively, that were not included in the determination of diluted earnings per share because doing so would have been antidilutive; this compares to 1,139,683 and 1,575,933 outstanding stock options, respectively, that would have been antidilutive for the three and nine month periods ended September 30, 2010.