Earnings Per Share

9 Months Ended

Sep. 30, 2012

Notes to Financial Statements [Abstract]

Earnings Per Share

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,
	2012	2011	2012	2011
Basic shares outstanding	97,876	96,083	97,460	95,792
Effect of potential common stock:
Common stock awards	1,017	1,157	1,077	1,242
Senior subordinated convertible notes	864	1,068	1,006	1,251
Diluted shares outstanding	99,757	98,308	99,543	98,285

For the three and nine month periods ended September 30, 2012 there were 540,266 and 589,666 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 773,500 and 763,500 outstanding stock options, respectively, that would have been antidilutive for the three and nine month periods ended September 30, 2011.