Earnings Per Share

6 Months Ended

Jun. 30, 2015

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 shown below (in thousands):

	Three months ended June 30,				Six months ended June 30,
	2015		2014		2015		2014
Basic shares outstanding		100,573		99,881		100,475		99,720
Effect of potential common stock:
Common stock awards		909		792		884		826
Senior subordinated convertible notes		87		150		109		150
Diluted shares outstanding		101,569		100,823		101,468		100,696

For the three and six month periods ended June 30, 2015 there were 457,305 and 651,805 outstanding stock options, respectively, that were not included in the determination of diluted earnings per share because doing so would have been antidilutive, as compared to 749,666 and 770,665 outstanding stock options, respectively, that would have been antidilutive for the three and six month periods ended June 30, 2014.