Earnings per Share

6 Months Ended

Jun. 30, 2017

We compute basic earnings per common share by dividing net income attributable to Core Laboratories N.V. by the weighted average number of common shares outstanding during the period. Diluted earnings per common and potential common shares include additional shares in the weighted average share calculations associated with the incremental effect of dilutive restricted stock awards and contingently issuable shares, as determined using the treasury stock method. The following table summarizes the calculation of weighted average common shares outstanding used in the computation of diluted earnings per share (in thousands):



	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2017	2016	2017	2016
Weighted average basic common shares outstanding	44,164	43,297	44,162	42,839
Effect of dilutive securities:
Performance shares	148	127	143	105
Restricted stock	62	81	55	64
Weighted average diluted common and potential common shares outstanding	44,374	43,505	44,360	43,008