Earnings per Share

3 Months Ended

Mar. 31, 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
	March 31,
	2017	2016
Weighted average basic common shares outstanding	44,159	42,380
Effect of dilutive securities:
Performance shares	138	83
Restricted stock	50	57
Weighted average diluted common and potential common shares outstanding	44,347	42,520