Earnings per Share

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Earnings per Share

11. EARNINGS PER SHARE

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,
	2020		2019
Weighted average basic common shares      outstanding		44,447		44,323
Effect of dilutive securities:
Performance shares		—		393
Restricted stock		—		18
Weighted average diluted common and       potential common shares outstanding		44,447		44,734