Net Income per Share

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Net Income per Share

Net Income per Share

Basic and diluted net income per share are calculated by dividing net income by the number of basic and diluted weighted-average ordinary shares outstanding during the period. For the three months ended March 31, 2020 and 2019 the weighted-average ordinary shares outstanding used to calculate basic and diluted net income per share were as follows:

	For the three months ended
	March 31, 2020	March 31, 2019
Basic weighted-average ordinary shares outstanding	157,599	163,247
Dilutive effect of stock options	334	635
Dilutive effect of unvested restricted securities	452	639
Diluted weighted-average ordinary shares outstanding	158,385	164,521

Net income and net income per share are presented in the condensed consolidated statements of operations.

Certain potential ordinary shares were excluded from our calculation of diluted weighted-average ordinary shares outstanding because either they would have had an anti–dilutive effect on net income per share or they related to equity awards that were contingently issuable for which the contingency had not been satisfied. These potential ordinary shares were as follows:

	For the three months ended
	March 31, 2020	March 31, 2019
Anti-dilutive shares excluded	1,385	1,013
Contingently issuable shares excluded	596	477