Net Income per Share

6 Months Ended

Jun. 30, 2019

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 and six months ended June 30, 2019 and 2018 the weighted-average ordinary shares outstanding for basic and diluted net income per share were as follows:

	For the three months ended		For the six months ended
	June 30, 2019	June 30, 2018	June 30, 2019	June 30, 2018
Basic weighted-average ordinary shares outstanding	161,618	171,439	162,433	171,422
Dilutive effect of stock options	568	883	601	905
Dilutive effect of unvested restricted securities	292	371	466	448
Diluted weighted-average ordinary shares outstanding	162,478	172,693	163,500	172,775

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 are as follows:

	For the three months ended		For the six months ended
	June 30, 2019	June 30, 2018	June 30, 2019	June 30, 2018
Anti-dilutive shares excluded	1,358	989	1,185	849
Contingently issuable shares excluded	794	808	635	798