Earnings Per Share - Basic Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Net income attributable to shareholders of Criteo S.A.	$ 82,272	$ 59,553	$ 45,556
Weighted average shares outstanding, basic (in shares)	63,337,792	61,835,499	58,928,563
Basic earnings per share (in dollars per share)	$ 1.30	$ 0.96	$ 0.77