CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 5,293	$ 20,557	$ 27,871	$ 54,495
Foreign currency translation differences, net of taxes	25,660	(24,202)	21,312	(25,096)
Actuarial (losses) gains on employee benefits, net of taxes	(377)	(689)	0	(2,327)
Other comprehensive income (loss)	25,283	(24,891)	21,312	(27,423)
Total comprehensive income (loss)	30,576	(4,334)	49,183	27,072
Attributable to shareholders of Criteo S.A.	29,866	(6,015)	46,849	20,827
Attributable to non-controlling interests	$ 710	$ 1,681	$ 2,334	$ 6,245