CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total		Share capital	Treasury Stock	Additional paid-in capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings		Equity - attributable to shareholders of Criteo S.A.		Non controlling interest
Beginning balance (in shares) at Dec. 31, 2018			67,708,203	(3,459,119)
Beginning balance at Dec. 31, 2018	$ 967,891		$ 2,201	$ (79,159)	$ 663,281	$ (30,522)	$ 387,869		$ 943,670		$ 24,221
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	21,401						19,120		19,120		2,281
Other comprehensive income (loss)	(11,545)					(11,347)			(11,347)		(198)
Issuance of ordinary shares (in shares)			28,596
Issuance of ordinary shares	373		$ 1		372				373
Change in treasury stocks (in shares)			(1,594,288)	1,786,715
Change in treasury stocks			$ (45)	$ 40,080	(36,091)		(3,944)
Share-Based Compensation	13,522				13,533				13,533		(11)
Other changes in equity	154				(1)		155		154
Ending Balance (in shares) at Mar. 31, 2019			66,142,511	(1,672,404)
Ending Balance at Mar. 31, 2019	991,796		$ 2,157	$ (39,079)	641,094	(41,869)	403,200		965,503		26,293
Beginning balance (in shares) at Dec. 31, 2018			67,708,203	(3,459,119)
Beginning balance at Dec. 31, 2018	967,891		$ 2,201	$ (79,159)	663,281	(30,522)	387,869		943,670		24,221
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	33,938
Other comprehensive income (loss)	(2,532)
Ending Balance (in shares) at Jun. 30, 2019			66,161,523	(1,118,969)
Ending Balance at Jun. 30, 2019	1,024,963		$ 2,157	$ (26,564)	652,572	(33,293)	401,209		996,081		28,882
Beginning balance (in shares) at Mar. 31, 2019			66,142,511	(1,672,404)
Beginning balance at Mar. 31, 2019	991,796		$ 2,157	$ (39,079)	641,094	(41,869)	403,200		965,503		26,293
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,537						10,823		10,823		1,714
Other comprehensive income (loss)	9,013					8,246			8,246		767
Issuance of ordinary shares (in shares)			19,012
Issuance of ordinary shares	252				252				252
Change in treasury stocks (in shares)				553,435
Change in treasury stocks				$ 12,515			(12,515)
Share-Based Compensation	11,362				11,254				11,254		108
Other changes in equity	3				(28)	330	(299)		3
Ending Balance (in shares) at Jun. 30, 2019			66,161,523	(1,118,969)
Ending Balance at Jun. 30, 2019	$ 1,024,963		$ 2,157	$ (26,564)	652,572	(33,293)	401,209		996,081		28,882
Beginning balance (in shares) at Dec. 31, 2019	66,197,181		66,197,181	(3,903,673)
Beginning balance at Dec. 31, 2019	$ 1,037,988		$ 2,158	$ (74,900)	668,389	(40,105)	451,725		1,007,267		30,721
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	16,428						15,459		15,459		969
Other comprehensive income (loss)	(14,198)					(14,178)			(14,178)		(20)
Issuance of ordinary shares (in shares)			5,700
Issuance of ordinary shares	39				39				39
Change in treasury stocks (in shares)				(629,977)
Change in treasury stocks	(18,239)			$ (4,934)			(13,305)		(18,239)
Share-Based Compensation	8,131				8,082				8,082		49
Other changes in equity	(3,541)	[1]					(3,399)	[1]	(3,399)	[1]	(142)
Ending Balance (in shares) at Mar. 31, 2020			66,202,881	(4,533,650)
Ending Balance at Mar. 31, 2020	$ 1,026,608		$ 2,158	$ (79,834)	676,510	(54,283)	450,480		995,031		31,577
Beginning balance (in shares) at Dec. 31, 2019	66,197,181		66,197,181	(3,903,673)
Beginning balance at Dec. 31, 2019	$ 1,037,988		$ 2,158	$ (74,900)	668,389	(40,105)	451,725		1,007,267		30,721
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	22,578
Other comprehensive income (loss)	$ (3,971)
Ending Balance (in shares) at Jun. 30, 2020	66,204,881		66,204,881	(5,589,408)
Ending Balance at Jun. 30, 2020	$ 1,034,997		$ 2,158	$ (90,714)	683,288	(44,297)	452,247		1,002,682		32,315
Beginning balance (in shares) at Mar. 31, 2020			66,202,881	(4,533,650)
Beginning balance at Mar. 31, 2020	1,026,608		$ 2,158	$ (79,834)	676,510	(54,283)	450,480		995,031		31,577
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,150						5,716		5,716		434
Other comprehensive income (loss)	10,227					9,986			9,986		241
Issuance of ordinary shares (in shares)			2,000
Issuance of ordinary shares	13				13				13
Change in treasury stocks (in shares)				(1,055,758)
Change in treasury stocks	(14,861)			$ (10,880)			(3,981)		(14,861)
Share-Based Compensation	6,804				6,765				6,765		39
Other changes in equity	$ 56						32		32		24
Ending Balance (in shares) at Jun. 30, 2020	66,204,881		66,204,881	(5,589,408)
Ending Balance at Jun. 30, 2020	$ 1,034,997		$ 2,158	$ (90,714)	$ 683,288	$ (44,297)	$ 452,247		$ 1,002,682		$ 32,315

[1] From January 1, 2020, we adopted ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost issued by the Financial Accounting Standards Board (FASB).