Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Current federal tax expense (benefit), value added taxes	$ 4,100	$ 3,000	$ 2,500
Theoretical group tax-rates	34.43%	34.43%	34.43%
Deferred tax assets, valuation allowance	$ 19,821	$ 23,980	$ 19,863
Duration of tax plan (in years)	3 years
Deferred tax assets, changes related to recognition of deferred tax assets	$ 8,500
Foreign Tax Authority | America - IRS
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, subject to expiration	14,900
Foreign Tax Authority | China - State Administration of Taxation
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, subject to expiration	3,600
Foreign Tax Authority | United Kingdom - HMRC
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, not subject to expiration	4,800
Criteo Corp., Criteo Do Brasil, Criteo Ltd and Criteo Advertising (Beijing) Co. Ltd
Operating Loss Carryforwards [Line Items]
Deferred tax assets, valuation allowance	19,900	24,000	26,100
Criteo Corp
Operating Loss Carryforwards [Line Items]
Deferred tax assets, valuation allowance	900	12,400	13,900
Criteo Do Brasil
Operating Loss Carryforwards [Line Items]
Deferred tax assets, valuation allowance	3,600	3,900	2,600
Criteo Ltd
Operating Loss Carryforwards [Line Items]
Deferred tax assets, valuation allowance	4,700	4,700	7,700
Criteo China
Operating Loss Carryforwards [Line Items]
Deferred tax assets, valuation allowance	3,700	1,400	700
Criteo France
Operating Loss Carryforwards [Line Items]
Deferred tax assets, valuation allowance	$ 3,000	$ 600	$ 700