Acquisitions - Narrative (Details) $ in Thousands					1 Months Ended								2 Months Ended		3 Months Ended		6 Months Ended
	Apr. 20, 2021 USD ($)	May 19, 2020 USD ($) lease	Apr. 06, 2020 USD ($)	Jan. 31, 2020 USD ($)	Jun. 30, 2021 USD ($)	May 31, 2021 shares	Apr. 30, 2021 USD ($) transaction	Feb. 28, 2021 USD ($)	Jan. 31, 2021 USD ($)	Nov. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Apr. 30, 2020 USD ($) developer app transaction	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)
Business Acquisition [Line Items]
Business combination, equity interests issued and issuable																	$ 0	$ 38,167
Consideration transferred, liabilities incurred																	342,170	0
Transactions | transaction														2
Payments for asset acquisitions														$ 35,000
Asset acquisition, consideration transferred														$ 35,000
Development services agreement, term														2 years
Asset acquisition, earn-out term														4 years
Contingent consideration, costs																$ 7,800		$ 13,700
Annual earn-out payment period												4 years
Apps acquired | app														2
Game developers | developer														2
Development services agreement, renewal, term														2 years
Asset acquisition, baseline revenue, cumulative amount (up to)														$ 45,000
Exit Of Machine Zone Real Estate Leases
Business Acquisition [Line Items]
Number of businesses exited | lease		1
Increase (decrease) in operating lease, right-of-use asset		$ 57,600
Increase (decrease) in operating lease, liability		63,100
Leasehold improvements, write off		15,000
Adjustments to additional paid in capital, warrants issued		400
Adjust GmbH
Business Acquisition [Line Items]
Consideration transferred	$ 967,800
Consideration transferred, liabilities incurred	342,200
Consideration paid	578,000
Liabilities incurred, cash holdback	47,600
Transaction costs	3,100
Expected tax deductible amount for goodwill	692,500
Revenue of acquiree since acquisition date													$ 21,600
Earnings (loss) of acquiree since acquisition date													$ (19,200)
Conversion of stock (in shares) | shares						6,320,688
Total purchase consideration	967,817
Adjust GmbH | Reported Value Measurement
Business Acquisition [Line Items]
Consideration transferred	980,000
Business combination, equity interests issued and issuable	352,000
Consideration transferred, liabilities incurred	$ 50,000
Certain Mobile Game Apps
Business Acquisition [Line Items]
Transactions | transaction							2
Payments for asset acquisitions					$ 130,000		$ 300,000								$ 8,000		8,000
Asset acquisition, transaction cost					4,000		6,000
Asset acquisition, consideration transferred					$ 134,000		$ 306,000
Acquired asset, amortization period					9 years		8 years
Development services agreement, term					4 years		4 years
Asset acquisition, earn-out term							4 years
Asset acquisition, earn-out payment							$ 50,000
Contingent consideration, costs															51,800		87,600
2020 Asset Acquisition
Business Acquisition [Line Items]
Contingent consideration, costs															$ 40,700		$ 67,900
2020 Mobile App Acquisition
Business Acquisition [Line Items]
Payments for asset acquisitions									$ 60,000
2019 Asset Acquisition
Business Acquisition [Line Items]
Payments for asset acquisitions								$ 90,000
Geewa A S
Business Acquisition [Line Items]
Consideration transferred				$ 25,600
Consideration paid				23,500
Consideration indemnity holdback				2,100
Business combination acquisition related costs				300
Total purchase consideration				$ 25,629
Redemption Games
Business Acquisition [Line Items]
Consideration transferred			$ 53,700
Transaction costs			$ 600
Percentage of voting interests acquired			95.50%
Total purchase consideration			$ 56,232
Business combination, ownership interest										0.982
Fair value of minority shares			$ 2,556
Redemption Games | Convertible Securities Convertible Into Class A Common Stock
Business Acquisition [Line Items]
Business combination, exchange of minority shares										0.027
Redemption Games | Class A Common Stock
Business Acquisition [Line Items]
Business combination, equity interests issued and issuable										$ 4,500
Redemption Games | Minority Shares
Business Acquisition [Line Items]
Fair value of minority shares										$ 1,500
Machine Zone
Business Acquisition [Line Items]
Consideration transferred		328,600
Business combination, equity interests issued and issuable		38,200
Consideration paid		287,100
Transaction costs		2,800
Revenue of acquiree since acquisition date											$ 17,800
Earnings (loss) of acquiree since acquisition date											$ 32,200
Total purchase consideration		328,555
Business combination, settlement of receivables		3,300
Machine Zone | IP License
Business Acquisition [Line Items]
Business combination, remaining future fixed payments		$ 37,100
Zenlife
Business Acquisition [Line Items]
Payments for asset acquisitions												$ 160,000
Asset acquisition, consideration transferred												$ 173,300
Acquired asset, amortization period												5 years
Development services agreement, term												4 years
Asset acquisition, deferred tax liability												$ 13,300
Mobile App One
Business Acquisition [Line Items]
Acquired asset, amortization period														3 years
Mobile App Two
Business Acquisition [Line Items]
Acquired asset, amortization period														5 years