Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Amortization Expense	$ 103,060	$ 61,054	$ 33,999
Goodwill, Impairment Loss	116,714
Impairment and other losses	122,179	16,240	$ 0
Goodwill, Impaired, Accumulated Impairment Loss	116,714
Restatement Adjustment
Finite-Lived Intangible Assets [Line Items]
Capitalized Computer Software, Gross	29,844
Capitalized Computer Software, Accumulated Amortization	$ 8,757
Weighted Average
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	13 years
Integrated Agencies Network and Brand Performance Network
Finite-Lived Intangible Assets [Line Items]
Impairment and other losses	$ 1,400	$ 16,187
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	14 years
Trademarks
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	12 years
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years