Goodwill and Intangible Assets - Textual (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Impairment loss	$ 0	$ 0
Goodwill, impaired, accumulated impairment loss	0	0
Impairment and other losses	16,240	0
Amortization expense	56,774	$ 30,881
Integrated Agencies Network and Media Network
Goodwill [Line Items]
Impairment and other losses	$ 16,187
Weighted Average
Goodwill [Line Items]
Finite-lived intangible asset useful life	10 years
Customer Relationships
Goodwill [Line Items]
Finite-lived intangible asset useful life	8 years
Trademarks
Goodwill [Line Items]
Finite-lived intangible asset useful life	11 years
Noncompete Agreements
Goodwill [Line Items]
Finite-lived intangible asset useful life	4 years
Other Intangible Assets
Goodwill [Line Items]
Finite-lived intangible asset useful life	2 years