Goodwill and Intangible Assets - Schedule of Goodwill Rollforward (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Beginning balance	$ 566,004	$ 671,886
Impairments		(102,000)
Goodwill additions	5,129
Effects of foreign currency translation	(3,360)	(3,882)
Ending balance	567,773	566,004
Marketing Services
Goodwill [Roll Forward]
Beginning balance	288,573	390,573
Impairments		(102,000)
Goodwill additions	0
Effects of foreign currency translation	0	0
Ending balance	288,573	288,573
SaaS
Goodwill [Roll Forward]
Beginning balance	218,884	218,884
Impairments		0
Goodwill additions	0
Effects of foreign currency translation	0	0
Ending balance	218,884	218,884
Marketing Services
Goodwill [Roll Forward]
Beginning balance	58,547	62,429
Impairments		0
Goodwill additions	5,129
Effects of foreign currency translation	(3,360)	(3,882)
Ending balance	60,316	58,547
SaaS
Goodwill [Roll Forward]
Beginning balance	0	0
Impairments		0
Goodwill additions	0
Effects of foreign currency translation	0	0
Ending balance	$ 0	$ 0