Segment Information - Segment Operating Results (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenue	$ 280,650	$ 297,290	$ 923,020	$ 868,943
Segment Gross Profit	175,639	193,123	601,477	554,009
Segment Adjusted EBITDA	65,432	102,359	265,149	304,045
Marketing Services
Segment Reporting Information [Line Items]
Revenue	197,174	213,210	632,277	643,938
Segment Gross Profit	126,846	149,252	415,130	442,244
Segment Adjusted EBITDA	61,802	96,231	211,871	277,546
SaaS
Segment Reporting Information [Line Items]
Revenue	55,353	44,800	153,863	123,437
Segment Gross Profit	33,827	27,753	95,328	76,234
Segment Adjusted EBITDA	398	(5,508)	(3,769)	(7,311)
International Marketing Services
Segment Reporting Information [Line Items]
Revenue	26,833	39,149	133,715	101,428
Segment Gross Profit	14,351	16,347	89,694	35,755
Segment Adjusted EBITDA	5,807	14,013	64,449	36,182
International SaaS
Segment Reporting Information [Line Items]
Revenue	1,290	131	3,165	140
Segment Gross Profit	615	(229)	1,325	(224)
Segment Adjusted EBITDA	$ (2,575)	$ (2,377)	$ (7,402)	$ (2,372)