Segment Information - Segment Operating Results (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Revenue	$ 251,421	$ 333,995	$ 496,976	$ 642,370
Segment Gross Profit	160,085	227,982	314,893	425,838
Segment Adjusted EBITDA	69,439	116,000	127,908	199,717
Marketing Services
Segment Reporting Information [Line Items]
Revenue	137,684	222,570	284,984	435,103
Segment Gross Profit	88,023	151,774	181,197	288,284
Segment Adjusted EBITDA	38,233	83,674	79,497	150,069
SaaS
Segment Reporting Information [Line Items]
Revenue	60,150	51,167	118,277	98,510
Segment Gross Profit	37,563	32,092	73,523	61,501
Segment Adjusted EBITDA	7,123	197	8,245	(4,167)
Marketing Services
Segment Reporting Information [Line Items]
Revenue	51,279	59,218	89,605	106,882
Segment Gross Profit	32,852	43,627	57,332	75,343
Segment Adjusted EBITDA	24,976	34,545	42,385	58,642
SaaS
Segment Reporting Information [Line Items]
Revenue	2,308	1,040	4,110	1,875
Segment Gross Profit	1,647	489	2,841	710
Segment Adjusted EBITDA	$ (893)	$ (2,416)	$ (2,219)	$ (4,827)