Segment Information - Schedule of Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Revenues	$ 363,015	$ 306,591	$ 976,016	$ 970,096
Depreciation and amortization	(30,463)	(32,140)	(93,438)	(95,869)
Stock-based compensation expense	(6,822)	(7,126)	(17,537)	(21,884)
Corporate and unallocated expenses	(41,283)	(43,167)	(135,053)	(124,574)
Interest, net	(16,345)	(11,341)	(48,183)	(27,809)
Other, net	1,084	41,545	(6,403)	45,801
Income (loss) before income taxes	46,663	33,693	(6,494)	73,604
Operating Segments | Banks
Segment Reporting Information [Line Items]
Revenues	155,684	117,439	361,231	391,583
Segment Adjusted EBITDA	91,010	49,793	167,313	184,667
Operating Segments | Merchants
Segment Reporting Information [Line Items]
Revenues	36,267	35,609	107,556	113,145
Segment Adjusted EBITDA	10,296	9,781	26,751	32,243
Operating Segments | Billers
Segment Reporting Information [Line Items]
Revenues	171,064	153,543	507,229	465,368
Segment Adjusted EBITDA	$ 39,186	$ 26,348	$ 100,056	$ 81,029