Segment Information - Schedule of Selected Financial Data by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 316,019	$ 289,676
Depreciation and amortization	(27,609)	(31,539)
Stock-based compensation expense	(8,099)	(5,301)
Corporate and unallocated expenses	(37,758)	(48,378)
Interest, net	(15,001)	(15,387)
Other, net	(2,025)	(3,395)
Loss before income taxes	(7,466)	(43,134)
Operating Segments | Banks
Segment Reporting Information [Line Items]
Revenues	105,429	88,040
Segment Adjusted EBITDA	41,638	24,681
Operating Segments | Merchants
Segment Reporting Information [Line Items]
Revenues	35,728	34,781
Segment Adjusted EBITDA	10,651	6,544
Operating Segments | Billers
Segment Reporting Information [Line Items]
Revenues	174,862	166,855
Segment Adjusted EBITDA	$ 30,737	$ 29,641