Segment Information - Selected Financial Data (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 1,421,901	$ 1,370,598	$ 1,294,322
Depreciation and amortization	(127,328)	(133,393)	(140,316)
Stock-based compensation expense	(29,753)	(27,242)	(29,602)
Corporate and unallocated expenses	(166,501)	(185,731)	(205,310)
Interest, net	(40,646)	(33,538)	(45,002)
Other, net	43,446	(1,294)	(1,116)
Income before income taxes	206,635	175,065	98,626
Operating Segments | Banks
Segment Reporting Information [Line Items]
Revenues	638,585	625,125	558,498
Segment Adjusted EBITDA	371,017	372,949	331,445
Operating Segments | Merchants
Segment Reporting Information [Line Items]
Revenues	153,905	152,988	149,342
Segment Adjusted EBITDA	49,029	54,266	53,383
Operating Segments | Billers
Segment Reporting Information [Line Items]
Revenues	629,411	592,485	586,482
Segment Adjusted EBITDA	$ 107,371	$ 129,048	$ 135,144