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Segment Information - Selected Financial Data (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]
Revenues	$ 306,591	$ 316,914	$ 970,096	$ 903,769
Depreciation and amortization	(32,140)	(33,380)	(95,869)	(100,366)
Stock-based compensation expense	(7,126)	(6,367)	(21,884)	(20,790)
Corporate and unallocated expenses	(43,167)	(46,066)	(124,574)	(133,593)
Interest, net	(11,341)	(8,374)	(27,809)	(25,390)
Other, net	41,545	(1,088)	45,801	(1,036)
Income before income taxes	33,693	18,517	73,604	20,667
Operating Segments | Banks
Segment Reporting Information [Line Items]
Revenues	117,439	131,744	391,583	341,712
Segment Adjusted EBITDA	49,793	67,602	184,667	159,262
Operating Segments | Merchants
Segment Reporting Information [Line Items]
Revenues	35,609	38,989	113,145	115,083
Segment Adjusted EBITDA	9,781	14,221	32,243	41,987
Operating Segments | Billers
Segment Reporting Information [Line Items]
Revenues	153,543	146,181	465,368	446,974
Segment Adjusted EBITDA	$ 26,348	$ 31,969	$ 81,029	$ 100,593

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