Segment Information - Selected Financial Data (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 323,080	$ 285,186
Depreciation and amortization	(31,489)	(33,583)
Stock-based compensation expense	(7,958)	(6,703)
Corporate and unallocated expenses	(38,671)	(41,965)
Interest, net	(7,735)	(8,621)
Other, net	2,250	(1,382)
Income (loss) before income taxes	22,181	(6,313)
Operating Segments \| Banks
Segment Reporting Information [Line Items]
Revenues	132,198	95,917
Segment Adjusted EBITDA	64,714	37,195
Operating Segments \| Merchants
Segment Reporting Information [Line Items]
Revenues	41,002	38,670
Segment Adjusted EBITDA	14,713	14,725
Operating Segments \| Billers
Segment Reporting Information [Line Items]
Revenues	149,880	150,599
Segment Adjusted EBITDA	$ 26,357	$ 34,021

Other operating expenses related to corporate functions and not allocated to reportable segments.

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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