Segment Information - Selected Financial Data (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 285,186	$ 291,485
Depreciation and amortization	(33,583)	(33,822)
Stock-based compensation expense	(6,703)	(6,950)
Corporate and unallocated expenses	(41,965)	(49,599)
Interest, net	(8,621)	(14,271)
Other, net	(1,382)	(9,758)
Loss before income taxes	(6,313)	(35,312)
Operating Segments \| Banks
Segment Reporting Information [Line Items]
Revenues	95,917	105,821
Segment Adjusted EBITDA	37,195	42,436
Operating Segments \| Merchants
Segment Reporting Information [Line Items]
Revenues	38,670	31,795
Segment Adjusted EBITDA	14,725	6,418
Operating Segments \| Billers
Segment Reporting Information [Line Items]
Revenues	150,599	153,869
Segment Adjusted EBITDA	$ 34,021	$ 30,234

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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