Segment Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments (in segments) | segment	2
Operating revenues	$ 362,169	$ 340,514
Operating expenses	303,320	259,129
Operating income	58,849	81,385
Operating segments | Account Services
Segment Reporting Information [Line Items]
Operating revenues	245,350	239,633
Operating expenses	211,543	176,787
Operating income	33,807	62,846
Operating segments | Processing and Settlement Services
Segment Reporting Information [Line Items]
Operating revenues	125,630	110,649
Operating expenses	67,319	54,515
Operating income	58,311	56,134
Corporate and Other
Segment Reporting Information [Line Items]
Operating revenues	(8,811)	(9,768)
Operating expenses	24,458	27,827
Operating income	$ (33,269)	$ (37,595)