Segment Information - Revenue by Primary Solution Category for Reportable Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,421,901	$ 1,370,598	$ 1,294,322
Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	629,411	592,485	586,482
Digital Business Banking
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	35,504	60,398	75,475
Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	153,905	152,988	149,342
Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	47,421	43,704	32,942
Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	104,777	77,922	80,654
Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	450,883	443,101	369,427
Operating Segments | Banks
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	638,585	625,125	558,498
Operating Segments | Banks | Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0
Operating Segments | Banks | Digital Business Banking
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	35,504	60,398	75,475
Operating Segments | Banks | Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0
Operating Segments | Banks | Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	47,421	43,704	32,942
Operating Segments | Banks | Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	104,777	77,922	80,654
Operating Segments | Banks | Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	450,883	443,101	369,427
Operating Segments | Banks | Software as a service and platform as a service
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	48,932	57,339	69,254
Operating Segments | Banks | License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	336,028	310,758	232,143
Operating Segments | Banks | Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	184,017	193,332	194,400
Operating Segments | Banks | Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	69,608	63,696	62,701
Operating Segments | Merchants
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	153,905	152,988	149,342
Operating Segments | Merchants | Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0
Operating Segments | Merchants | Digital Business Banking
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0
Operating Segments | Merchants | Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	153,905	152,988	149,342
Operating Segments | Merchants | Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0
Operating Segments | Merchants | Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0
Operating Segments | Merchants | Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0
Operating Segments | Merchants | Software as a service and platform as a service
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	124,631	124,933	113,854
Operating Segments | Merchants | License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	12,106	9,015	14,659
Operating Segments | Merchants | Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	15,934	16,846	16,981
Operating Segments | Merchants | Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,234	2,194	3,848
Operating Segments | Billers
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	629,411	592,485	586,482
Operating Segments | Billers | Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	629,411	592,485	586,482
Operating Segments | Billers | Digital Business Banking
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0
Operating Segments | Billers | Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0
Operating Segments | Billers | Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0
Operating Segments | Billers | Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0
Operating Segments | Billers | Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0
Operating Segments | Billers | Software as a service and platform as a service
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	629,317	592,070	586,072
Operating Segments | Billers | License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	94	94
Operating Segments | Billers | Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	94	321	316
Operating Segments | Billers | Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 0	$ 0	$ 0