Segment Information - Schedule of Revenue by Primary Solution Category for Reportable Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,452,579	$ 1,421,901	$ 1,370,598
Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	685,912	629,411	592,485
Digital Business Banking
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,792	35,504	60,398
Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	150,616	153,905	152,988
Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	63,503	47,421	43,704
Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	128,957	104,777	77,922
Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	420,799	450,883	443,101
License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	321,224	348,134	319,867
Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	205,068	200,045	210,499
Operating Segments | Banks
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	616,051	638,585	625,125
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	2,792	35,504	60,398
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	63,503	47,421	43,704
Operating Segments | Banks | Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	128,957	104,777	77,922
Operating Segments | Banks | Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	420,799	450,883	443,101
Operating Segments | Banks | Software as a service and platform as a service
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	39,803	48,932	57,339
Operating Segments | Banks | License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	311,549	336,028	310,758
Operating Segments | Banks | Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	189,650	184,017	193,332
Operating Segments | Banks | Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	75,049	69,608	63,696
Operating Segments | Merchants
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	150,616	153,905	152,988
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	150,616	153,905	152,988
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	123,528	124,631	124,933
Operating Segments | Merchants | License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	9,675	12,106	9,015
Operating Segments | Merchants | Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	15,322	15,934	16,846
Operating Segments | Merchants | Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,091	1,234	2,194
Operating Segments | Billers
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	685,912	629,411	592,485
Operating Segments | Billers | Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	685,912	629,411	592,485
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	685,816	629,317	592,070
Operating Segments | Billers | License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	94
Operating Segments | Billers | Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	96	94	321
Operating Segments | Billers | Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 0	$ 0	$ 0