Segment Information - Selected Financial Data, Revenues and Long lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 316,019	$ 289,676
Long-lived Assets
Long-lived assets	1,945,582		$ 1,979,595
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	228,107	201,269
Long-lived Assets
Long-lived assets	1,209,207		1,216,158
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	87,912	88,407
Long-lived Assets
Long-lived assets	736,375		$ 763,437
Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	174,862	166,855
Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	35,728	34,781
Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	11,507	9,355
Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	24,748	19,398
Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	69,174	59,287
License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	29,973	18,331
Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	47,754	50,103
Operating Segments | Banks
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	105,429	88,040
Operating Segments | Banks | Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0
Operating Segments | Banks | Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0
Operating Segments | Banks | Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	11,507	9,355
Operating Segments | Banks | Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	24,748	19,398
Operating Segments | Banks | Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	69,174	59,287
Operating Segments | Banks | Software as a service and platform as a service
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	10,518	9,249
Operating Segments | Banks | License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	28,533	16,316
Operating Segments | Banks | Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	44,326	46,342
Operating Segments | Banks | Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	22,052	16,133
Operating Segments | Merchants
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	35,728	34,781
Operating Segments | Merchants | Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0
Operating Segments | Merchants | Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	35,728	34,781
Operating Segments | Merchants | Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0
Operating Segments | Merchants | Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0
Operating Segments | Merchants | Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	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	30,352	28,850
Operating Segments | Merchants | License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,440	2,015
Operating Segments | Merchants | Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,428	3,737
Operating Segments | Merchants | Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	508	179
Operating Segments | Billers
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	174,862	166,855
Operating Segments | Billers | Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	174,862	166,855
Operating Segments | Billers | Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0
Operating Segments | Billers | Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0
Operating Segments | Billers | Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0
Operating Segments | Billers | Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	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	174,862	166,831
Operating Segments | Billers | License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0
Operating Segments | Billers | Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	24
Operating Segments | Billers | Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 0	$ 0