Segment Information - Schedule of Revenues by Primary Solution Categories, Geographical Location and Long Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 451,752	$ 363,015	$ 1,141,250	$ 976,016
Long-lived Assets
Long-lived assets	1,942,711		1,942,711		$ 1,979,595
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	241,054	226,911	698,704	633,379
Long-lived Assets
Long-lived assets	1,155,409		1,155,409		1,216,158
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	210,698	136,104	442,546	342,637
Long-lived Assets
Long-lived assets	787,302		787,302		$ 763,437
Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	179,601	171,064	546,276	507,229
Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	50,120	36,267	123,865	107,556
Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	18,451	16,543	39,145	38,051
Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	45,376	26,374	96,553	72,271
Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	158,204	112,767	335,411	250,909
License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	157,429	79,679	252,984	142,681
Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	47,559	51,942	144,046	153,436
Operating Segments \| Banks
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	222,031	155,684	471,109	361,231
Operating Segments \| Banks \| Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0	0
Operating Segments \| Banks \| Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0	0
Operating Segments \| Banks \| Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	18,451	16,543	39,145	38,051
Operating Segments \| Banks \| Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	45,376	26,374	96,553	72,271
Operating Segments \| Banks \| Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	158,204	112,767	335,411	250,909
Operating Segments \| Banks \| Software as a service and platform as a service
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	11,697	10,167	33,924	29,158
Operating Segments \| Banks \| License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	143,338	77,779	235,357	136,980
Operating Segments \| Banks \| Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	43,916	48,084	133,215	142,050
Operating Segments \| Banks \| Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	23,080	19,654	68,613	53,043
Operating Segments \| Merchants
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	50,120	36,267	123,865	107,556
Operating Segments \| Merchants \| Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0	0
Operating Segments \| Merchants \| Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	50,120	36,267	123,865	107,556
Operating Segments \| Merchants \| Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0	0
Operating Segments \| Merchants \| Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0	0
Operating Segments \| Merchants \| Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	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	32,069	30,162	94,298	89,660
Operating Segments \| Merchants \| License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	14,091	1,900	17,627	5,701
Operating Segments \| Merchants \| Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,643	3,834	10,831	11,314
Operating Segments \| Merchants \| Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	317	371	1,109	881
Operating Segments \| Billers
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	179,601	171,064	546,276	507,229
Operating Segments \| Billers \| Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	179,601	171,064	546,276	507,229
Operating Segments \| Billers \| Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0	0
Operating Segments \| Billers \| Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0	0
Operating Segments \| Billers \| Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0	0
Operating Segments \| Billers \| Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	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	179,601	171,040	546,276	507,157
Operating Segments \| Billers \| License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0	0
Operating Segments \| Billers \| Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	24	0	72
Operating Segments \| Billers \| Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0