Segment Information - Schedule of Revenues by Primary Solution Categories, Geographical Location and Long Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 373,479	$ 323,325	$ 689,498	$ 613,001
Long-lived Assets
Long-lived assets	1,922,232		1,922,232		$ 1,979,595
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	229,543	205,199	457,650	406,468
Long-lived Assets
Long-lived assets	1,182,509		1,182,509		1,216,158
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	143,936	118,126	231,848	206,533
Long-lived Assets
Long-lived assets	739,723		739,723		$ 763,437
Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	191,813	169,310	366,675	336,165
Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	38,017	36,508	73,745	71,289
Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	9,187	12,153	20,694	21,508
Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	26,429	26,499	51,177	45,897
Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	108,033	78,855	177,207	138,142
License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	65,582	44,671	95,555	63,002
Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	48,733	51,391	96,487	101,494
Operating Segments \| Banks
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	143,649	117,507	249,078	205,547
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	9,187	12,153	20,694	21,508
Operating Segments \| Banks \| Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	26,429	26,499	51,177	45,897
Operating Segments \| Banks \| Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	108,033	78,855	177,207	138,142
Operating Segments \| Banks \| Software as a service and platform as a service
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	11,709	9,742	22,227	18,991
Operating Segments \| Banks \| License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	63,486	42,885	92,019	59,201
Operating Segments \| Banks \| Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	44,973	47,624	89,299	93,966
Operating Segments \| Banks \| Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	23,481	17,256	45,533	33,389
Operating Segments \| Merchants
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	38,017	36,508	73,745	71,289
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	38,017	36,508	73,745	71,289
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	31,877	30,648	62,229	59,498
Operating Segments \| Merchants \| License
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,096	1,786	3,536	3,801
Operating Segments \| Merchants \| Maintenance
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,760	3,743	7,188	7,480
Operating Segments \| Merchants \| Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	284	331	792	510
Operating Segments \| Billers
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	191,813	169,310	366,675	336,165
Operating Segments \| Billers \| Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	191,813	169,310	366,675	336,165
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	191,813	169,286	366,675	336,117
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	48
Operating Segments \| Billers \| Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0