Segment Information - Selected Financial Data, Revenues and Long lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 285,186	$ 291,485
Long-lived assets
Long-lived assets	2,140,179		$ 2,174,513
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	191,977	204,793
Long-lived assets
Long-lived assets	1,407,528		1,423,862
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	93,209	86,692
Long-lived assets
Long-lived assets	732,651		$ 750,651
Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	150,599	153,869
Digital Business Banking
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	15,092	15,828
Merchant Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	38,670	31,795
Fraud Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	6,224	6,270
Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	13,185	18,236
Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	61,416	65,487
Operating Segments | Banks
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	95,917	105,821
Operating Segments | Banks | Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0
Operating Segments | Banks | Digital Business Banking
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	15,092	15,828
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	6,224	6,270
Operating Segments | Banks | Real-Time Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	13,185	18,236
Operating Segments | Banks | Issuing and Acquiring
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	61,416	65,487
Operating Segments | Merchants
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	38,670	31,795
Operating Segments | Merchants | Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0
Operating Segments | Merchants | Digital Business Banking
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	38,670	31,795
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 | Billers
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	150,599	153,869
Operating Segments | Billers | Bill Payments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	150,599	153,869
Operating Segments | Billers | Digital Business Banking
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0
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