Nature of Business and Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2019 USD ($)	Dec. 31, 2023 USD ($) vote	Dec. 31, 2022 USD ($)
Summary of Significant Accounting Policies [Line Items]
Common stock, number of votes | vote		1
Amount of off balance sheet settlement funds		$ 273,200	$ 328,700
Goodwill		1,226,026	1,226,026
Banks
Summary of Significant Accounting Policies [Line Items]
Goodwill		671,700
Merchants
Summary of Significant Accounting Policies [Line Items]
Goodwill		137,300
Billers
Summary of Significant Accounting Policies [Line Items]
Goodwill		$ 417,000
Level 2 | Senior Notes | 5.750% Senior Notes due 2026
Summary of Significant Accounting Policies [Line Items]
Stated interest rate (percentage)		5.75%
Fair value of long-term debt		$ 398,500	390,000
India Payment Technology and Services Company
Summary of Significant Accounting Policies [Line Items]
Payments to acquire investment interest	$ 18,300
Percentage of voting interests acquired	30.00%
India Payment Technology and Services Company | Other Noncurrent Assets
Summary of Significant Accounting Policies [Line Items]
Equity method investment, carrying amount		$ 18,500	$ 17,900
Software for Resale | Minimum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		5 years
Software for Resale | Maximum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		10 years
Software for internal use | Minimum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		3 years
Software for internal use | Maximum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		8 years
Other Intangible Assets | Minimum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		4 years
Other Intangible Assets | Maximum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		20 years