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Nature of Business and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jul. 31, 2019 | Dec. 31, 2021 | Dec. 31, 2020
Summary of Significant Accounting Policies [Line Items] |  |  |
Amount of off balance sheet settlement funds |  | $ 272,800,000 | $ 246,800,000
Goodwill |  | 1,280,226,000 | 1,280,226,000
Goodwill, impairment loss |  | 0 |
Banks |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Goodwill |  | 725,900,000 |
Merchants |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Goodwill |  | 137,300,000 |
Billers |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Goodwill |  | $ 417,000,000 |
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 |  | $ 419,000,000 | $ 424,500,000
India Payment Technology and Services Company |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Payments to acquire investment interest | $ 18,300,000 |  |
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 |  | $ 19,300,000 |
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 |

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