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v3.21.1

Condensed Consolidated Financial Statements - Additional Information (Details) - USD ($) $ in Thousands | 1 Months Ended |  |
--- | --- | --- | ---
Jul. 31, 2019 | Mar. 31, 2021 | Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items] |  |  |
Amount of off balance sheet settlement funds |  | $ 174,000 | $ 246,800
Goodwill |  | 1,280,226 | 1,280,226
ACI On Demand |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Goodwill |  | 554,300 |
ACI On Premise |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Goodwill |  | 725,900 |
India payment technology and services company |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Payments to acquire investment interest | $ 18,300 |  |
Percentage of voting interests acquired | 30.00% |  |
Equity method investment, amount recorded |  | $ 18,800 | 19,300
Level 2 | Senior Notes | 5.750% Senior Notes due 2026 |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Stated interest rate (percentage) |  | 5.75% |
Fair value of long-term debt |  | $ 424,000 | $ 424,500

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