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Nature of Business and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 23, 2019 | Dec. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Other current assets |  | $ 24,200 |  | $ 14,260
Other current liabilities |  | 76,971 |  | 61,688
Settlement assets |  | 391,039 |  | 32,256
Settlement liabilities |  | 368,719 |  | 31,605
Amount of off balance sheet settlement funds |  | $ 274,000 |  | 256,500
Goodwill measurement period |  | 1 year |  |
Right-of-use assets |  | $ 57,382 |  | 0
Operating lease liability |  | $ 61,815 |  |
Accounting Standards Update 2016-02 |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Right-of-use assets |  |  | $ 63,300 |
Operating lease liability |  |  | $ 68,600 |
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 |  | $ 432,000 |  | 395,000
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% |  |  |
Equity method investments, initial amount recorded | $ 18,500 |  |  |
Software for resale | Minimum |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life |  | 5 years |  |
Software for internal use | Minimum |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life |  | 1 year |  |
Software for internal use | Maximum |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life |  | 10 years |  |
Other intangible assets | Minimum |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life |  | 3 years |  |
Other intangible assets | Maximum |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life |  | 20 years |  |
Prior Period Adjustment |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Other current assets |  |  |  | (32,300)
Other current liabilities |  |  |  | (31,600)
Settlement assets |  |  |  | 32,300
Settlement liabilities |  |  |  | $ 31,600

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