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Acquisitions - Schedule of Business Acquisitions (Details) - USD ($) | Apr. 13, 2021 | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Non-controlling interest | $ 0 | $ 0 | $ 13,022,000
WEX Europe Services |  |  |
Business Acquisition [Line Items] |  |  |
Purchase price | 96,992,000 |  |
Change in value of redeemable non-controlling interest | (13,077,000) |  |
Accumulated other comprehensive income | (2,284,000) |  |
Additional paid-in capital | $ (81,631,000) |  |

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