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Customer Funds - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Investments Debt And Equity Securities [Abstract] |  |
Investment income from invested customer funds included in recurring revenue | $ 10.7 | $ 19.6

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Period Type: | duration

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- References No definition available. + Details
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