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Acquisitions - Additional Information (Details) $ in Thousands, £ in Millions | Mar. 31, 2021 USD ($) | Mar. 31, 2021 GBP (£) | Jan. 31, 2020 USD ($)
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Silver Lake Transaction [Member] |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Fair value of consideration transferred |  |  | $ 1,575,958
Cash, net of cash acquired |  |  | 1,556,810
Closing costs & transaction expenses |  |  | $ 31,800
March 2021 U K Acquisition [Member] |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Cash, net of cash acquired | $ 7,588 | £ 5.4 |

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