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Acquisitions - Additional Information (Details) $ in Thousands, £ in Millions				3 Months Ended	12 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2021 GBP (£)	Jan. 31, 2020 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
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		$ 7,600

X

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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The expenses and losses recorded for each transaction with the acquiree that was recognized separately from the acquisition of assets and assumptions of liabilities in the business combination.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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