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Acquisitions - Additional Information (Detail) - USD ($) $ in Millions			12 Months Ended
	Mar. 06, 2020	Jan. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Total consideration transferred			$ 9.6	$ 102.7
Goodwill acquired during period net of assets acquired			2.8	$ 48.7
Measurement period adjustments			$ 0.3
Ed Broking [Member]
Business Acquisition [Line Items]
Business acquisition date		Jan. 31, 2019
Algomi Limited [Member]
Business Acquisition [Line Items]
Business acquisition date	Mar. 06, 2020

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Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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