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Revenues - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Revenue From Contract With Customer [Line Items] |  |  |
Current deferred revenues | $ 185.2 |  | $ 190.5
Revenue recognized | 103.4 |  |
Cancelled event liabilities | $ 1.2 |  | 1.2
Maximum [Member] |  |  |
Revenue From Contract With Customer [Line Items] |  |  |
Contracts with customers sales beginning period | 1 year |  |
Contracts with customers commission benefited expected period | 1 year |  |
Payment term | 60 days |  |
Minimum [Member] |  |  |
Revenue From Contract With Customer [Line Items] |  |  |
Payment term | 30 days |  |
Trade Show and Other Events [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member] |  |  |
Revenue From Contract With Customer [Line Items] |  |  |
Concentration risk, percentage | 93.60% | 92.50% |
Trade Shows [Member] | COVID-19 [Member] |  |  |
Revenue From Contract With Customer [Line Items] |  |  |
Current deferred revenues | $ 0.8 |  |
Accounts receivable credits reclassified to cancelled event liabilities | $ 0.4 |  | $ 1.1

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