Segment Information - Reconciliation of U.S. GAAP Income (Loss) Before Income Taxes to Adjusted EBITDA (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Loss on mark-to-market adjustment of contingent consideration			$ 189	$ 4,494
Interest income	$ 5,900	$ 4,800	17,500	11,700
Currency gains on acquisition-related intercompany loans	$ 3,800	2,800
Currency losses on acquisition-related intercompany loans			2,800	300
World Programming [Member]
Segment Reporting Information [Line Items]
Loss on mark-to-market adjustment of contingent consideration		$ 3,500	$ 200	$ 4,500