Pension and Other Postretirement Benefits - Summary of Changes in the Fair Value of the Level 3 Plan Assets for the U.S. and Foreign Pension Benefits Plans (Detail) £ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2024 GBP (£)	Dec. 31, 2023 USD ($)
Foreign Defined Benefits Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, Beginning balance	$ 42,338	£ 33,257
Fair value of plan assets, Ending balance	36,101	£ 28,800	$ 42,338
Defined Benefit Pension Plan [Member] | U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, Beginning balance	163,929		161,374
Fair value of plan assets, Ending balance	158,704		163,929
Defined Benefit Pension Plan [Member] | Foreign Defined Benefits Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, Beginning balance	42,338		41,679
Fair value of plan assets, Ending balance	36,101		42,338
Defined Benefit Pension Plan [Member] | Alternative Investments [Member] | U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, Beginning balance	6,035
Fair value of plan assets, Ending balance	6,081		6,035
Defined Benefit Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, Beginning balance	5,714
Fair value of plan assets, Ending balance	5,645		5,714
Defined Benefit Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member] | Foreign Defined Benefits Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, Beginning balance	928		831
Transfers to other plan assets	(926)
Realized gains (losses)	14
Change in net unrealized gains (losses)			52
Other, primarily impact from changes in foreign currency exchange rates	(16)		45
Fair value of plan assets, Ending balance	0		928
Defined Benefit Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member] | Alternative Investments [Member] | U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, Beginning balance	5,714		6,569
Transfers to other plan assets	(299)		(627)
Realized gains (losses)	86		186
Change in net unrealized gains (losses)	144		(414)
Fair value of plan assets, Ending balance	$ 5,645		$ 5,714