Pension and Other Postretirement Benefits - Schedule of Funded Status of the Plans (Detail) £ in Thousands, $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2022 GBP (£)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 GBP (£)	Dec. 31, 2020 USD ($)
Foreign Defined Benefits Pension Plans [Member]
Funded status of the plans:
Fair value of plan assets	$ 41,679	£ 34,475	$ 71,614	£ 53,008
Defined Benefit Pension Plan [Member] | U.S. [Member]
Funded status of the plans:
Fair value of plan assets	161,374		214,937		$ 210,880
Less benefit obligations	193,670		260,301		273,776
Funded status at December 31	(32,296)		(45,364)
Defined Benefit Pension Plan [Member] | Foreign Defined Benefits Pension Plans [Member]
Funded status of the plans:
Fair value of plan assets	41,679		71,614		66,957
Less benefit obligations	39,319		67,007		69,923
Funded status at December 31	2,360		4,607
Other Postretirement Benefit Plans [Member]
Funded status of the plans:
Less benefit obligations	7,644		10,430		$ 11,410
Funded status at December 31	$ (7,644)		$ (10,430)