Pension and Other Postretirement Benefits - Contributions for Pension and Other Postretirement Benefits (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Other Postretirement Benefit Plans [Member]
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Contribution	$ 273	$ 325
U.S. [Member] | Defined Benefit Pension Plan [Member]
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Contribution	4,641	207
U.S. [Member] | Defined Contribution Plan [Member]
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Contribution	2,457	2,002
U.S. [Member] | Nonqualified [Member] | Defined Benefit Pension Plan [Member]
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Contribution	576	576
Foreign Defined Benefits Pension Plans [Member] | Defined Benefit Pension Plan [Member]
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Contribution	327	377
U.K. [Member] | Defined Contribution Plan [Member]
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Contribution	$ 200	$ 175