Postretirement Benefit Plans - Fair Value Changes Within Asset Categories for which Fair Value Measurements Use Significant Unobservable Inputs Level 3 (Detail) - Insurance Contracts [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 1,003	$ 1,159
Sale proceeds (benefit payments)	(104)	(131)
Change in unrealized gain	(120)	(15)
Foreign exchange impact	(102)	(10)
Ending balance	$ 677	$ 1,003