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, 2021	Dec. 31, 2020
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 1,159	$ 1,205
Sale proceeds (benefit payments)	(131)	(119)
Change in unrealized gain	(15)	41
Foreign exchange impact	(10)	32
Ending balance	$ 1,003	$ 1,159