Defined Benefit Plans - Net Periodic Cost (Benefit) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Retirement Benefits [Abstract]
Expected return on plan assets, net of expenses	$ (2,411)	$ (2,740)	$ (7,234)	$ (8,220)
Interest cost on projected benefit obligation	1,662	1,746	4,985	5,238
Net amortization and deferral	418	869	1,255	2,609
Net periodic expense (benefit)	$ (331)	$ (125)	$ (994)	$ (373)