Defined Benefit Plans - Net Periodic Cost (Benefit) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Retirement Benefits [Abstract]
Expected return on plan assets, net of expenses	$ (2,740)	$ (3,492)	$ (8,220)	$ (6,983)
Interest cost on projected benefit obligation	1,746	1,004	5,238	2,008
Net amortization and deferral	869	741	2,609	1,482
Net periodic expense (benefit)	$ (125)	$ (1,747)	$ (373)	$ (3,493)