Defined Benefit Plans - Net Periodic Cost (Benefit) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Retirement Benefits [Abstract]
Expected return on plan assets, net of expenses	$ (3,492)	$ (3,210)	$ (6,983)	$ (6,420)
Interest cost on projected benefit obligation	1,004	836	2,008	1,671
Net amortization and deferral	741	1,529	1,482	3,058
Net periodic expense (benefit)	$ (1,747)	$ (845)	$ (3,493)	$ (1,691)