Defined Benefit Plans - Net Periodic Cost (Benefit) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Retirement Benefits [Abstract]
Expected return on plan assets, net of expenses	$ (2,487)	$ (2,341)	$ (4,975)	$ (4,683)
Interest cost on projected benefit obligation	1,470	1,655	2,940	3,310
Net amortization and deferral	208	309	417	619
Net periodic expense (benefit)	$ (809)	$ (377)	$ (1,618)	$ (754)