Defined Benefit Plans - Net Periodic Cost (Benefit) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Retirement Benefits [Abstract]
Expected return on plan assets, net of expenses	$ (2,488)	$ (2,341)	$ (7,463)	$ (7,024)
Interest cost on projected benefit obligation	1,471	1,654	4,411	4,964
Net amortization and deferral	207	310	625	929
Net periodic expense (benefit)	$ (810)	$ (377)	$ (2,427)	$ (1,131)