Defined Benefit Plans - Net Periodic Cost (Benefit) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Retirement Benefits [Abstract]
Expected return on plan assets, net of expenses	$ (3,491)	$ (3,210)
Interest cost on projected benefit obligation	1,004	835
Net amortization and deferral	741	1,529
Net periodic expense (benefit)	$ (1,746)	$ (846)