Benefit Plans - Defined Benefit Pension Plan (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Retirement Benefits [Abstract]
Service cost – benefits earned during year	$ 267	$ 330	$ 531	$ 660
Interest cost on projected benefit obligation	766	1,603	1,524	3,206
Expected return on plan assets	(1,603)	(2,599)	(3,188)	(5,198)
Amortization of prior service cost	(8)	(8)	(17)	(17)
Amortization of net (gain) loss	(48)	21	(96)	42
Net periodic pension income	$ (626)	$ (653)	$ (1,246)	$ (1,307)