Pension and Employee Benefit Plans - Components of Pension and Employee Benefit Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	$ 53	$ 107	$ 166	$ 322
Health Care Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	304	318	912	955
Expected return on plan assets	(308)	(285)	(915)	(856)
Amortization of net actuarial loss	$ 57	$ 74	$ 169	$ 223