Pension and Employee Benefit Plans - Components of Pension and Employee Benefit Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	$ 57	$ 107	$ 113	$ 214
Health Care Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	304	318	608	637
Expected return on plan assets	(304)	(285)	(608)	(571)
Amortization of net actuarial loss	$ 57	$ 74	$ 113	$ 148