Pension and Employee Benefit Plans - Components of Pension and Employee Benefit Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit (gain) cost	$ (105)	$ (81)	$ (315)	$ (243)
Health Care Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	219	194	658	582
Expected return on plan assets	(390)	(378)	(1,170)	(1,133)
Amortization of net actuarial loss	$ 66	$ 103	$ 197	$ 308