Pension and Employee Benefit Plans - Components of Pension and Employee Benefit Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 219	$ 194
Expected return on plan assets	(390)	(378)
Amortization of net actuarial loss	66	103
Net periodic benefit (gain) cost	(105)	(81)
Health Care Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	0	1
Amortization of net actuarial (gain) loss	(2)	2
Net periodic benefit (gain) cost	$ (2)	$ 3