Pension and Employee Benefit Plans - Components of Pension and Employee Benefit Expenses (Detail) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 220	$ 194	$ 439	$ 388
Expected return on plan assets	(390)	(378)	(780)	(756)
Amortization of net actuarial loss	65	103	131	206
Net periodic benefit (gain) cost	$ (105)	$ (81)	$ (210)	$ (162)