Pension and Employee Benefit Plans - Schedule of Changes in Projected Benefit Obligations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Change in projected benefit obligation:
Interest cost	$ 775	$ 1,034	$ 1,303
Change in plan assets:
Fair value of plan assets at beginning of year	28,545
Fair value of plan assets at end of year	29,474	28,545
Funded status at end of year	$ 5,600	$ 9,700	$ 8,800
Weighted-average assumptions used to determine benefit obligations for the year ended December 31:
Discount rate	2.10%	2.95%	4.05%
Pension Benefits [Member]
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$ 38,272	$ 35,985	$ 32,998
Interest cost	775	1,034	1,303
Actuarial (gain) loss	(1,936)	3,323	(3,704)
Benefits paid	(2,076)	(2,070)	(2,020)
Projected benefit obligation at end of year	35,035	38,272	35,985
Change in plan assets:
Fair value of plan assets at beginning of year	28,545	27,099	24,197
Actual return on plan assets	3,005	1,629	(4,431)
Employer contribution		1,887	491
Benefits paid	(2,076)	(2,070)	(2,020)
Fair value of plan assets at end of year	29,474	28,545	27,099
Funded status at end of year	$ (5,561)	$ (9,727)	$ (8,886)
Weighted-average assumptions used to determine benefit obligations for the year ended December 31:
Discount rate	2.55%	2.10%	2.95%