Pension Plans - Projected Benefit Obligation and Fair Value of Plan Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Projected benefit obligation at beginning of the year	$ 42,582	$ 37,936
Interest cost	1,138	1,301	$ 1,411
Actuarial (gain) loss	(958)	4,590
Benefits paid	(1,352)	(1,245)
Projected benefit obligation at end of year	41,410	42,582	37,936
Fair value of plan assets at beginning of the year	36,756	32,658
Actual return on plan assets	2,353	5,013
Employer contributions	0	330
Benefits paid	(1,352)	(1,245)
Fair value of plan assets at end of the year	37,757	36,756	$ 32,658
Unfunded pension obligation	$ 3,653	$ 5,826