Retirement Plans - Schedule of Changes in Benefit Obligations and Plan Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Service cost	$ 0	$ 0	$ 0
Interest cost	23	23	34
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Funded Status at End of Year	986	1,372
Unrecognized transition obligation	(461)	(537)
Unrecognized net gain	584	308
Amounts recognized in retained earnings	1,109	1,143
Change in Benefit Obligation [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	1,372	834
Service cost	0	0
Interest cost	23	23
Amendments	0	537
Actuarial gain	(302)	102
Net benefits paid	(107)	(124)
Benefit obligation at end of year	986	1,372	834
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net benefits paid	(107)	(124)
Change In Plan Assets [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Net benefits paid	(107)	(124)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	107	124
Net benefits paid	(107)	(124)
Fair value of plan assets at end of year	$ 0	$ 0	$ 0