Stock-based Compensation Plans - Summary of Change in Post Retirement Benefit Obligation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Changes in Benefit Obligations in Other Comprehensive Income (Loss):
Net (gain) loss	$ (62)	$ (39)	$ 532
Amortization of prior service cost	(369)	(369)	(369)
Other Post Retirement Benefits
Change in Benefit Obligation:
Benefit obligation at beginning of year	1,953	1,957
Service cost	77	80
Interest cost	38	50
Actuarial (gain) loss	(62)	(39)
Benefits paid	(88)	(95)
Benefit obligation at end of year	1,918	1,953	$ 1,957
Amounts recognized in the consolidated balance sheet:
Long-term liabilities	1,918	1,953
Components of Net Periodic Post Retirement Benefit Cost:
Service cost	77	80
Interest cost	38	50
Amortization of prior service cost	369	369
Net periodic post retirement costs (recognized in general and administrative expense)	484	499
Other Changes in Benefit Obligations in Other Comprehensive Income (Loss):
Net (gain) loss	(62)	(39)
Prior service cost	0	0
Amortization of prior service cost	(369)	(369)
Total recognized in other comprehensive (loss) income	(431)	(408)
Total recognized in net periodic benefit cost and other comprehensive income	$ 53	$ 91