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Retirement Plans - Schedule of Changes in Benefit Obligations and Plan Assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Service cost $ 0 $ 0 $ 0
Interest cost 25 35 23
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Funded Status at End of Year 561 708  
Unrecognized transition obligation (310) (386)  
Unrecognized net gain 750 728  
Amounts recognized in retained earnings 1,001 1,050  
Change in Benefit Obligation [Member]      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 708 986  
Service cost 0 0  
Interest cost 35 22  
Amendments 0 0  
Actuarial gain (119) (212)  
Net benefits paid (63) (88)  
Benefit obligation at end of year 561 708 986
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Net benefits paid (63) (88)  
Change In Plan Assets [Member]      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Net benefits paid (63) (88)  
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 63 88  
Net benefits paid (63) (88)  
Fair value of plan assets at end of year $ 0 $ 0 $ 0