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Pension and Employee Benefit Plans - Schedule of Changes in Projected Benefit Obligations (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Change in projected benefit obligation:      
Interest cost $ 1,274 $ 877 $ 775
Change in plan assets:      
Fair value of plan assets at beginning of year 21,821    
Fair value of plan assets at end of year 22,646 21,821  
Funded status at end of year $ 4,100 $ 5,500 $ 5,600
Discount rate 4.90% 2.55% 2.10%
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Interest Expense Interest Expense Interest Expense
Pension Benefits [Member]      
Change in projected benefit obligation:      
Projected benefit obligation at beginning of year $ 27,350 $ 35,035 $ 38,272
Interest cost 1,274 877 775
Actuarial (gain) loss 183 (6,540) (1,936)
Benefits paid (2,047) (2,022) (2,076)
Projected benefit obligation at end of year 26,760 27,350 35,035
Change in plan assets:      
Fair value of plan assets at beginning of year 21,821 29,474 28,545
Actual return on plan assets 2,872 (5,631) 3,005
Benefits paid (2,047) (2,022) (2,076)
Fair value of plan assets at end of year 22,646 21,821 29,474
Funded status at end of year $ (4,114) $ (5,529) $ (5,561)
Discount rate 4.70% 4.90% 2.55%