v3.22.4
Employee Benefit Plans (Disaggregated Information Related to Corporations Defined Benefit Pension Plans) (Detail) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]        
Projected benefit obligation $ 143,944 $ 185,925 $ 197,593 $ 186,641
Accumulated benefit obligation 143,944 185,925 197,593  
Fair value of plan assets 161,823 197,747 182,088 $ 174,173
Funded status of the plan at end of year and accrued benefit (liability) recognized 17,879 11,822 $ (15,505)  
Retirement Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Projected benefit obligation 131,648 170,389    
Accumulated benefit obligation 131,648 170,389    
Fair value of plan assets 161,823 197,747    
Funded status of the plan at end of year and accrued benefit (liability) recognized 30,175 27,358    
Restoration Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Projected benefit obligation 12,296 15,536    
Accumulated benefit obligation 12,296 15,536    
Fair value of plan assets 0 0    
Funded status of the plan at end of year and accrued benefit (liability) recognized $ (12,296) $ (15,536)