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Employee Benefits - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]      
Shares held by the rabbi trust 69,672 69,982  
Cash incentive awards $ 38.8 $ 32.6 $ 36.4
Shares purchased by custodians 1,420 2,158 2,516
Maximum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Payroll deduction for ESPP, percent of annual wages 10.00%    
Highly Compensated Employees [Member] | Maximum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Payroll deduction for ESPP, percent of annual wages 20.00%    
401(k)Saving Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Company match of contribution 50.00%    
Employees contribution share 6.00%    
Contribution in operation $ 15.2 $ 14.0 $ 12.4