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Retirement Plans - Reconciliation of Balances of Pension Benefit Obligation and Fair Value of Plan Assets (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Change in pension benefit obligation:      
Benefit obligation at beginning of year $ 279,400,000 $ 290,600,000  
Service cost 500,000 500,000 $ 800,000
Interest cost $ 6,800,000 $ 6,400,000 $ 8,000,000.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Labor and Related Expense Labor and Related Expense Labor and Related Expense
Net actuarial gain $ (58,700,000) $ (2,800,000)  
Benefits paid (16,100,000) (15,300,000)  
Benefit obligation at end of year 211,900,000 279,400,000 $ 290,600,000
Change in plan assets:      
Fair value of plan assets at beginning of year 282,300,000 262,800,000  
Actual (loss) return on plan assets (53,700,000) 34,800,000  
Contributions by the company 0 0 0
Benefits paid (16,100,000) (15,300,000)  
Fair value of plan assets at end of year 212,500,000 282,300,000 $ 262,800,000
Funded status of the plan (underfunded) 600,000 2,900,000  
Amounts recognized in the consolidated balance sheet consist of:      
Noncurrent assets - accrued benefit liability 600,000 2,900,000  
Accumulated other comprehensive income 54,200,000 42,500,000  
Net amount included in retained earnings $ 54,800,000 $ 45,400,000