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Retirement Plans and Other Postretirement Benefits - Fair Value of Plan Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets $ 774,329 $ 728,641
U.S. Defined Benefit Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 599,886 569,049
U.S. Defined Benefit Pension Plans | Municipal bonds    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 1,253 711
U.S. Defined Benefit Pension Plans | Corporate debt instruments    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 5,295 6,192
U.S. Defined Benefit Pension Plans | Corporate debt instruments – Preferred    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 16,004 13,425
U.S. Defined Benefit Pension Plans | Corporate stocks – Common    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 43,287 53,629
U.S. Defined Benefit Pension Plans | Registered investment companies    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 169,794 155,541
U.S. Defined Benefit Pension Plans | U.S. Government securities    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 1,262 1,253
U.S. Defined Benefit Pension Plans | Total investments    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 236,895 230,751
U.S. Defined Benefit Pension Plans | Investments measured at net asset value    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 362,991 338,298
Level 1 | U.S. Defined Benefit Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 213,081 209,170
Level 1 | U.S. Defined Benefit Pension Plans | Municipal bonds    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0 0
Level 1 | U.S. Defined Benefit Pension Plans | Corporate debt instruments    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0 0
Level 1 | U.S. Defined Benefit Pension Plans | Corporate debt instruments – Preferred    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0 0
Level 1 | U.S. Defined Benefit Pension Plans | Corporate stocks – Common    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 43,287 53,629
Level 1 | U.S. Defined Benefit Pension Plans | Registered investment companies    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 169,794 155,541
Level 1 | U.S. Defined Benefit Pension Plans | U.S. Government securities    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0 0
Level 1 | U.S. Defined Benefit Pension Plans | Total investments    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 213,081 209,170
Level 1 | U.S. Defined Benefit Pension Plans | Investments measured at net asset value    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0 0
Level 2 | U.S. Defined Benefit Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 23,814 21,581
Level 2 | U.S. Defined Benefit Pension Plans | Municipal bonds    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 1,253 711
Level 2 | U.S. Defined Benefit Pension Plans | Corporate debt instruments    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 5,295 6,192
Level 2 | U.S. Defined Benefit Pension Plans | Corporate debt instruments – Preferred    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 16,004 13,425
Level 2 | U.S. Defined Benefit Pension Plans | Corporate stocks – Common    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0 0
Level 2 | U.S. Defined Benefit Pension Plans | Registered investment companies    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0 0
Level 2 | U.S. Defined Benefit Pension Plans | U.S. Government securities    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 1,262 1,253
Level 2 | U.S. Defined Benefit Pension Plans | Total investments    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 23,814 21,581
Level 2 | U.S. Defined Benefit Pension Plans | Investments measured at net asset value    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets $ 0 $ 0