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Retirement Plans and Other Postretirement Benefits - Fair Value of Plan Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | $ 967,915 | $ 913,034
U.S. Defined Benefit Pension Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 701,627 | 662,298
U.S. Defined Benefit Pension Plans | Municipal bonds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 676 | 876
U.S. Defined Benefit Pension Plans | Corporate debt instruments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 4,053 | 3,442
U.S. Defined Benefit Pension Plans | Corporate debt instruments – Preferred |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 11,265 | 12,196
U.S. Defined Benefit Pension Plans | Corporate stocks – Common |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 67,975 | 62,897
U.S. Defined Benefit Pension Plans | U.S. Government securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 663 | 526
U.S. Defined Benefit Pension Plans | Total investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 235,167 | 316,467
U.S. Defined Benefit Pension Plans | Investments measured at net asset value |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 466,460 | 345,831
U.S. Defined Benefit Pension Plans | Registered investment companies |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 150,535 | 236,530
Level 1 | U.S. Defined Benefit Pension Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 218,510 | 299,427
Level 1 | U.S. Defined Benefit Pension Plans | Corporate stocks – Common |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 67,975 | 62,897
Level 1 | U.S. Defined Benefit Pension Plans | U.S. Government securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 |
Level 1 | U.S. Defined Benefit Pension Plans | Total investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 218,510 | 299,427
Level 1 | U.S. Defined Benefit Pension Plans | Registered investment companies |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 150,535 | 236,530
Level 2 | U.S. Defined Benefit Pension Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 16,657 | 17,040
Level 2 | U.S. Defined Benefit Pension Plans | Municipal bonds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 676 | 876
Level 2 | U.S. Defined Benefit Pension Plans | Corporate debt instruments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 4,053 | 3,442
Level 2 | U.S. Defined Benefit Pension Plans | Corporate debt instruments – Preferred |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 11,265 | 12,196
Level 2 | U.S. Defined Benefit Pension Plans | U.S. Government securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 663 | 526
Level 2 | U.S. Defined Benefit Pension Plans | Total investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 16,657 | $ 17,040
Level 2 | U.S. Defined Benefit Pension Plans | Registered investment companies |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | $ 0 |

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