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Postretirement Benefit Plans - Schedule of Amounts Recognized in Balance Sheets (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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United States [Member] |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |
Non-current asset | $ 8,700 | $ 7,166
Current liability | (278) | (290)
Non-current liability | (2,145) | (3,165)
Net amount recognized | 6,277 | 3,711
United Kingdom [Member] |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |
Non-current asset | 1,877 | 4,188
Net amount recognized | $ 1,877 | $ 4,188

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