Post-employment Benefits - Additional Information (Detail) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Disclosure Of Defined Benefit Plans [Line Items] | ||
| Expected contributions paid by employer under post-employment benefit plans | $ 699 | $ 703 |
| Post-employment benefit plans [Member] | ||
| Disclosure Of Defined Benefit Plans [Line Items] | ||
| Conversion rate for retirees under post-employment benefit plans | 6.20% | 6.50% |
| Expected contributions paid by employer under post-employment benefit plans | $ 700 | |