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Commitments and contingencies - Additional Information (Detail) $ in Thousands | Mar. 06, 2024 business_unit | Dec. 31, 2023 USD ($) lawsuit claim | Dec. 31, 2022 USD ($)
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Commitments Disclosure [Line Items] |  |  |
Estimated insurance recoveries | $ |  | $ 66,000 | $ 0
Mountain View Fire |  |  |
Commitments Disclosure [Line Items] |  |  |
Number of active lawsuits |  | 21 |
Number of non-litigation claims | claim |  | 1 |
Number of lawsuits filed by groups of individual plaintiffs |  | 14 |
Number of wrongful death lawsuits |  | 1 |
Number of lawsuits filed by insurance companies |  | 6 |
Accrued estimated losses | $ |  | $ 66,000 |
Estimated insurance recoveries | $ |  | $ 66,000 |
Mountain View Fire | Subsequent Event |  |  |
Commitments Disclosure [Line Items] |  |  |
Number of bellwether cases | business_unit | 4 |  |

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