Business Segments - Additional Information (Detail) |
6 Months Ended |
|---|---|
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Jun. 30, 2026
Company
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| Segment Reporting Information [Line Items] | |
| Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] | srt:ChiefExecutiveOfficerMember |
| Segment reporting, expense information used by CODM, description | the CODM uses segment income (loss) from operations when assessing segment performance and when making decisions to allocate financial resources between segments, primarily through periodic budgeting and segment performance reviews. |
| Chinese Joint Venture Company [Member] | |
| Segment Reporting Information [Line Items] | |
| Equity interest in number of joint venture | 2 |