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Long-Term Debt - Summary of Long-Term Debt (Parenthetical) (Detail) | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024 | Oct. 08, 2024 | Feb. 02, 2021
8.625% Senior Secured Notes Due on February 1, 2026 |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt Instrument, interest rate, stated percentage | 8.625% | 8.625% |  | 8.625%
Debt instrument, maturity date | Feb. 01, 2026 | Feb. 01, 2026 |  |
11.000% Senior Secured First Lien notes due on August 1, 2028 |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt Instrument, interest rate, stated percentage | 11.00% | 11.00% | 11.00% |
Debt instrument, maturity date | Aug. 01, 2028 | Aug. 01, 2028 |  |
9.200% Senior Secured Second Lien Notes due on August 1, 2028 |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt Instrument, interest rate, stated percentage | 9.20% | 9.20% | 9.20% |
Debt instrument, maturity date | Aug. 01, 2028 | Aug. 01, 2028 |  |

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