Fair Value Measurements - Changes in fair value of derivative liability (Details) - BW Ultimate Parent, LLC and Subsidiaries - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
|
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Transfers between levels | $ 0 | |
| Derivative liabilities | ||
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Balance at beginning of the period | 0 | $ 900 |
| Change in fair value | 0 | (900) |
| Balance at end of the period | $ 0 | $ 0 |