STOCKHOLDERS' DEFICIT - Stock-based compensation (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Stock Based Compensation Expense | ||
| Stock-based compensation expense | $ 7.3 | $ 5.7 |
| Total estimated unrecognized compensation cost related to nonvested stock-based compensation arrangements | $ 8.6 | |
| Weighted average period recognized | 1 year | |
| Board of director stock award expense | ||
| Stock Based Compensation Expense | ||
| Stock-based compensation expense | $ 1.1 | 1.3 |
| Special awards expense | ||
| Stock Based Compensation Expense | ||
| Stock-based compensation expense | 4.6 | 1.0 |
| Restricted stock unit expense | ||
| Stock Based Compensation Expense | ||
| Stock-based compensation expense | 1.4 | 2.6 |
| Performance stock unit expense | ||
| Stock Based Compensation Expense | ||
| Stock-based compensation expense | $ 0.2 | $ 0.8 |