v3.26.1
STOCKHOLDERS' DEFICIT - RSU, PSU activity (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Weighted Average Grant Date Fair Value    
Taxes paid for restricted unit withholdings $ 3.7 $ 4.4
RSU and PSU    
Weighted Average Grant Date Fair Value    
Taxes paid for restricted unit withholdings $ 3.7  
Special Performance Stock | Cumulative Adjusted EBITDA Target    
Weighted Average Grant Date Fair Value    
Percentage of performance target 100.00%  
Special Performance Stock | Cumulative Adjusted Free Cash Flow Target    
Weighted Average Grant Date Fair Value    
Percentage of performance target 100.00%  
Restricted stock unit    
Shares of RSU and PSU    
Balance at the beginning of the period (in shares) 4,573,078  
Vested (in shares) (942,900)  
Cancelled (in shares) (882,087)  
Nonvested at the end of the period (in shares) 2,748,091  
Weighted Average Grant Date Fair Value    
Balance at the beginning of the period (in dollars per share) $ 4.73  
Vested (in dollars per share) 5.82  
Cancelled (in dollars per share) 5.95  
Nonvested at the end of the period (in dollars per share) $ 3.96  
Total nonvested at March 31, 2026 2,748,091  
Performance Vesting    
Shares of RSU and PSU    
Balance at the beginning of the period (in shares) 324,969  
Granted (in shares) 1,783,588  
Vested (in shares) (119,307)  
Cancelled (in shares) (97,339)  
Nonvested at the end of the period (in shares) 1,891,911  
Weighted Average Grant Date Fair Value    
Balance at the beginning of the period (in dollars per share) $ 3.57  
Granted (in dollars per share) 1.22  
Vested (in dollars per share) 3.57  
Cancelled (in dollars per share) 3.57  
Nonvested at the end of the period (in dollars per share) $ 1.35  
Tranche Year 2027 awarded under the 2025 PSU award with grant date fair values to be determined in year 2027 1,217,082  
Total nonvested at March 31, 2026 3,108,993  
Performance Vesting | Special Award    
Shares of RSU and PSU    
Granted (in shares) 3,778,642  
Vested (in shares) (2,005,981)  
Cancelled (in shares) (1,772,661)  
Weighted Average Grant Date Fair Value    
Granted (in dollars per share) $ 1.22  
Vested (in dollars per share) 1.22  
Cancelled (in dollars per share) $ 1.22