v3.25.0.1
STOCKHOLDERS' DEFICIT - Awards granted (Details)
$ in Millions
12 Months Ended
Feb. 22, 2024
shares
Aug. 25, 2023
shares
Feb. 23, 2023
USD ($)
shares
Feb. 23, 2021
tranche
shares
Dec. 31, 2024
USD ($)
shares
Dec. 31, 2023
USD ($)
tranche
shares
Dec. 31, 2022
USD ($)
tranche
shares
Dec. 31, 2020
shares
STOCKHOLDERS' EQUITY                
Conversion of share based payment awards into preferred stock         1      
Conversion of convertible securities (in shares)   99,540,642            
Conversion ratio of share based payment awards into common stock         1      
Stock-based compensation expense | $         $ 22.0 $ 42.5 $ 22.5  
Cumulative Adjusted EBITDA Target                
STOCKHOLDERS' EQUITY                
Percentage of performance targets and vesting level         98.00%      
Cumulative Adjusted Free Cash Flow Target                
STOCKHOLDERS' EQUITY                
Percentage of performance targets and vesting level         200.00%      
Board of Director                
STOCKHOLDERS' EQUITY                
Stock-based compensation expense | $         $ 1.0 0.9 0.8  
2024 Performance share award                
STOCKHOLDERS' EQUITY                
Granted (in shares)         774,202      
Stock value | $         $ 4.0      
Percentage of performance target         100.00%      
2023 Performance share award                
STOCKHOLDERS' EQUITY                
Granted (in shares)         105,357      
Stock value | $         $ 0.5      
Percentage of performance target         100.00%      
2022 Performance share award                
STOCKHOLDERS' EQUITY                
Granted (in shares)         44,081      
Stock value | $         $ 0.2      
Percentage of performance target         100.00%      
Restricted stock unit                
STOCKHOLDERS' EQUITY                
Stock-based compensation expense | $         $ 12.3 $ 14.3 $ 13.3  
Performance Vesting | Members of management and executive officers                
STOCKHOLDERS' EQUITY                
Granted (in shares)       537,563   327,758 139,427  
Number of tranches | tranche       3   3 3  
Awards to be granted if target not achieved (in shares)           0    
Performance Vesting | Members of management and executive officers | Minimum                
STOCKHOLDERS' EQUITY                
PSUs vesting as a percentage of performance target             80.00%  
Percentage of performance target           50.00% 50.00%  
Performance Vesting | Members of management and executive officers | Maximum                
STOCKHOLDERS' EQUITY                
PSUs vesting as a percentage of performance target             120.00%  
Percentage of performance target           200.00% 200.00%  
Performance stock unit expense                
STOCKHOLDERS' EQUITY                
Stock-based compensation expense | $         6.5 $ 6.7 $ 8.4  
Special award                
STOCKHOLDERS' EQUITY                
Expected performance target to be achieved (as a percent) 200.00%   200.00%          
Shares vested 478,055              
Stock-based compensation expense | $         $ 2.1 20.2    
Cash settled units                
STOCKHOLDERS' EQUITY                
Shares vested 21,829              
Equity settled units                
STOCKHOLDERS' EQUITY                
Shares vested 456,226              
2013 Equity Incentive Plan                
STOCKHOLDERS' EQUITY                
Conversion of convertible securities (in shares)         1      
2013 Equity Incentive Plan | Restricted stock unit | Members of management                
STOCKHOLDERS' EQUITY                
Grant date fair value (in dollars) | $           $ 12.4 $ 13.6  
2013 Equity Incentive Plan | Performance Vesting | Members of management and executive officers                
STOCKHOLDERS' EQUITY                
Percentage of performance target           100.00%    
Awards to be granted upon achieving 100% of performance target (in shares)           327,758 139,427  
Awards to be granted if target not achieved (in shares)             0  
2024 Equity Incentive Plan | Restricted stock unit | Members of management                
STOCKHOLDERS' EQUITY                
Grant date fair value (in dollars) | $         $ 12.0      
Members of management and executive officers | Performance Vesting                
STOCKHOLDERS' EQUITY                
Granted (in shares)         2,322,759     287,260
Awards to be granted upon achieving 100% of performance target (in shares)         2,322,759      
Awards to be granted if target not achieved (in shares)         0      
Period of cumulative adjusted EBITDA, diluted earnings per share, and net profit results to meet the performance target condition               3 years
Members of management and executive officers | Performance Vesting | Minimum                
STOCKHOLDERS' EQUITY                
PSUs vesting as a percentage of performance target         80.00% 80.00%    
Percentage of performance target         50.00%      
Members of management and executive officers | Performance Vesting | Maximum                
STOCKHOLDERS' EQUITY                
PSUs vesting as a percentage of performance target         120.00% 120.00%    
Percentage of performance target         200.00%      
Members of management and executive officers | 2024 Equity Incentive Plan | Performance Vesting                
STOCKHOLDERS' EQUITY                
Percentage of performance target         100.00%      
Members of management | 2013 and 2024 Equity Incentive Plans | Restricted stock unit                
STOCKHOLDERS' EQUITY                
Vesting period (in years)         3 years      
Vesting rights percentage         33.00% 33.00% 33.00%  
Members of management | 2013 Equity Incentive Plan | Restricted stock unit                
STOCKHOLDERS' EQUITY                
Granted (in shares)           354,015 139,427  
Number of days from the termination of service for settlement of fully vested units         30 days      
Members of management | 2024 Equity Incentive Plan | Restricted stock unit                
STOCKHOLDERS' EQUITY                
Granted (in shares)         2,322,759      
Common Stock | Board of Director                
STOCKHOLDERS' EQUITY                
Shares issued         202,392 8,560 4,165  
Class A common stock | Special award                
STOCKHOLDERS' EQUITY                
Shares vested     238,959          
Stock-based compensation expense | $     $ 14.9          
AMC Preferred Equity Units | RSU and PSU Units                
STOCKHOLDERS' EQUITY                
Nonvested shares         63,748      
AMC Preferred Equity Units | RSU and PSU Units | 2024 Tranche Year                
STOCKHOLDERS' EQUITY                
Nonvested shares         49,171      
AMC Preferred Equity Units | RSU and PSU Units | 2025 Tranche Year                
STOCKHOLDERS' EQUITY                
Nongranted shares         14,577      
AMC Preferred Equity Units | Special award                
STOCKHOLDERS' EQUITY                
Shares vested     238,959          
Stock-based compensation expense | $     $ 5.3          
AMC Preferred Equity Units | Board of Director                
STOCKHOLDERS' EQUITY                
Shares issued           15,376 4,165