Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation and Cash Awards (Details)

v3.21.2
Equity-Based Compensation and Cash Awards (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 12, 2019
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Jun. 30, 2021
Jun. 17, 2020
Mar. 11, 2019
Stock-based compensation expense                
Equity based compensation expense recognized   $ 5,298 $ 5,699 $ 15,189 $ 17,001      
2020 Plan                
Stock-based compensation expense                
Number of stock-based compensation awards authorized             10,050,000  
Number of shares available for future grant under the Plan           7,888,490    
AMP Plan                
Stock-based compensation expense                
Number of stock-based compensation awards authorized               10,000,000
AMC Plan | Common Stock                
Stock-based compensation expense                
Conversion rate 1              
AMC Plan RSUs                
Stock-based compensation expense                
Conversion rate 1.8926              
RSUs                
Stock-based compensation expense                
Equity based compensation expense recognized   3,327 3,063 9,957 9,021      
PSUs                
Stock-based compensation expense                
Equity based compensation expense recognized   1,452 1,827 3,211 5,380      
Converted AM RSU Awards                
Stock-based compensation expense                
Equity based compensation expense recognized   186 459 988 1,881      
Equity awards issued to directors                
Stock-based compensation expense                
Equity based compensation expense recognized   $ 333 $ 350 $ 1,033 $ 719