Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation and Cash Awards - Stock Options (Details)

v3.21.2
Equity-Based Compensation and Cash Awards - Stock Options (Details) - Stock options - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Stock options    
Outstanding at the beginning of the period (in shares) 432,461  
Options expired (in shares) (76,167)  
Outstanding at the end of the period (in shares) 356,294 432,461
Vested (in shares) 356,294  
Exercisable (in shares) 356,294  
Weighted average exercise price    
Outstanding at the beginning of the period (in dollars per share) $ 50.64  
Options expired (in dollars per share) 50.00  
Outstanding at the end of the period (in dollars per share) 50.78 $ 50.64
Vested (in dollars per share) 50.78  
Exercisable (in dollars per share) $ 50.78  
Weighted average remaining contractual life    
Outstanding 3 years 2 months 12 days 4 years 1 month 6 days
Vested 3 years 2 months 12 days  
Exercisable 3 years 2 months 12 days  
Additional disclosures    
Unamortized equity based compensation expense $ 0