Annual report pursuant to Section 13 and 15(d)

Equity Compensation Plans - Summary of Restricted and Performance Stock Units (Details)

v3.20.4
Equity Compensation Plans - Summary of Restricted and Performance Stock Units (Details) - Restricted and performance stock units - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Restricted and Performance Stock Units      
Outstanding at the beginning of the period (in shares) 1,113,697 1,106,363  
Granted (in shares) 1,008,869 217,146  
Released (in shares) (247,333) (86,405)  
Forfeited (in shares) (92,328) (123,407)  
Outstanding at the end of the period (in shares) 1,782,905 1,113,697 1,106,363
Weighted Average Exercise Price      
Outstanding at the beginning of the period (in USD per share) $ 21.62 $ 22.18  
Granted (in USD per share) 9.57 17.60 $ 23.34
Released (in USD per share) 19.66 16.77  
Forfeited (in USD per share) 18.64 22.97  
Outstanding at the end of the period (in USD per share) $ 15.23 $ 21.62 $ 22.18
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Weighted Average Remaining Vesting Life, outstanding (in years) 1 year 9 months 29 days 2 years 3 months 3 days 2 years 10 months 24 days
Aggregate intrinsic value, outstanding $ 31,825 $ 19,800 $ 22,603