Annual report pursuant to Section 13 and 15(d)

Stock - Based Compensation - Performance-based Stock Awards (Details)

v3.20.4
Stock - Based Compensation - Performance-based Stock Awards (Details) - Performance Shares - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]    
Outstanding, beginning of the year (in shares) 77,986  
Granted (in shares) 36,647  
Vested (in shares) (64,711)  
Forfeited/Canceled (in shares) (20,558)  
Outstanding, end of the year (in shares) 29,364 77,986
Number of shares authorized (in shares) 5,074  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]    
Outstanding, beginning balance (in dollars per share) $ 13.66  
Options granted, weighted average fair value (in dollars per share) 13.00 $ 15.72
Options expected to vest, vested, grant date fair value (dollars per share) 13.21  
Forfeited, weighted average grant date fair value (in dollars per share) 13.73  
Outstanding, ending balance (in dollars per share) $ 13.76 $ 13.66
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]    
Outstanding, end of the year (in shares) 44,046