XML 73 R60.htm IDEA: XBRL DOCUMENT v3.21.1
Share-Based Compensation (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares available for future grant (in shares) 1,405,020    
Costs for share-based payment arrangements $ 2,400,000 $ 4,500,000  
Unamortized share-based compensation expense $ 14,100,000    
Weighted average period over which unrecognized compensation cost is expected to be recognized 2 years 4 months 24 days    
Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Units granted (in shares) 180,000 75,000  
Weighted-average fair values per share (in dollars per share) $ 19.30 $ 13.93  
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total stock options granted (in shares) 100,000 75,000  
Weighted average grant date fair value (in dollars per share) $ 13.67 $ 3.94  
Weighted-average exercise prices (in dollars per share) $ 19.24 $ 25.70  
Expected life 6 years 6 months    
Expected volatility (as a percent) 73.74%    
Risk-free rate 1.44%    
Expected quarterly dividends $ 0    
Restricted Stock Units, Guaranteed Minimum Payouts      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Liabilities recognized for restricted stock grants 2,500,000   $ 2,400,000
Cash used to settle liabilities $ 300,000 $ 300,000