XML 78 R67.htm IDEA: XBRL DOCUMENT v3.21.1
Stock-Based Compensation - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Stock-Based Compensation    
Share-based compensation, remaining shares available for issuance (in shares) 4,179,857  
Stock-based compensation expense (in dollars) $ 2.5 $ 3.4
Director    
Stock-Based Compensation    
Number of share options granted during the period (in shares) 56,672 77,608
Stock Options    
Stock-Based Compensation    
Number of share options granted during the period (in shares) 0 250,432
Restricted Stock Units    
Stock-Based Compensation    
Vesting period (in years) 3 years  
Number of shares of other than options granted during the period (in shares) 316,974 277,449
Performance Shares    
Stock-Based Compensation    
Vesting period (in years) 3 years  
Number of shares of other than options granted during the period (in shares) 203,697 321,599
Options Granted in 2020 | Stock Options    
Stock-Based Compensation    
Vesting period (in years) 3 years  
Expiration period (in years) 10 years  
Options Granted in 2019 | Stock Options    
Stock-Based Compensation    
Vesting period (in years)   3 years
Expiration period (in years)   10 years
2013 Omnibus Plan    
Stock-Based Compensation    
Share-based compensation, shares authorized (in shares) 7,477,395  
Performance Shares 2020 | Performance Shares    
Stock-Based Compensation    
Percentage of shares paid based on total shareholder return relative to defined peer group (as a percent) 60.00%  
Percentage of shares paid based on adjusted EBITDA (as a percent) 40.00%  
Performance period (in years) 3 years  
Increase decrease in percentage of shares paid based on total shareholder return relative to defined peer group 20.00% 20.00%
Performance Shares 2019 | Performance Shares    
Stock-Based Compensation    
Percentage of shares paid based on total shareholder return relative to defined peer group (as a percent) 200.00% 200.00%
Percentage of shares paid based on adjusted EBITDA (as a percent)   100.00%
Performance period (in years) 3 years 3 years