XML 62 R52.htm IDEA: XBRL DOCUMENT v3.22.2
Stock-Based Compensation - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 6 Months Ended
Feb. 28, 2022
Feb. 28, 2021
Jun. 30, 2022
Jun. 30, 2021
Stock-based compensation        
Shares tendered by employees to pay employee withholding taxes (in shares)     128,432  
Nonvested shares, share units or DEU        
Stock-based compensation        
Total fair value of shares vested     $ 17.2 $ 18.4
Nonvested shares, share units        
Stock-based compensation        
Unrecognized compensation expense     $ 25.5  
Expected weighted average period for recognition of expense     2 years 2 months 12 days  
Certain members of senior management | Performance shares        
Stock-based compensation        
Incremental compensation expense   $ 4.0    
Unrecognized compensation expense     $ 0.9  
Expected weighted average period for recognition of expense     8 months 12 days  
Time-Based Share Awards | Certain members of senior management | Nonvested shares | 2013 Plan        
Stock-based compensation        
Performance period 3 years      
Time-Based Share Awards | Certain members of senior management | Nonvested shares | 2013 Plan | First Vesting Period        
Stock-based compensation        
Vesting (as a percent) 33.33%      
Time-Based Share Awards | Certain members of senior management | Nonvested shares | 2013 Plan | Second Vesting Period        
Stock-based compensation        
Vesting (as a percent) 33.33%      
Time-Based Share Awards | Certain members of senior management | Nonvested shares | 2013 Plan | Third Vesting Period        
Stock-based compensation        
Vesting (as a percent) 33.33%      
Time-Based Share Awards | Employee | Share Units | Incentive program bonus award fiscal year performance        
Stock-based compensation        
Award vesting period 3 years      
Time-Based Share Awards | Employee | Share Units | Incentive program bonus award fiscal year performance | First Vesting Period        
Stock-based compensation        
Vesting (as a percent) 33.33%      
Time-Based Share Awards | Employee | Share Units | Incentive program bonus award fiscal year performance | Second Vesting Period        
Stock-based compensation        
Vesting (as a percent) 33.33%      
Time-Based Share Awards | Employee | Share Units | Incentive program bonus award fiscal year performance | Third Vesting Period        
Stock-based compensation        
Vesting (as a percent) 33.33%      
Vesting Based On Performance | Certain members of senior management | Nonvested shares | 2013 Plan        
Stock-based compensation        
Performance period 3 years      
Vesting Based On Performance | Certain members of senior management | Nonvested shares | 2013 Plan | Maximum        
Stock-based compensation        
Vesting percent     200.00%