XML 360 R110.htm IDEA: XBRL DOCUMENT v3.22.0.1
Share-Based Compensation - Textual (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-Based Compensation Expense and Cash Flows (Line Items)        
Unrecognized compensation cost related to nonvested awards net of tax Total $ 4.9      
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition 2 years 6 months      
Unrecognized compensation cost period for recognition, weighted-average, years 7 months 6 days      
Employee Benefits and Share-based Compensation $ 1.3      
transition agreement        
Share-Based Compensation Expense and Cash Flows (Line Items)        
Employee Benefits and Share-based Compensation $ 2.5      
2017 Incentive Plan        
Share-Based Compensation Expense and Cash Flows (Line Items)        
Common stock reserved for future issuance       14,000,000
Common Stock        
Share-Based Compensation Expense and Cash Flows (Line Items)        
Number of shares authorized (in shares) 7,000,000      
Deferred Stock Units        
Share-Based Compensation Expense and Cash Flows (Line Items)        
Award vesting period   12 months    
Award settlement period after grant date   3 years    
Restricted Stock Units (RSUs)        
Share-Based Compensation Expense and Cash Flows (Line Items)        
Award vesting period 3 years      
Total fair value of restricted stock units granted $ 3.1 $ 16.6 $ 19.8  
Nonvested shares outstanding (in shares) 1,103,828 1,629,956    
Total fair value of restricted stock units vested $ 3.3 $ 5.6 $ 40.3  
Dividend Equivalent Units        
Share-Based Compensation Expense and Cash Flows (Line Items)        
Nonvested shares outstanding (in shares) 7,000      
Performance Units        
Share-Based Compensation Expense and Cash Flows (Line Items)        
Award vesting period 3 years      
Return on invested capital period 3 years      
Stock price measurement period 3 years      
Payout term, percentage of change 25.00%      
Nonvested shares outstanding (in shares) 650,906 858,588    
Vested performance units 131,203      
Shares Issued, Price Per Share $ 3.89      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value $ 0.5      
Dividend Equivalent Units, Performance Shares        
Share-Based Compensation Expense and Cash Flows (Line Items)        
Nonvested shares outstanding (in shares) 17,000