Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Summary Of Performance Shares Activity (Details)

v3.19.1
Stock-Based Compensation - Summary Of Performance Shares Activity (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Performance stock units    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]    
Outstanding at Beginning of Period (in shares) 348,610  
Target Shares Granted (in shares) 199,413  
Target Shares Vested (in shares) 0  
Target Shares Forfeited (in shares) 0  
Outstanding at End of Period (in shares) 548,023  
Weighted Average Grant Date Fair Value per Share (in dollars per share) $ 24.98  
2017 | Performance stock units    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]    
Outstanding at Beginning of Period (in shares) 169,635  
Target Shares Granted (in shares) 0  
Target Shares Vested (in shares) 0  
Target Shares Forfeited (in shares) 0  
Outstanding at End of Period (in shares) 169,635  
Weighted Average Grant Date Fair Value per Share (in dollars per share) $ 10.73  
2018 | Performance stock units    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]    
Outstanding at Beginning of Period (in shares) 178,975  
Target Shares Granted (in shares) 0  
Target Shares Vested (in shares) 0  
Target Shares Forfeited (in shares) 0  
Outstanding at End of Period (in shares) 178,975  
Weighted Average Grant Date Fair Value per Share (in dollars per share) $ 27.51  
2019 | Performance stock units    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]    
Outstanding at Beginning of Period (in shares) 0  
Target Shares Granted (in shares) 199,413  
Target Shares Vested (in shares) 0  
Target Shares Forfeited (in shares) 0  
Outstanding at End of Period (in shares) 199,413  
Weighted Average Grant Date Fair Value per Share (in dollars per share) $ 34.82  
Incentive Award Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Tax benefit from compensation expense $ 1.8 $ 0.8