Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Performance-Based Restricted Stock Awards (Details)

v3.20.1
Stock-Based Compensation - Performance-Based Restricted Stock Awards (Details) - $ / shares
12 Months Ended
Feb. 05, 2020
Dec. 31, 2017
2017 Performance Stock Award Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period   3 years
Equity instruments other options, grants in period (in shares) 28,481  
Equity instruments other than options, grants in period, weighted average grant date fair value (in dollars per share) $ 12.30  
2017 Performance Stock Award Plan | Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Percentage of target award   0.00%
2017 Performance Stock Award Plan | Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Percentage of target award   150.00%
2016 Performance Stock Awards Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period 3 years  
Equity instruments other options, grants in period (in shares) 36,647  
2016 Performance Stock Awards Plan | Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Percentage of target award 0.00%  
2016 Performance Stock Awards Plan | Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Percentage of target award 150.00%  
Stock Awards | 2015 Stock Awards Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Equity instruments other options, grants in period (in shares) 45,418  
Equity instruments other than options, grants in period, weighted average grant date fair value (in dollars per share) $ 12.995