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Share-Based Compensation - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
May 24, 2016
May 22, 2007
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
May 15, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock authorized to be issued under plan (in shares) 6,400,000          
Total intrinsic value of options exercised during period     $ 8,100 $ 5,400 $ 4,500  
Cash received from options exercised during period     12,625 $ 4,987 $ 2,259  
Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized pre-tax compensation cost     $ 19,400      
Weighted average recognition period (in years)     3 years 6 months 29 days      
Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized pre-tax compensation cost     $ 4,600      
Weighted average recognition period (in years)     2 years 7 months 20 days      
2007 Long-Term Incentive Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock authorized to be issued under plan (in shares) 400,000 3,300,000        
Award vesting period   5 years        
Exercise price of shares granted may not be less than fair market value (percentage)   100.00%        
2016 Long-Term Incentive Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock authorized to be issued under plan (in shares) 3,400,000         2,600,000
Exercise price of shares granted may not be less than fair market value (percentage) 100.00%