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Stock Incentive Programs - Additional Information (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Plan
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
shares
Mar. 03, 2020
shares
Feb. 22, 2012
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Number of stock-based employee compensation plans | Plan 2        
Stock-based compensation expense | $ $ 12,600 $ 10,600 $ 10,500    
Income tax benefit recorded for stock-based compensation expense | $ $ 2,000 $ 1,700 $ 2,000    
Number of restricted shares granted | shares 0 0 0    
Number of shares outstanding | shares 0        
Proceeds from stock option exercises | $ $ 0 $ 0      
Tax benefit realized from exercises of stock-based compensation arrangements | $ 0 0 $ 0    
Total unrecognized compensation expense related to stock-based compensation arrangements | $ $ 32,500        
Weighted-average period of cost expected to be recognized 1 year 10 months 13 days        
Employee Stock Option [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Contractual term 10 years        
Restricted Stock [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation expense | $ $ 12,600 $ 10,600 $ 10,500    
Total fair value of options vested | $ $ 1,400        
Restricted Stock [Member] | Minimum [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Vesting period 1 year        
Restricted Stock [Member] | Maximum [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Vesting period 5 years        
2020 Stock Incentive Plan [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Common shares authorized for issuance | shares       2,500,000  
Number of restricted shares granted | shares 26,231        
2012 Stock Incentive Plan [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Common shares authorized for issuance | shares         1,250,000
Number of restricted shares granted | shares 487,812        
Share issued | shares 370,313