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Stock-Based Compensation - Additional Information (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Apr. 29, 2020
shares
Jun. 30, 2021
USD ($)
shares
Sep. 30, 2020
shares
Jun. 30, 2021
USD ($)
$ / shares
shares
Jun. 30, 2020
USD ($)
May 01, 2019
shares
Oct. 07, 2016
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted (in shares)       0      
Restricted stock awards              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Weighted average grant-date fair value (in dollars per share) | $ / shares       $ 0      
Fair value of vested restricted stock awards | $       $ 2,700 $ 4,600    
Unrecognized compensation costs | $   $ 13,800   $ 13,800      
Unrecognized compensation costs, period for recognition       1 year 6 months      
Granted (in shares)       0      
Stock option awards              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Unrecognized compensation costs, period for recognition       9 months 18 days      
Fair value of stock options vested | $       $ 500 $ 4,200    
Intrinsic value of options exercised | $       71      
Unrecognized compensation costs for stock options | $   400   $ 400      
Performance stock units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period       3 years      
Unrecognized compensation costs | $   1,100   $ 1,100      
Unrecognized compensation costs, period for recognition       1 year      
Cash-settled Restricted Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Unrecognized compensation costs | $   8,700   $ 8,700      
Unrecognized compensation costs, period for recognition       1 year 7 months 6 days      
Granted (in shares)     5,500,000        
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period       3 years      
Cash-settled Performance Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Unrecognized compensation costs | $   $ 41,000   $ 41,000      
Unrecognized compensation costs, period for recognition       2 years      
Granted (in shares)     5,500,000        
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period       3 years      
2016 Long Term Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares authorized (in shares)             16,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized 8,250,000            
Number of shares available for grant (in shares)   6,645,120   6,645,120      
2016 Long Term Incentive Plan | Stock option awards              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period       3 years      
Option expiration period       10 years      
2019 Employee Stock Purchase Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares authorized (in shares)           2,000,000  
Number of shares available for grant (in shares)   1,561,164   1,561,164      
Officer and employees | Restricted stock awards              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period       3 years      
Director | Restricted stock awards              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period       1 year      
Maximum | Cash-settled Restricted Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award rights, percentage return   4          
Minimum | Cash-settled Restricted Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award rights, percentage return   0.25