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Share-Based Employee Compensation - Additional Information (Details)
3 Months Ended 6 Months Ended
Mar. 08, 2021
USD ($)
$ / shares
shares
Jun. 30, 2021
USD ($)
$ / shares
shares
Jun. 30, 2020
USD ($)
$ / shares
shares
Jun. 30, 2021
USD ($)
plan
$ / shares
shares
Jun. 30, 2020
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shareholder approved stock plans | plan       3  
Share price | $ / shares   $ 31.11   $ 31.11  
Cost (reversal) of employee share-based compensation included in income, before income tax   $ 11,036,000 $ 2,933,000 $ 15,648,000 $ 4,794,000
Replacement Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options converted in connection with acquisition (in shares) | shares 3,168,000        
Stock options converted in connection with acquisition $ 5,343,000        
Restricted stock awards converted in connection with acquisition (in shares) | shares 188,000        
Restricted stock awards converted in connection with acquisition $ 4,794,000        
Share price | $ / shares $ 29.52        
Risk free interest rate 0.60%        
Expected term 3 years 8 months 12 days        
Expected volatility rate 55.10%        
Cost (reversal) of employee share-based compensation included in income, before income tax   1,572,000   $ 1,978,000  
Replacement Awards | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period       1 year  
Replacement Awards | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period       3 years  
Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment arrangement, nonvested award, excluding option, cost not yet recognized, amount   3,792,000   $ 3,792,000  
Number of years compensation expense to be recognized over       1 year 8 months 12 days  
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment arrangement, nonvested award, option, cost not yet recognized, amount   $ 4,061,000   $ 4,061,000  
Number of years compensation expense to be recognized over       1 year 6 months  
Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of years compensation expense to be recognized over       2 years 3 months 18 days  
Number of stock units granted (in shares) | shares       1,109,000 1,109,000
Stock units, weighted average grant-date fair value (in dollars per share) | $ / shares   $ 29.66 $ 14.15 $ 29.61 $ 17.83
Compensation expense related to restricted stocks   $ 3,775,000 $ 1,362,000 $ 5,950,000 $ 2,977,000
Total unrecognized compensation expense related to non-vested shares granted   $ 45,873,000   $ 45,873,000  
Restricted Stock Units (RSUs) | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award requisite service period       1 year  
Restricted Stock Units (RSUs) | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award requisite service period       5 years  
Restricted Stock Units, Inducement Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of stock units granted (in shares) | shares   122,000 134,000 774,000 402,000
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Cost (reversal) of employee share-based compensation included in income, before income tax   $ 5,692,000 $ 1,572,000 $ 7,720,000 $ 1,817,000
Number of years compensation expense to be recognized over         2 years 4 months 24 days
Number of stock units granted (in shares) | shares   95,000 0 1,440,000  
Stock units, weighted average grant-date fair value (in dollars per share) | $ / shares   $ 27.11   $ 29.42 $ 19.66
Total unrecognized compensation expense related to non-vested shares granted   $ 70,749,000   $ 70,749,000  
Performance Shares | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period       3 years  
Award requisite service period       1 year  
Performance Shares | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period       5 years  
Award requisite service period       5 years  
Performance Shares, Inducement Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of stock units granted (in shares) | shares       1,149,000 125,000