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Equity Incentive Plan (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 29, 2024
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Equity Incentive Plan              
Maximum number of common shares available for issuance (in shares)   6,828,527   6,828,527      
Other Disclosures              
Common shares available for future grant (in shares)   2,041,822   2,041,822      
Restricted share awards              
Summary of non-vested shares/units              
Unvested at the beginning of the period (in shares)       2,305,303      
Granted (in shares)       925,731      
Vested (in shares)       (1,569,836)      
Forfeited (in shares)       (20,157)      
Unvested at the end of the period (in shares)   1,641,041   1,641,041      
Weighted Average Grant Date Fair Value              
Unvested at the beginning of the period (in dollars per share)       $ 13.52      
Granted (in dollars per share)       11.57      
Vested (in dollars per share)       14.28      
Forfeited (in dollars per share)       11.26      
Unvested at the end of the period (in dollars per share)   $ 11.72   $ 11.72      
Other Disclosures              
Share-based compensation expense   $ 3.0 $ 3.8 $ 7.1 $ 7.4    
Total unrecognized compensation costs   16.0   $ 16.0      
Weighted-average period of recognition of unrecognized share-based compensation expense       2 years      
Total fair value of shares vested       $ 17.4 9.5    
Performance Units              
Other Disclosures              
Share-based compensation expense   2.3 $ 2.3 4.6 $ 4.4    
Total unrecognized compensation costs   $ 16.4   $ 16.4      
Weighted-average period of recognition of unrecognized share-based compensation expense       2 years 1 month 6 days      
Performance-based vesting period       3 years      
Percentage of grant date fair value to be recognized over three years       100.00%      
Employee service share based compensation cost period of recognition       3 years      
Share-based compensation arrangement, by share based payment award, vesting rights percentage immediately       100.00%      
2021 Performance Shares              
Summary of non-vested shares/units              
Granted (in shares) 253,000           431,151
Other Disclosures              
Total fair value of shares vested       $ 3.0      
Share-Based Compensation Arrangement by Share-Based Payment Award, Contingent on Absolute Total Shareholder Return       25.00%      
Share-Based Compensation Arrangement by Share-Based Payment Award, Contingent on Relative Total Shareholder Return       75.00%      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Intrinsic Value, Amount Per Share             $ 20.90
Fair value assumptions, risk free interest rate             0.23%
Fair value assumptions, expected volatility rate             69.47%
2022 Performance Shares              
Summary of non-vested shares/units              
Granted (in shares)           407,024  
Other Disclosures              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Intrinsic Value, Amount Per Share           $ 21.96  
Fair value assumptions, risk free interest rate           1.70%  
Fair value assumptions, expected volatility rate           70.15%  
2023 Performance Shares              
Summary of non-vested shares/units              
Granted (in shares)         574,846    
Other Disclosures              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Intrinsic Value, Amount Per Share         $ 16.90    
Fair value assumptions, risk free interest rate         4.33%    
Fair value assumptions, expected volatility rate         66.70%    
2024 Performance Shares [Domain]              
Summary of non-vested shares/units              
Granted (in shares)       703,325      
Other Disclosures              
Shared-based compensation arrangement by share based payment award, maximum absolute total shareholder return decline before payout percentage cap       15.00%      
Shared-based compensation arrangement by share based payment award, payout percentage cap       115.00%      
Shared-based compensation arrangement by share based payment award, payout percentage reduction       25.00%      
Shared-based compensation arrangement by share based payment award, absolute total shareholder return minimum before payout percentage reduction       0.0      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Intrinsic Value, Amount Per Share       $ 15.13      
Fair value assumptions, risk free interest rate       4.43%      
Fair value assumptions, expected volatility rate       35.60%      
Minimum | 2021 Performance Shares              
Other Disclosures              
Percentage of performance units that will convert into restricted shares       0.00%      
Shared-Based Compensation Arrangement by Share-Based Payment Award, Conversion Percentage Range             0.00%
Minimum | 2022 Performance Shares              
Other Disclosures              
Shared-Based Compensation Arrangement by Share-Based Payment Award, Conversion Percentage Range           0.00%  
Minimum | 2023 Performance Shares              
Other Disclosures              
Shared-Based Compensation Arrangement by Share-Based Payment Award, Conversion Percentage Range         0.00%    
Minimum | 2024 Performance Shares [Domain]              
Other Disclosures              
Shared-Based Compensation Arrangement by Share-Based Payment Award, Conversion Percentage Range       0.00%      
Maximum | 2021 Performance Shares              
Other Disclosures              
Percentage of performance units that will convert into restricted shares       200.00%      
Shared-Based Compensation Arrangement by Share-Based Payment Award, Conversion Percentage Range             200.00%
Maximum | 2022 Performance Shares              
Other Disclosures              
Shared-Based Compensation Arrangement by Share-Based Payment Award, Conversion Percentage Range           200.00%  
Maximum | 2023 Performance Shares              
Other Disclosures              
Shared-Based Compensation Arrangement by Share-Based Payment Award, Conversion Percentage Range         200.00%    
Maximum | 2024 Performance Shares [Domain]              
Other Disclosures              
Shared-Based Compensation Arrangement by Share-Based Payment Award, Conversion Percentage Range       200.00%