XML 73 R58.htm IDEA: XBRL DOCUMENT v3.22.4
Equity Incentive Plan - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 12 Months Ended
Feb. 28, 2022
Feb. 28, 2019
Feb. 28, 2018
May 31, 2016
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares authorized (in shares)         6,828,527      
Common shares available for future grant (in shares)         3,560,347      
Restricted share awards                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Unvested restricted shares         2,267,870 2,380,283 1,252,228 940,202
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value         $ 15.32 $ 15.43 $ 15.17 $ 20.21
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period         569,600 1,739,327 801,463  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value         $ 15.10 $ 15.92 $ 11.95  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period         (647,426) (513,342) (480,444)  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value         $ 15.65 $ 16.51 $ 19.59  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period         (34,587) (97,930) (8,993)  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value         $ 13.15 $ 15.22 $ 18.80  
Share-based compensation expense         $ 14.4 $ 11.9 $ 8.7  
Total unrecognized compensation costs         $ 19.6      
Weighted-average period of recognition of unrecognized share-based compensation expense         1 year 6 months      
Total fair value of shares vested         $ 9.0 $ 7.8 $ 5.2  
2019 Performance Shares [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Unvested restricted shares         67,000      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 133,000           260,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value             $ 19.16  
Total fair value of shares vested         $ 0.8      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate             2.52%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate             27.19%  
2020 Performance Shares                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period           489,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value           $ 11.59    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate           1.08%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate           23.46%    
2021 Performance Shares                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period         431,151      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value         $ 20.90      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate         0.23%      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate         69.47%      
2022 Performance Units                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period         407,024      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value         $ 21.96      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate         1.70%      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate         70.15%      
Performance units                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation expense         $ 7.3 $ 5.2 $ 3.5  
Total unrecognized compensation costs         $ 10.5      
Weighted-average period of recognition of unrecognized share-based compensation expense         1 year 8 months 12 days      
2015 Equity Incentive Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     4 years          
Share Based Compensation Arrangement by Share Based Payment Award, Performance Based Vesting Period   3 years            
Share Based Compensation Arrangement by Share Based Payment Award, Time Based Vesting Period   1 year   1 year        
Share-based compensation arrangement, by share based payment award, vesting rights percentage immediately   50.00%            
Share-based compensation arrangement, by share-based payment award vesting rights, percentage after one year   50.00%            
Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options Percentage Of Grant Date Fair Value Recognized Over Three Years   50.00%            
Employee Service Share Based Compensation Nonvested Awards For First Fifty Percent Compensation Cost Not Yet Recognized Period For Recognition   3 years            
Employee Service Share Based Compensation Nonvested Awards For Remaining Fifty Percent Compensation Cost Not Yet Recognized Period For Recognition   50.00%            
Employee Service Share Based Compensation Nonvested Awards For Remaining Fifty Percent Cost Not Yet Recognized, Period For Recognition   4 years            
Share-Based Compensation Arrangement by Share-Based Payment Award, Contingent on Absolute Total Shareholder Return         40.00%      
Share-Based Compensation Arrangement by Share-Based Payment Award, Contingent on Relative Total Shareholder Return         60.00%      
2021 Equity Incentive Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation arrangement, by share based payment award, vesting rights percentage immediately   100.00%            
Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options Percentage Of Grant Date Fair Value Recognized Over Three Years         100.00%      
Employee Service Share Based Compensation Nonvested Awards For First Fifty Percent Compensation Cost Not Yet Recognized Period For Recognition         3 years      
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%      
Minimum | 2019 Performance Shares [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shared-based compensation arrangement by share based payment award, conversion percentage of units granted in period       0        
Minimum | 2020 Performance Shares                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shared-based compensation arrangement by share based payment award, conversion percentage of units granted in period             0  
Minimum | 2021 Performance Shares                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shared-based compensation arrangement by share based payment award, conversion percentage of units granted in period           0    
Minimum | 2022 Performance Units                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shared-based compensation arrangement by share based payment award, conversion percentage of units granted in period         0      
Minimum | 2015 Equity Incentive Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shared-based compensation arrangement by share based payment award, conversion percentage of units granted in period   0.00%            
Minimum | 2021 Equity Incentive Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shared-based compensation arrangement by share based payment award, conversion percentage of units granted in period   0.00%            
Maximum | 2019 Performance Shares [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shared-based compensation arrangement by share based payment award, conversion percentage of units granted in period       200        
Maximum | 2020 Performance Shares                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shared-based compensation arrangement by share based payment award, conversion percentage of units granted in period             200  
Maximum | 2021 Performance Shares                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shared-based compensation arrangement by share based payment award, conversion percentage of units granted in period           200    
Maximum | 2022 Performance Units                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shared-based compensation arrangement by share based payment award, conversion percentage of units granted in period         200      
Maximum | 2015 Equity Incentive Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shared-based compensation arrangement by share based payment award, conversion percentage of units granted in period   200.00%            
Maximum | 2021 Equity Incentive Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shared-based compensation arrangement by share based payment award, conversion percentage of units granted in period   200.00%