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Shareholders’ Equity and Stock Incentive Plans - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jan. 01, 2023
Jul. 31, 2023
Sep. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Jul. 27, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock repurchase, remaining authorized repurchase amount     $ 90,900,000     $ 90,900,000      
Common stock, dividends (USD per share)   $ 2.00              
Cash dividend paid   $ 57,700,000       57,727,000 $ 0    
Share-based compensation expense, net           $ 0 0    
Common stock available for grants of awards (in shares)     3,630,600     3,630,600      
Number of shares available for grant annual increase (in shares) 1,127,160                
2015 Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Common stock, dividends (USD per share)           $ 2.00      
Option                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share-based compensation expense, net     $ 0   $ 0        
Stock options, unrecognized share-based compensation expense     0   0 $ 0 0    
PSUs                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share-based compensation expense, net     1,400,000   1,500,000 $ 4,200,000 4,600,000    
Percentage of target number of PSU's eligible to vest at "maximum" performance level           200.00%      
Unamortized share-based compensation expense     7,000,000   8,300,000 $ 7,000,000 $ 8,300,000    
Share-based compensation expense not yet recognized, weighted-average period for recognition           1 year 1 month 6 days 10 months 24 days    
PSUs | Award Date, March 2020                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Percentage of target number of PSU's eligible to vest at "maximum" performance level           200.00%      
PSUs | Award Date, March 2021                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Percentage of target number of PSU's eligible to vest at "maximum" performance level           200.00%      
PSUs | Award Date, March 2023                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Percentage of target number of PSU's eligible to vest at "maximum" performance level           200.00%      
PSUs | Award Date, March 2022                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Percentage of target number of PSU's eligible to vest at "maximum" performance level           89.60%      
Actual number of PSUs granted to each recipient, eligible to vest (in shares)       74,880       83,579  
RSUs                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share-based compensation expense, net     2,000,000   1,800,000 $ 5,800,000 $ 5,100,000    
Unamortized share-based compensation expense     $ 9,100,000   $ 10,000,000 $ 9,100,000 $ 10,000,000    
Share-based compensation expense not yet recognized, weighted-average period for recognition           1 year 4 months 24 days 1 year 4 months 24 days    
Common stock                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Common stock repurchase, authorized                 $ 100,000,000