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Changes in Stockholders' Equity (Narrative) (Details) - USD ($)
1 Months Ended 2 Months Ended 3 Months Ended 9 Months Ended
Oct. 26, 2023
Apr. 27, 2023
Jan. 19, 2022
Nov. 30, 2021
Dec. 31, 2021
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock repurchased and retired       $ 60,000,000   $ 0   $ 0  
Stock repurchased and retired (in shares)         393,733        
Stock repurchase program, outstanding balance authorized to be repurchased           $ 110,000,000   $ 110,000,000  
Percentage increase in quarterly dividend   21.00%              
Dividend rate (in dollars per share)   $ 0.29              
Dividends declared (in dollars per share)   $ 5.00              
Cash dividends declared and paid per common share (in dollars per share)           $ 0.29 $ 0.24 $ 5.81 $ 5.16
Subsequent Event                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Dividends declared (in dollars per share) $ 0.29                
Accelerated Share Repurchase                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock repurchased and retired (in shares)     113,824