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Shareholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
May 31, 2023
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Apr. 18, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Increase (decrease) in stock-based compensation from change in management's estimate       $ 4,859    
Unrecognized compensation cost   $ 90,469   90,469    
Total intrinsic value of options exercised       22,444    
Aggregate intrinsic value of options exercisable   $ 60,297   $ 60,297    
Market value of Company's common stock (in USD per share)   $ 60.23   $ 60.23    
Weighted average exercise price per share (in USD per share)   $ 53.90   $ 53.90    
Total options outstanding (in shares)   16,445   16,445    
Total options exercisable (in shares)   7,581   7,581    
Dividends declared (in USD per share) $ 0.43 $ 0 $ 0 $ 0.43 $ 0.40  
Cash dividends declared       $ 57,177 $ 54,378  
Common Stock Buyback            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares purchased and retired (in shares)       4,050    
Company purchased, cost       $ 241,848    
Additional authorized amount           $ 250,000
Remaining stock repurchase authorization amount           $ 101,005
2014 Plan | Tranche One            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting rate       50.00%    
2014 Plan | Tranche Two            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting rate       50.00%    
Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award waiting period       2 years    
Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award waiting period       4 years