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Stock-Based Compensation and Employee Benefit Plans (Summary of Stock Award Activity Under Incentive Plan) (Details) - $ / shares
shares in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding, beginning of year, Shares 58    
Outstanding, beginning of year, Grant Date Fair Value $ 1,064.67    
Granted, Shares 30    
Granted, Grant Date Fair Value $ 1,559.73 $ 1,492.15 $ 905.96
Vested, Shares (24)    
Vested, Grant Date Fair Value $ 798.11    
Forfeited, Shares (9)    
Forfeited, Grant Date Fair Value $ 1,369.09    
Outstanding, end of year, Shares 55 58  
Outstanding, end of year, Grant Date Fair Value $ 1,396.78 $ 1,064.67  
Vested and expected to vest, end of year, Shares 50    
Vested and expected to vest, end of year, Grant Date Fair Value $ 1,382.72    
Performance Shares [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding, beginning of year, Shares 105    
Outstanding, beginning of year, Grant Date Fair Value $ 928.28    
Granted, Shares 24    
Granted, Grant Date Fair Value $ 1,569.39 $ 1,479.55 $ 853.03
Vested, Shares (54)    
Vested, Grant Date Fair Value $ 791.65    
Expired, Shares (6)    
Expired, Grant Date Fair Value $ 1,117.45    
Outstanding, end of year, Shares 69 105  
Outstanding, end of year, Grant Date Fair Value $ 1,194.80 $ 928.28  
Vested and expected to vest, end of year, Shares 116    
Vested and expected to vest, end of year, Grant Date Fair Value $ 1,097.75