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Earnings Per Common Share And Share Awards Summary Of Share-Based Award Transactions (Details) - SARs - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, SARS, Outstanding [Roll Forward]          
Number Of Shares, Outstanding Beginning Balance     35 36  
Number Of Shares, SARs granted 5 5 5 5  
Number Of Shares, SARS exercised     (4) (6)  
Number Of Shares, Outstanding Ending Balance 36   36 35 36
Number Of Shares, Exercisable as of June 30, 2022 27   27    
Number Of Shares, Unvested as of June 30, 2022 9   9    
Share-based Compensation Arrangement by Share-based Payment Award, SARs, Outstanding, Weighted Average Exercise Price [Roll Forward]          
Weighted Average Exercise Price, Outstanding Beginning Balance     $ 150.36 $ 139.16  
Weighted Average Exercise Price, SARs granted     166.90 184.26  
Weighted Average Exercise Price, SARS exercised     89.23 106.71  
Weighted Average Exercise Price, Outstanding Ending Balance $ 159.32   159.32 $ 150.36 $ 139.16
Weighted Average Exercise Price, Exercisable as of June 30, 2022 161.95   161.95    
Weighted Average Exercise Price, Unvested as of June 30, 2022 $ 151.27   $ 151.27    
Average Remaining Contractual Term, Outstanding Beginning Balance     4 years 1 month 28 days 3 years 11 months 15 days 4 years 4 months 17 days
Average Remaining Contractual Term, Outstanding Ending Balance     4 years 1 month 28 days 3 years 11 months 15 days 4 years 4 months 17 days
Average Remaining Contractual Term, Exercisable as of June 30, 2022     3 years 7 months 24 days    
Average Remaining Contractual Term, Unvested as of June 30, 2022     5 years 8 months 23 days    
Aggregate Intrinsic Value, Outstanding Beginning Balance     $ 1,643 $ 903  
Aggregate Intrinsic Value, Outstanding Ending Balance $ 407   407 $ 1,643 $ 903
Aggregate Intrinsic Value, Exercisable as of June 30, 2022 324   324    
Aggregate Intrinsic Value, Unvested as of June 30, 2022 $ 83   $ 83