Capital Stock Repurchase Plan Transactions (Schedule Of Repurchased Capital Stock) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Capital Stock Repurchase Plan Transactions [Abstract]
Total cost of repurchased shares	$ 23,884	$ 163,731	$ 101,098	$ 330,380
Shares repurchased	50,000	350,000	207,500	700,000
Weighted average price per share	$ 477.68	$ 467.80	$ 487.22	$ 471.97

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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