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Employee Benefit Plans (Components Of Net Periodic Benefit Expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Retirement Benefits [Abstract]      
Service cost $ 4,196 $ 3,693 $ 3,207
Interest cost on projected benefit obligation 2,202 2,537 2,777
Expected return on plan assets (5,225) (5,136) (4,736)
Amortization of unrecognized loss 724 1,270 1,445
Net periodic pension cost $ 1,897 $ 2,364 $ 2,693