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Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 185,392 $ 183,879
Accumulated amortization (121,161) (113,902)
Net carrying amount 64,231 69,977
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 100,136 100,228
Accumulated amortization (59,680) (53,429)
Net carrying amount 40,456 46,799
Purchased Software Costs [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 49,788 46,183
Accumulated amortization (34,325) (33,307)
Net carrying amount 15,463 12,876
Technology Licenses [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 26,800 28,800
Accumulated amortization (26,800) (26,833)
Net carrying amount 0 1,967
Trade Names and Trademarks [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 7,800 7,800
Accumulated amortization 0 0
Net carrying amount 7,800 7,800
Other Intangible Assets [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 868 868
Accumulated amortization (356) (333)
Net carrying amount $ 512 $ 535