Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 187,359	$ 185,392
Accumulated amortization	(127,077)	(121,161)
Net carrying amount	60,282	64,231
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	99,981	100,136
Accumulated amortization	(64,282)	(59,680)
Net carrying amount	35,699	40,456
Purchased Software Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	51,910	49,788
Accumulated amortization	(35,621)	(34,325)
Net carrying amount	16,289	15,463
Technology Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	26,800	26,800
Accumulated amortization	(26,800)	(26,800)
Net carrying amount	0	0
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	(374)	(356)
Net carrying amount	$ 494	$ 512