Goodwill and Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 179,087	$ 176,723
Accumulated amortization	(124,026)	(118,537)
Net carrying amount	55,061	58,186
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	100,090	100,072
Accumulated amortization	(69,148)	(65,958)
Net carrying amount	30,942	34,114
Capitalized Purchased Software Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	54,829	52,483
Accumulated amortization	(38,989)	(36,702)
Net carrying amount	15,840	15,781
Technology Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	15,500	15,500
Accumulated amortization	(15,500)	(15,500)
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	(389)	(377)
Net carrying amount	$ 479	$ 491