Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 166,610	$ 165,314
Accumulated amortization	(67,733)	(57,906)
Net carrying amount	98,877	107,408
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	100,123	100,092
Accumulated amortization	(25,925)	(19,822)
Net carrying amount	74,198	80,270
Purchased Software Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	31,019	29,754
Accumulated amortization	(28,248)	(27,394)
Net carrying amount	2,771	2,360
Technology Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	26,800	26,800
Accumulated amortization	(13,329)	(10,477)
Net carrying amount	13,471	16,323
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	(231)	(213)
Net carrying amount	$ 637	$ 655