Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 167,103	$ 165,314
Accumulated amortization	(70,817)	(57,906)
Net carrying amount	96,286	107,408
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	100,053	100,092
Accumulated amortization	(27,883)	(19,822)
Net carrying amount	72,170	80,270
Purchased Software Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	31,582	29,754
Accumulated amortization	(28,508)	(27,394)
Net carrying amount	3,074	2,360
Technology Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	26,800	26,800
Accumulated amortization	(14,189)	(10,477)
Net carrying amount	12,611	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	(237)	(213)
Net carrying amount	$ 631	$ 655