Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 166,379	$ 165,314
Accumulated amortization	(64,271)	(57,906)
Net carrying amount	102,108	107,408
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	100,112	100,092
Accumulated amortization	(23,888)	(19,822)
Net carrying amount	76,224	80,270
Purchased Software Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	30,799	29,754
Accumulated amortization	(27,966)	(27,394)
Net carrying amount	2,833	2,360
Technology Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	26,800	26,800
Accumulated amortization	(12,192)	(10,477)
Net carrying amount	14,608	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	(225)	(213)
Net carrying amount	$ 643	$ 655