Segment Information (Schedule Of Intercompany Sales By Geographic Area) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Intercompany sales	$ 187,438	$ 166,944	$ 151,512	$ 147,758	$ 154,817	$ 135,717	$ 120,787	$ 102,079	$ 653,652	$ 513,400	$ 353,633
Americas [Member]
Segment Reporting Information [Line Items]
Intercompany sales									333,925	284,752	196,414
Germany [Member]
Segment Reporting Information [Line Items]
Intercompany sales									87,021	51,245	39,748
Other EMEA [Member]
Segment Reporting Information [Line Items]
Intercompany sales									109,066	82,536	60,939
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Intercompany sales									123,640	94,867	56,532
Intercompany Sales To Americas [Member]
Segment Reporting Information [Line Items]
Intercompany sales									79,055	30,346	5,204
Intercompany Sales To Americas [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Intercompany sales									201
Intercompany Sales To Americas [Member] | Germany [Member]
Segment Reporting Information [Line Items]
Intercompany sales									43,841	1,825	197
Intercompany Sales To Americas [Member] | Other EMEA [Member]
Segment Reporting Information [Line Items]
Intercompany sales									20,580	26,862	4,812
Intercompany Sales To Americas [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Intercompany sales									14,433	1,659	195
Intercompany Sales To Germany [Member]
Segment Reporting Information [Line Items]
Intercompany sales									9,967	25,429	6,849
Intercompany Sales To Germany [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Intercompany sales									3,217	23,100	6,823
Intercompany Sales To Germany [Member] | Other EMEA [Member]
Segment Reporting Information [Line Items]
Intercompany sales									6,742	1,688	26
Intercompany Sales To Germany [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Intercompany sales									8	641
Intercompany Sales To Other EMEA [Member]
Segment Reporting Information [Line Items]
Intercompany sales									50,558	21,914	6,613
Intercompany Sales To Other EMEA [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Intercompany sales									42,622	15,622	4,153
Intercompany Sales To Other EMEA [Member] | Germany [Member]
Segment Reporting Information [Line Items]
Intercompany sales									3,131	4,135	2,205
Intercompany Sales To Other EMEA [Member] | Other EMEA [Member]
Segment Reporting Information [Line Items]
Intercompany sales									2,066	2,090	255
Intercompany Sales To Other EMEA [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Intercompany sales									2,739	67
Intercompany Sales To Asia Pacific [Member]
Segment Reporting Information [Line Items]
Intercompany sales									5,042	7,435	1,082
Intercompany Sales To Asia Pacific [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Intercompany sales									2,283	5,438	1,044
Intercompany Sales To Asia Pacific [Member] | Other EMEA [Member]
Segment Reporting Information [Line Items]
Intercompany sales										566	38
Intercompany Sales To Asia Pacific [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Intercompany sales									2,759	1,431
Intercompany Sales [Member]
Segment Reporting Information [Line Items]
Intercompany sales									144,622	85,124	19,748
Intercompany Sales [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Intercompany sales									48,323	44,160	12,020
Intercompany Sales [Member] | Germany [Member]
Segment Reporting Information [Line Items]
Intercompany sales									46,972	5,960	2,402
Intercompany Sales [Member] | Other EMEA [Member]
Segment Reporting Information [Line Items]
Intercompany sales									29,388	31,206	5,131
Intercompany Sales [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Intercompany sales									$ 19,939	$ 3,798	$ 195