Segment Information (Schedule Of Depreciation And Amortization By Geographic Area) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 83,069	$ 55,188	$ 30,444
Americas [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	43,613	38,876	21,826
Germany [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	1,011	1,075	961
Other EMEA [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	33,585	11,427	4,410
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 4,860	$ 3,810	$ 3,247

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Name:	us-gaap_DepreciationAndAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration