Annual report pursuant to Section 13 and 15(d)

Intangible Assets, Net and Goodwill (Schedule of Identifiable Intangible Assets) (Details)

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Intangible Assets, Net and Goodwill (Schedule of Identifiable Intangible Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Summary of Identifiable Intangible Assets [Line Items]    
Gross carrying amount $ 37,198 $ 37,198
Accumulated amortization (19,181) (14,035)
Net carrying amount 18,017 23,163
Intangible assets not subject to amortization 115,421 115,421
Intangible assets, net 133,438 138,584
Patents And Purchased Technology [Member]    
Summary of Identifiable Intangible Assets [Line Items]    
Gross carrying amount 14,198 14,198
Accumulated amortization (9,321) (7,992)
Customer Relationships [Member]    
Summary of Identifiable Intangible Assets [Line Items]    
Gross carrying amount 23,000 23,000
Accumulated amortization $ (9,860) $ (6,043)