Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Goodwill and Other Intangible Assets (Schedule of Other Intangible Assets) (Details)

v3.7.0.1
Goodwill and Other Intangible Assets (Schedule of Other Intangible Assets) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 478,309 $ 477,705
Accumulated Amortization (309,007) (300,247)
Net Book Value 169,302 177,458
Developed Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 304,766 304,766
Accumulated Amortization (204,090) (198,632)
Net Book Value 100,676 106,134
Patents [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 19,485 19,009
Accumulated Amortization (12,733) (12,257)
Net Book Value 6,752 6,752
Trademarks and Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 27,820 27,819
Accumulated Amortization (17,204) (16,849)
Net Book Value 10,616 10,970
Customer relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 106,697 106,571
Accumulated Amortization (56,539) (54,258)
Net Book Value 50,158 52,313
Capitalized Software Development Costs [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 19,541 19,540
Accumulated Amortization (18,441) (18,251)
Net Book Value $ 1,100 $ 1,289