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
Jun. 30, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 478,687 $ 477,705
Accumulated Amortization (317,761) (300,247)
Net Book Value 160,926 177,458
Developed technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 304,766 304,766
Accumulated Amortization (209,549) (198,632)
Net Book Value 95,217 106,134
Patents [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 19,692 19,009
Accumulated Amortization (13,268) (12,257)
Net Book Value 6,424 6,752
Trademarks and trade names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 27,808 27,819
Accumulated Amortization (17,526) (16,849)
Net Book Value 10,282 10,970
Customer relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 106,880 106,571
Accumulated Amortization (58,816) (54,258)
Net Book Value 48,064 52,313
Capitalized software development costs [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 19,541 19,540
Accumulated Amortization (18,602) (18,251)
Net Book Value $ 939 $ 1,289