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)

v3.19.3
Goodwill and Other Intangible Assets (Schedule of Other Intangible Assets) (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 459,452 $ 457,963
Accumulated Amortization (369,155) (350,689)
Net Book Value 90,297 107,274
Developed technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 299,100 299,100
Accumulated Amortization (248,197) (236,375)
Net Book Value 50,903 62,725
Patents [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 11,739 10,127
Accumulated Amortization (6,510) (5,752)
Net Book Value 5,229 4,375
Trademarks and trade names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 26,235 26,212
Accumulated Amortization (19,933) (19,067)
Net Book Value 6,302 7,145
Customer relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 102,837 102,984
Accumulated Amortization (75,116) (70,353)
Net Book Value 27,721 32,631
Capitalized software development costs [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 19,541 19,540
Accumulated Amortization (19,399) (19,142)
Net Book Value $ 142 $ 398