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)

v3.19.2
Goodwill and Other Intangible Assets (Schedule of Other Intangible Assets) (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 458,886 $ 457,963
Accumulated Amortization (362,885) (350,689)
Net Book Value 96,001 107,274
Developed technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 299,100 299,100
Accumulated Amortization (244,256) (236,375)
Net Book Value 54,844 62,725
Patents [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 11,022 10,127
Accumulated Amortization (6,193) (5,752)
Net Book Value 4,829 4,375
Trademarks and trade names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 26,239 26,212
Accumulated Amortization (19,650) (19,067)
Net Book Value 6,589 7,145
Customer relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 102,984 102,984
Accumulated Amortization (73,473) (70,353)
Net Book Value 29,511 32,631
Capitalized software development costs [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 19,541 19,540
Accumulated Amortization (19,313) (19,142)
Net Book Value $ 228 $ 398