Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

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

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Other Intangible Assets (Schedule of Other Intangible Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 461,799 $ 457,963
Accumulated Amortization (374,471) (350,689)
Net Book Value 87,328 107,274
Developed Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 299,100 299,100
Accumulated Amortization (252,136) (236,375)
Net Book Value 46,964 62,725
Patents [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 15,142 10,127
Accumulated Amortization (7,067) (5,752)
Net Book Value 8,075 4,375
Trademarks and trade names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 25,991 26,212
Accumulated Amortization (19,966) (19,067)
Net Book Value 6,025 7,145
Customer relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 102,936 102,984
Accumulated Amortization (76,813) (70,353)
Net Book Value 26,123 32,631
Capitalized Software Development Costs [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 18,630 19,540
Accumulated Amortization (18,489) (19,142)
Net Book Value $ 141 $ 398