Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets Goodwill and Intangibles Other (Details 2)

v3.10.0.1
Goodwill and Intangible Assets Goodwill and Intangibles Other (Details 2) - USD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Indefinite-lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months $ 56,819,000    
Other Indefinite-lived Intangible Assets   $ 4,400,000 $ 22,400,000
Impairment losses 2,198,000 2,000,000 1,300,000
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) 0    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 55,954,000    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 55,171,000    
2019 37,641,000    
2020 25,446,000    
Finite-Lived Intangible Assets, Amortization Expense, after Year Five 9,469,000    
Finite-Lived Intangible Assets, Net 240,500,000 310,645,000 $ 81,861,000
Entropic Communications [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Indefinite-lived Intangible Assets, Purchase Accounting Adjustments   16,600,000  
In Process Research and Development [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Intangible Assets, Transfer from IPRD to Developed Tech 0 (32,600,000)  
In Process Research and Development [Member] | Exar Corporation [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Indefinite-lived Intangible Assets, Purchase Accounting Adjustments 0    
Indefinite-lived Intangible Assets [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Other Indefinite-lived Intangible Assets $ 4,400,000    
Impairment losses   $ 2,000,000