Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Schedule of Goodwill (Details)

v3.8.0.1
Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Goodwill [Line Items]      
Impairment of Intangible Assets (Excluding Goodwill) $ 2,000,000    
Goodwill 237,992,000 $ 76,015,000 $ 49,779,000
Goodwill, Acquired During Period 162,318,000 26,236,000  
Goodwill impairment loss 0    
Wireless Infrastructure Backhaul Business of Broadcom Corporation [Member]      
Goodwill [Line Items]      
Goodwill, Purchase Accounting Adjustments $ (341,000) 0  
Entropic Communications [Member]      
Goodwill [Line Items]      
Impairment of Intangible Assets (Excluding Goodwill)     17,800,000
Indefinite-lived Intangible Assets [Member]      
Goodwill [Line Items]      
Impairment of Intangible Assets (Excluding Goodwill)   $ 1,300,000 $ 21,600,000