Quarterly report pursuant to Section 13 or 15(d)

Business Combinations (Details Textuals)

v3.10.0.1
Business Combinations (Details Textuals) - USD ($)
$ / shares in Units, $ in Thousands
May 12, 2017
Sep. 30, 2018
Dec. 31, 2017
Apr. 04, 2017
Nov. 09, 2016
Business Acquisition [Line Items]          
Indefinite-lived intangible assets     $ 4,400    
Goodwill   $ 238,330 $ 237,992    
Exar Corporation [Member]          
Business Acquisition [Line Items]          
Business Acquisition, Effective Date of Acquisition May 12, 2017        
Business Acquisition, Name of Acquired Entity Exar Corporation        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents $ 235,810        
Proceeds from Issuance of Debt 416,800        
Long-term Debt, Gross $ 425,000        
Business Combination, Indemnification Assets, Amount as of Acquisition Date         $ 5,000
G.hn business of Marvell [Member]          
Business Acquisition [Line Items]          
Business Combination, Purchase price       $ 21,000  
Common Stock [Member] | Exar Corporation [Member]          
Business Acquisition [Line Items]          
Business Acquisition, Share Price $ 13.00        
Cash [Member] | Exar Corporation [Member]          
Business Acquisition [Line Items]          
Business Combination, Consideration Transferred $ 688,114        
Cash in lieu of equity [Member] | Exar Corporation [Member]          
Business Acquisition [Line Items]          
Business Combination, Consideration Transferred $ 12,700        
In Process Research and Development [Member] | Exar Corporation [Member]          
Business Acquisition [Line Items]          
Indefinite-lived intangible assets   $ 4,400