Quarterly report pursuant to Section 13 or 15(d)

Business Combinations Business Combination - Exar (Details)

v3.10.0.1
Business Combinations Business Combination - Exar (Details) - USD ($)
$ / shares in Units, $ in Thousands
May 12, 2017
Jun. 30, 2018
Dec. 31, 2017
Business Acquisition [Line Items]      
Goodwill   $ 238,330 $ 237,992
Exar Corporation [Member]      
Business Acquisition [Line Items]      
Business Combination, Consideration Transferred $ 692,727    
Business acquisition, Shares Tendered 51,953,635    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents $ 235,810    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables 11,363    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory 48,536    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets 2,288    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 3,442    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill 249,500    
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets 7,955    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets 5,434    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable (12,385)    
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Accrued Expenses and Other Current Liabilities (11,264)    
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Accrued Compensation (5,253)    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other (3,030)    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net 532,396    
Goodwill 160,331    
Business Combination, Purchase price $ 692,727    
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 6 years    
Finite-lived Intangible Assets Acquired $ 232,900    
Business Combination, Finite and Indefinite Lived Intangible Assets Acquired 249,500    
Exar Corporation [Member] | In Process Research and Development [Member]      
Business Acquisition [Line Items]      
Indefinite-lived Intangible Assets Acquired $ 16,600    
Exar Corporation [Member] | Developed technology      
Business Acquisition [Line Items]      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 7 years    
Finite-lived Intangible Assets Acquired $ 120,900    
Exar Corporation [Member] | Trademarks and Trade Names [Member]      
Business Acquisition [Line Items]      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 6 years    
Finite-lived Intangible Assets Acquired $ 12,100    
Exar Corporation [Member] | Customer Relationships [Member]      
Business Acquisition [Line Items]      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 5 years    
Finite-lived Intangible Assets Acquired $ 96,300    
Exar Corporation [Member] | Order or Production Backlog [Member]      
Business Acquisition [Line Items]      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 6 months    
Finite-lived Intangible Assets Acquired $ 3,600    
Exar Corporation [Member] | Cash [Member]      
Business Acquisition [Line Items]      
Business Acquisition, Tender Amount 675,400    
Exar Corporation [Member] | Cash [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    
Stock Based Awards [Member] | Exar Corporation [Member]      
Business Acquisition [Line Items]      
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned $ 4,613    
Common Stock [Member] | Exar Corporation [Member]      
Business Acquisition [Line Items]      
Business Acquisition, Share Price $ 13.00