Quarterly report pursuant to Section 13 or 15(d)

Business Combinations Business Combination - Exar (Details)

v3.8.0.1
Business Combinations Business Combination - Exar (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
May 12, 2017
Sep. 30, 2017
Sep. 30, 2017
Dec. 31, 2016
Nov. 09, 2016
Business Acquisition [Line Items]          
Balance as of December 31, 2016   $ 239,673 $ 239,673 $ 76,015  
Exar and G.hn business [Member]          
Business Acquisition [Line Items]          
Finite-lived Intangible Assets Acquired     245,500    
Exar Corporation [Member]          
Business Acquisition [Line Items]          
Goodwill, Purchase Accounting Adjustments   1,000      
Finite-lived Intangible Assets Acquired $ 232,900        
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 2,351        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 4,273        
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 4,830        
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 (10,371)        
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Accrued Compensation (5,258)        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other (3,030)        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net 531,053        
Balance as of December 31, 2016 161,674        
Business Combination, Purchase price 692,727        
Business Combination, Finite and Indefinite Lived Intangible Assets Acquired $ 249,500        
Business Acquisition, Effective Date of Acquisition May 12, 2017        
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Fair Value Mark Up On Inventory $ 24,286        
Business Combination, Indemnification Assets, Amount as of Acquisition Date   5,000 5,000   $ 5,000
Business Acquisition, Name of Acquired Entity Exar Corporation        
Business Combination, Consideration Transferred $ 692,727        
Proceeds from Issuance of Debt $ 416,800        
Long-term Debt, Gross   425,000 425,000    
Business acquisition, Shares Tendered 51,953,635        
Exar Corporation [Member] | Common Stock [Member]          
Business Acquisition [Line Items]          
Business Acquisition, Share Price $ 13.00        
Exar Corporation [Member] | Cost of Sales [Member]          
Business Acquisition [Line Items]          
Business Combination, Amortization of Inventory Step-Up   9,700 $ 14,600    
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 12,717        
Stock Based Awards [Member] | Exar Corporation [Member]          
Business Acquisition [Line Items]          
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned $ 4,613        
Customer Relationships [Member] | Exar Corporation [Member]          
Business Acquisition [Line Items]          
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 5 years        
Finite-lived Intangible Assets Acquired $ 96,300        
Order or Production Backlog [Member] | Exar Corporation [Member]          
Business Acquisition [Line Items]          
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 6 months        
Finite-lived Intangible Assets Acquired $ 3,600        
Developed technology | Exar Corporation [Member]          
Business Acquisition [Line Items]          
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 7 years        
Finite-lived Intangible Assets Acquired $ 120,900        
Trademarks and Trade Names [Member] | Exar Corporation [Member]          
Business Acquisition [Line Items]          
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 6 years        
Finite-lived Intangible Assets Acquired $ 12,100        
In Process Research and Development [Member] | Exar Corporation [Member]          
Business Acquisition [Line Items]          
Indefinite-lived Intangible Assets Acquired 16,600        
Other Current Assets [Member] | Exar Corporation [Member]          
Business Acquisition [Line Items]          
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets   1,100      
Fair Value Adjustment to Inventory [Member] | Exar Corporation [Member]          
Business Acquisition [Line Items]          
Amortization   700      
Fair Value Adjustment to Inventory [Member] | Exar Corporation [Member] | Cost of Sales [Member]          
Business Acquisition [Line Items]          
Amortization   1,000      
Fair Value Adjustment to Inventory [Member] | Exar Corporation [Member] | Selling, General and Administrative Expenses [Member]          
Business Acquisition [Line Items]          
Amortization   $ (300)      
Cash [Member] | Exar Corporation [Member]          
Business Acquisition [Line Items]          
Business Acquisition, Tender Amount $ 675,400