Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narrative) (Details)

v3.8.0.1
Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Tax Credit Carryforward [Line Items]        
Federal statutory rate   35.00% 35.00% 35.00%
Foreign operating loss carryforward   $ 759    
Net tax expense   30,136    
Operating loss carryforward valuation allowance   12,823    
Accrual of withholding taxes on foreign earnings   12,562    
Foreign tax credit carryforwards   2,278    
Revaluation of deferred tax assets and liabilities   2,681    
Repatriation tax   2,070    
Valuation allowance on foreign tax credit   10,057    
Valuation allowance on research credit   633    
Valuation allowance on mirrored deferred tax assets   2,133    
Unlimited carryforward   2,203    
Net operating losses   795 $ 424  
Scenario, Plan [Member]        
Tax Credit Carryforward [Line Items]        
Federal statutory rate 21.00%      
Domestic And Foreign Tax Authority [Member]        
Tax Credit Carryforward [Line Items]        
Net operating losses   $ 398    
Minimum [Member] | Research Tax Credit Carryforward [Member]        
Tax Credit Carryforward [Line Items]        
Expiration year for tax credit carryforwards   2036    
Minimum [Member] | Foreign Tax Authority [Member]        
Tax Credit Carryforward [Line Items]        
Expiration year for tax credit carryforwards   2026    
Maximum [Member] | Research Tax Credit Carryforward [Member]        
Tax Credit Carryforward [Line Items]        
Expiration year for tax credit carryforwards   2037    
Maximum [Member] | Foreign Tax Authority [Member]        
Tax Credit Carryforward [Line Items]        
Expiration year for tax credit carryforwards   2027