Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narrative) (Details)

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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Operating Loss Carryforwards [Line Items]    
Income tax rate, percentage 34.00%  
Undistributed earnings of foreign subsidiaries $ 75,500  
Gross deferred tax assets $ 12,361 $ 15,858
Change in deferred tax assets valuation allowance 50.00% 50.00%
Domestic Tax Authority    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards $ 8,500 $ 18,300
Gross deferred tax assets 2,900 6,300
State and Local Jurisdiction    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards $ 41,600 $ 45,400