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Summary Of Significant Accounting Policies (Schedule Of Goodwill) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 02, 2015
Oct. 03, 2014
Sep. 27, 2013
Goodwill [Line Items]      
Goodwill, balance at beginning of period $ 14,416 $ 21,053  
Impairment 0 (6,475) $ 0
Amount attributable to movements in foreign currency rates (124) (162)  
Goodwill, Balance at end of period 14,292 14,416 21,053
Gross Goodwill 60,682 60,806 60,968
Accumulated Impairment 46,390 46,390 39,915
Marine Electronics [Member]      
Goodwill [Line Items]      
Goodwill, balance at beginning of period $ 10,367 $ 10,367  
Impairment    
Amount attributable to movements in foreign currency rates  
Goodwill, Balance at end of period $ 10,367 $ 10,367 10,367
Diving [Member]      
Goodwill [Line Items]      
Goodwill, balance at beginning of period 4,049 4,211  
Amount attributable to movements in foreign currency rates (124) (162)  
Goodwill, Balance at end of period $ 3,925 4,049 4,211
Outdoor Equipment [Member]      
Goodwill [Line Items]      
Goodwill, balance at beginning of period   6,475  
Impairment   $ (6,475)  
Goodwill, Balance at end of period     $ 6,475