Segments of Business (Narrative) (Details) $ in Thousands	6 Months Ended
Apr. 01, 2016 USD ($) customer	Apr. 03, 2015 customer
Customer Concentration Risk [Member]
Revenue, Major Customer [Line Items]
Number Of Customers		0
Marine Electronics, Outdoor Equipment and Watercraft [Member]
Revenue, Major Customer [Line Items]
Revenues \| $	$ 22,500
Number Of Customers	1

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 1
-Article 5

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration