Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Section 50
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Summary Of Significant Accounting Policies (Schedule Of Goodwill) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jul. 01, 2016	Sep. 30, 2016	Oct. 02, 2015	Oct. 03, 2014
Goodwill [Line Items]
Goodwill, balance at beginning of period		$ 14,292	$ 14,416
Acquisitions		3,046
Impairment		(6,197)	0
Amount attributable to movements in foreign currency rates		55	(124)
Goodwill, Balance at end of period		11,196	14,292
Gross Goodwill		63,783	60,682	$ 60,806
Accumulated Impairment		(52,587)	(46,390)	$ (46,390)
Marine Electronics [Member]
Goodwill [Line Items]
Goodwill, balance at beginning of period		10,367	10,367
Acquisitions		827
Impairment
Amount attributable to movements in foreign currency rates		2
Goodwill, Balance at end of period		11,196	10,367
Diving [Member]
Goodwill [Line Items]
Goodwill, balance at beginning of period		3,925	4,049
Acquisitions		2,219
Impairment	$ (6,197)	(6,197)
Amount attributable to movements in foreign currency rates		53	(124)
Goodwill, Balance at end of period	$ 0		3,925
Outdoor Equipment [Member]
Goodwill [Line Items]
Goodwill, balance at beginning of period			$ 0