Segments of Business (Summary of Operations by Business Unit) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jul. 01, 2016	Jul. 03, 2015	Jul. 01, 2016	Jul. 03, 2015	Oct. 02, 2015
Segment Reporting Information [Line Items]
Net sales	$ 139,300	$ 140,883	$ 358,790	$ 344,816
Operating profit (loss)	13,583	16,421	27,821	16,713
Total assets (end of period)	326,161	317,846	326,161	317,846	$ 299,204
Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	(383)	(483)	(1,101)	(936)
Eliminations [Member] \| Marine Electronics [Member]
Segment Reporting Information [Line Items]
Net sales	135	134	305	260
Eliminations [Member] \| Outdoor Equipment [Member]
Segment Reporting Information [Line Items]
Net sales	15	19	30	36
Eliminations [Member] \| Watercraft [Member]
Segment Reporting Information [Line Items]
Net sales	97	102	123	122
Eliminations [Member] \| Diving [Member]
Segment Reporting Information [Line Items]
Net sales	136	228	643	518
Operating Segments [Member] \| Marine Electronics [Member]
Segment Reporting Information [Line Items]
Net sales	87,928	86,064	237,351	218,819
Operating profit (loss)	19,970	14,603	42,948	24,146
Total assets (end of period)	128,299	136,484	128,299	136,484	125,113
Operating Segments [Member] \| Outdoor Equipment [Member]
Segment Reporting Information [Line Items]
Net sales	13,202	15,593	31,117	34,115
Operating profit (loss)	1,168	1,811	1,965	2,536
Total assets (end of period)	31,979	37,159	31,979	37,159	33,663
Operating Segments [Member] \| Watercraft [Member]
Segment Reporting Information [Line Items]
Net sales	19,167	19,428	40,270	38,769
Operating profit (loss)	2,894	2,334	3,190	1,308
Total assets (end of period)	29,589	29,845	29,589	29,845	20,898
Operating Segments [Member] \| Diving [Member]
Segment Reporting Information [Line Items]
Net sales	18,709	19,564	49,554	52,701
Operating profit (loss)	(6,204)	947	(8,782)	242
Total assets (end of period)	73,930	65,416	73,930	65,416	62,589
Operating Segments [Member] \| Other / Corporate [Member]
Segment Reporting Information [Line Items]
Net sales	294	234	498	412
Operating profit (loss)	(4,245)	(3,274)	(11,500)	(11,519)
Total assets (end of period)	$ 62,364	$ 48,942	$ 62,364	$ 48,942	$ 56,941

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

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=63488584&loc=d3e20235-122688

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