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Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Net sales	$ 710,872	$ 641,510
Gross profit	426,535	372,806
Operating income	142,202	117,028
Outdoor [Member]
Net sales	144,258	115,875
Gross profit	93,285	73,469
Operating income	43,822	34,451
Fitness [Member]
Net sales	166,035	137,831
Gross profit	96,601	77,741
Operating income	33,374	18,472
Marine [Member]
Net sales	113,554	104,445
Gross profit	66,683	59,747
Operating income	13,131	18,145
Auto [Member]
Net sales	141,312	160,488
Gross profit	61,012	70,616
Operating income	3,468	7,352
Aviation [Member]
Net sales	145,713	122,871
Gross profit	108,954	91,233
Operating income	$ 48,407	$ 38,608

X

- Definition

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

+ 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 210.5-03.1,2)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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The net result for the period of deducting operating expenses from operating revenues.

+ References

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- Definition

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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