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Summary of Disaggregates Net Sales into Major Merchandise Categories to Depict Nature and Amount of Revenue and Related Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Accounting Policies [Line Items]
Net sales	$ 239,951	$ 243,671	$ 474,129	$ 496,275
ASC 606 [Member] | ASU No. 2014-09 [Member]
Accounting Policies [Line Items]
Net sales	239,951	243,671	474,129	496,275
ASC 606 [Member] | ASU No. 2014-09 [Member] | Hard goods [Member]
Accounting Policies [Line Items]
Net sales	129,013	132,958	233,464	243,712
ASC 606 [Member] | ASU No. 2014-09 [Member] | Athletic and sport apparel [Member]
Accounting Policies [Line Items]
Net sales	42,590	41,949	101,036	107,078
ASC 606 [Member] | ASU No. 2014-09 [Member] | Athletic and sport footwear [Member]
Accounting Policies [Line Items]
Net sales	67,199	67,803	136,552	141,971
ASC 606 [Member] | ASU No. 2014-09 [Member] | Other sales [Member]
Accounting Policies [Line Items]
Net sales	$ 1,149	$ 961	$ 3,077	$ 3,514

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- Definition

Accounting policies.

+ References

No definition available.

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- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and 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(a))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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