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Summary of Significant Accounting Policies - Disaggregation of revenue from contracts with customers (Details)	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	100.00%	100.00%	100.00%	100.00%
Camping
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	20.40%	20.60%	16.20%	16.90%
Clothing
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	7.30%	7.40%	7.30%	7.30%
Fishing
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	17.00%	16.70%	14.50%	14.20%
Footwear
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	7.60%	7.50%	7.00%	7.30%
Hunting and Shooting
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	39.70%	40.30%	47.40%	46.40%
Optics, Electronics, Accessories, and Other
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	8.00%	7.50%	7.60%	7.90%

X

- Definition

Percentage of revenue from contract with customers net of excise and sales taxes.

+ References

No definition available.

+ Details

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Namespace Prefix:	spwh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_ProductOrServiceAxis=spwh_CampingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=spwh_ClothingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=spwh_FishingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=spwh_FootwearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=spwh_HuntingAndShootingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=spwh_OpticsElectronicsAccessoriesAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: