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Summary of Significant Accounting Policies - Disaggregation of revenue from contracts with customers (Details)	12 Months Ended
	Feb. 02, 2019	Feb. 03, 2018	Jan. 28, 2017
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	100.00%	100.00%	100.00%
Camping
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	14.20%	15.10%	14.60%
Clothing
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	8.90%	9.30%	8.70%
Fishing
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	10.60%	10.70%	10.00%
Footwear
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	7.30%	7.40%	7.10%
Hunting and Shooting
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	48.30%	48.70%	50.90%
Optics, Electronics, Accessories, and Other
Disaggregation of revenue from contracts with customers
Net sales (as a percent)	10.60%	8.80%	8.70%

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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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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: