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Commitments and Contingencies - Additional Information (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 0 Months Ended
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Jan. 31, 2015 | Feb. 01, 2014 | Feb. 02, 2013 | Mar. 09, 2015
Operating Leases |  |  |  |
Company received tenant allowances | $ 5,129 us-gaap_PaymentsForProceedsFromTenantAllowance | $ 200 us-gaap_PaymentsForProceedsFromTenantAllowance | $ 200 us-gaap_PaymentsForProceedsFromTenantAllowance |
Company expects to receive in tenant allowances under leases during 2015 | 11,047 spwh_TenantAllowancesExpectToBeReceived |  |  |
Lease Expiration Date | 2028-03 |  |  |
Rent expense | 30,520 us-gaap_LeaseAndRentalExpense | 27,118 us-gaap_LeaseAndRentalExpense | 18,639 us-gaap_LeaseAndRentalExpense |
Loss contingency trial start date | Mar. 02, 2015 |  |  |
Loss contingency trial end date | Mar. 06, 2015 |  |  |
Litigation Settlement, Expense | 4,000 us-gaap_LitigationReserve |  |  |
Treasury yield, percentage | 0.22%spwh_TreasuryYield |  |  |
Subsequent Event |  |  |  |
Operating Leases |  |  |  |
Trail award against defendants to the action |  |  |  | $ 11,887 us-gaap_LossContingencyDamagesAwardedValue / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Minimum |  |  |  |
Operating Leases |  |  |  |
Renewal options | 3 years |  |  |
Maximum |  |  |  |
Operating Leases |  |  |  |
Renewal options | 5 years |  |  |

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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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- Definition Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Net cash outflow or inflow from monetary allowance granted by the landlord to a tenant to entice tenant to move into landlords building which will enable the tenant to prepare the leased premises for tenants occupancy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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