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Initial Public Offering - Additional Information (Details) (Initial Public Offering, USD $) In Thousands, except Per Share data, unless otherwise specified | 0 Months Ended
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May 16, 2014 | Apr. 23, 2014
Subsidiary Or Equity Method Investee [Line Items] |  |
Initial public offering common stock, shares issued | 1,400 us-gaap_StockIssuedDuringPeriodSharesNewIssues | 8,333 us-gaap_StockIssuedDuringPeriodSharesNewIssues
Initial public offering common stock to public, price per share | $ 9.50 us-gaap_SharesIssuedPricePerShare | $ 9.50 us-gaap_SharesIssuedPricePerShare
Proceeds from issuance initial public offering, net |  | $ 70,299 us-gaap_ProceedsFromIssuanceInitialPublicOffering
Payment of underwriting discounts and commissions |  | 5,542 us-gaap_PaymentsForUnderwritingExpense
Other offering expenses |  | 3,326 us-gaap_PaymentsOfStockIssuanceCosts
Issuance of common stock, net | $ 3,100 us-gaap_ProceedsFromIssuanceOfCommonStock |
Parent Company |  |
Subsidiary Or Equity Method Investee [Line Items] |  |
Initial public offering common stock, shares issued | 350 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember |
Seidler Equity Partners III L.P. |  |
Subsidiary Or Equity Method Investee [Line Items] |  |
Initial public offering common stock, shares issued | 1,050 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = spwh_SeidlerEquityPartnersIIILPMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember | 4,167 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = spwh_SeidlerEquityPartnersIIILPMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember

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- Definition Cash paid for expenses incurred during underwriting activities (the process to review insurance applications, evaluate risks, accept or reject applications, and determine the premiums to be charged) for insurance companies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The cash outflow for cost incurred directly with the issuance of an equity security. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash inflow associated with the amount received from entity's first offering of stock to the public. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition Amount per share or per unit of equity securities issued by non-development stage entity. + References No definition available. + Details
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- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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- Details
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