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Subsequent Event - Additional Information (Detail) (USD $) | 12 Months Ended | 0 Months Ended
--- | --- | ---
Jul. 31, 2014 | May 15, 2015 | May 01, 2015
Postle Operating, LLC |  |  |
Subsequent Event [Line Items] |  |  |
Sales | $ 220,000,000 us-gaap_BusinessAcquisitionRevenueReportedByAcquiredEntityForLastAnnualPeriod / us-gaap_BusinessAcquisitionAxis = tho_BusinessAcquisitionFiveMember |  |
Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Common stock purchased, shares |  | 1,000,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Common stock price per share |  | $ 60.00 us-gaap_TreasuryStockAcquiredAverageCostPerShare / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Aggregate purchase price of common stock |  | 60,000,000 us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Closing price of common stock |  | $ 61.29 tho_ClosingPriceOfCommonStock / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Percentage of issued and outstanding common stock prior to repurchase |  | 1.90%tho_PercentageOfIssuedAndOutstandingCommonStockPriorToRepurchase / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Subsequent Event | Postle Operating, LLC |  |  |
Subsequent Event [Line Items] |  |  |
Payment to acquire business |  |  | $ 144,315,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = tho_BusinessAcquisitionFiveMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Asset purchase agreement date |  |  | May 01, 2015

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- Definition Number of shares repurchased as a percentage of issued and outstanding common stock prior to repurchase. + References No definition available. + Details
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- Definition Date when the business acquisition agreement was executed, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Total revenue reported by the acquired entity for its previous full fiscal year before the business acquisition. + References No definition available. + Details
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- Definition The cash outflow to reacquire common stock during the period. + 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 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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