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v2.4.1.9

Components of Amortizable Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified | 0 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jan. 05, 2015 | May 01, 2014 | Oct. 31, 2013 | Aug. 30, 2013 | Apr. 30, 2015 | Jul. 31, 2014
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Cost |  |  |  |  | $ 181,902 us-gaap_FiniteLivedIntangibleAssetsGross | $ 162,422 us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated Amortization |  |  |  |  | 53,575 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization | 42,639 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Dealer Networks |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Weighted Average Remaining Life in Years | 12 years | 12 years | 12 years | 8 years | 9 years |
Cost |  |  |  |  | 105,060 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = tho_DealerNetworkMember | 90,760 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = tho_DealerNetworkMember
Accumulated Amortization |  |  |  |  | 34,641 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = tho_DealerNetworkMember | 27,102 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = tho_DealerNetworkMember
Non-Compete Agreements |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Weighted Average Remaining Life in Years |  | 5 years |  | 2 years | 2 years |
Cost |  |  |  |  | 4,710 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember | 4,710 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember
Accumulated Amortization |  |  |  |  | 4,019 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember | 3,283 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember
Trademarks |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Weighted Average Remaining Life in Years | 20 years | 20 years | 20 years | 20 years | 20 years |
Cost |  |  |  |  | 49,282 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember | 43,882 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember
Accumulated Amortization |  |  |  |  | 6,973 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember | 5,479 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember
Design Technology And Other Intangibles |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Weighted Average Remaining Life in Years |  |  |  |  | 9 years |
Cost |  |  |  |  | 22,850 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = tho_DesignTechnologyAndOtherIntangiblesMember | 23,070 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = tho_DesignTechnologyAndOtherIntangiblesMember
Accumulated Amortization |  |  |  |  | $ 7,942 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = tho_DesignTechnologyAndOtherIntangiblesMember | $ 6,775 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = tho_DesignTechnologyAndOtherIntangiblesMember

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Useful life of finite-lived intangible assets, 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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