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Contingent Liabilities and Commitments - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jul. 31, 2016 | Jul. 31, 2015
Loss Contingencies [Line Items] |  |
Standby Repurchase Obligations Amount | $ 1,898,307 | $ 1,363,576
Term of Commitments | Up to eighteen months |
Repurchase and guarantee reserve balances | $ 6,068 | $ 4,163

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- Definition Repurchase and guarantee reserve balances. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Standby repurchase obligations on dealer inventory financing. + References No definition available. + Details
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Namespace Prefix: | tho_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Terms of commitments under repurchase agreements for the repurchase of products sold to dealers. + References No definition available. + Details
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Namespace Prefix: | tho_
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- 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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