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v2.3.0.11

Employee Benefit Plans (Details) (USD $) In Thousands | 12 Months Ended
--- | ---
Jul. 31, 2011 | Jul. 31, 2010 | Jul. 31, 2009
Employee Benefit Plans |  |  |
Employer match and administrative fees for 401(k) plan | $ 293 | $ 294 | $ 332
Investments under the plan | $ 8,715 | $ 7,499 |

X
- Definition Defined benefit plan employer match and administrative fees. + Details
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Namespace Prefix: | tho
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value of nonqualified deferred compensation plan. + Details
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Namespace Prefix: | tho
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract
Namespace Prefix: | us-gaap
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration