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Subsequent Event - Additional Information (Detail) (Subsequent Event, Asset Purchase Agreement, USD $) In Thousands, unless otherwise specified | Sep. 17, 2012
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Subsequent Event | Asset Purchase Agreement |
Subsequent Event [Line Items] |
Acquisition of Krystal's bus operation assets for cash consideration | $ 3,900

X
- Definition Amount of expected cash payments resulting from acquisition. + References No definition available. + Details
Name: | tho_AmountOfExpectedCashPaymentsResultingFromAcquisition
Namespace Prefix: | tho_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration