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Nature Of Operations And Accounting Policies (Details)	1 Months Ended
	Sep. 30, 2011
Nature Of Operations And Accounting Policies [Abstract]
Percentage used to determine whether it is more likely than not that a reporting unit's fair value is less than its carrying amount	50.00%

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- Definition

Percentage used to determine whether it is more likely than not that a reporting unitS fair value is less than its carrying amount.

+ Details

Name:	tho_PercentageUsedToDetermineWhetherItIsMoreLikelyThanNotThatReportingUnitSFairValueIsLessThanItsCarryingAmount
Namespace Prefix:	tho
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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- Details

Name:	us-gaap_AccountingPoliciesAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration