XML 57 R42.htm IDEA: XBRL DOCUMENT  v2.3.0.11

Summary Of Significant Accounting Policies (Summary Of Allowance For Doubtful Accounts Activity) (Details) (USD $) In Thousands	12 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009
Summary Of Significant Accounting Policies
Beginning Balance	$ 422	$ 302	$ 295
Net charged to expense	3	195	326
Write-offs net of recoveries/payments	(116)	(75)	(319)
Heartland acquisition	240
Ending Balance	$ 549	$ 422	$ 302

X

- Definition

Allowance for doubtful accounts, provision charged to expense.

+ Details

Name:	tho_AllowanceForDoubtfulAccountsProvisionChargedToExpense
Namespace Prefix:	tho
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Allowance for doubtful accounts receivable acquisition.

+ Details

Name:	tho_AllowanceForDoubtfulAccountsReceivableAcquisition
Namespace Prefix:	tho
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Allowance for doubtful accounts, write offs against payments and recoveries.

+ Details

Name:	tho_AllowanceForDoubtfulAccountsWriteOffsAgainstPaymentsAndRecoveries
Namespace Prefix:	tho
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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

X

- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 4
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5074-111524

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant