Maximum borrowing capacity under the credit facility permitted under the amended agreement at the request of borrowers.

No definition available.

Name:	hayn_LineOfCreditFacilityIncreasedMaximumBorrowingCapacityAtBorrowersRequest
Namespace Prefix:	hayn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the percentage of the equity interest in direct foreign subsidiaries pledged as collateral for borrowings under the line of credit facility arrangement.

+ References

No definition available.

+ Details

Name:	hayn_LineOfCreditFacilityPercentageOfEquityInterestInDirectForeignSubsidiariesPledgedAsCollateral
Namespace Prefix:	hayn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Debt (Details)	12 Months Ended		12 Months Ended						1 Months Ended	12 Months Ended
Debt (Details)	Sep. 30, 2012 U.S. revolving credit facility	Nov. 18, 2008 U.S. revolving credit facility USD ($)	Sep. 30, 2012 U.S. revolving credit facility Prime rate	Sep. 30, 2012 U.S. revolving credit facility Adjusted euro dollar rate	Sep. 30, 2012 U.S. revolving credit facility Maximum Prime rate	Sep. 30, 2012 U.S. revolving credit facility Maximum Adjusted euro dollar rate	Apr. 30, 2008 U.K. revolving credit facility USD ($)	Apr. 30, 2008 U.K. revolving credit facility GBP (£)	Apr. 30, 2008 U.K. revolving credit facility Bank's Sterling rate	Sep. 30, 2012 Letters of credit
Debt
Maximum revolving loan amount under the Amended Agreement		$ 120,000,000					$ 3,233,000	£ 2,000,000
Increased maximum revolving loan amount at the request of the borrowers		$ 170,000,000
Variable rate basis			prime rate	adjusted Eurodollar rate					Bank's Sterling Base Rate
Basis spread on variable rate (as a percent)					0.75%	2.00%			2.00%
Commitment fee (as a percent)	0.25%									1.50%
Percentage of equity interest in direct foreign subsidiaries pledged as collateral for borrowings	65.00%