Name:	hayn_DefinedContributionPlanAnnualContributionPerEmployeePercentageLimitExceptForSalariedAndCertainHourlyEmployees
Namespace Prefix:	hayn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the percentage of employee's contribution contributed by the entity under the defined contribution plan for substantially all U.S. employees except for all salaried employees and certain hourly employees (hired after June 30, 2007 that are not eligible for the U.S. pension plan).

No definition available.

Name:	hayn_DefinedContributionPlanEmployerContributionPercentageExceptForSalariedAndCertainHourlyEmployees
Namespace Prefix:	hayn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the percentage of employee's contribution contributed by the entity under the defined contribution plan for all salaried employees and certain hourly employees (hired after June 30, 2007 that are not eligible for the U.S. pension plan).

No definition available.

Name:	hayn_DefinedContributionPlanEmployerContributionPercentageForSalariedAndCertainHourlyEmployees
Namespace Prefix:	hayn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the limit (expressed as a percentage) of employee's salary contributed by the entity under the defined contribution plan for all salaried employees and certain hourly employees (hired after June 30, 2007 that are not eligible for the U.S. pension plan).

No definition available.

Name:	hayn_DefinedContributionPlanMaximumAnnualContributionPerEmployeePercentageLimitForSalariedAndCertainHourlyEmployees
Namespace Prefix:	hayn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	hayn_DefinedContributionPlansLineItems
Namespace Prefix:	hayn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The amount of the cost recognized during the period for defined contribution plans.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 11

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.