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

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=49170846&loc=d3e28014-114942

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.