Tabular disclosure of the combined aggregate amount of maturities for all long-term obligations related to environmental post-closure monitoring and maintenance activities.

No definition available.

Name:	hayn_ScheduleOfMaturitiesOfLongTermObligationsPostClosureMonitoringAndMaintenanceActivitiesTableTextBlock
Namespace Prefix:	hayn_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration