Related Party Transactions (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Director
Transactions with related parties
Commissions paid related party by providers of insurance services	$ 0.1	$ 0.1	$ 0.1
Immediate Family Member of Management or Principal Owner
Transactions with related parties
Cost incurred for transportation facility provided by related party	$ 1.4	$ 6.4	$ 5.8

Represents commissions paid to a related party by third party entities that provide insurance services to the reporting entity.

No definition available.

Name:	hw_CommissionsPaidRelatedPartyByProvidersOfInsuranceServices
Namespace Prefix:	hw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration