Condensed Consolidating Financial Information (Details)	6 Months Ended
Mar. 31, 2017
Long-term debt
Ownership percentage in guarantor subsidiaries	100.00%
Maximum percentage of ownership interest below which subsidiaries are considered non-guaranteeing	100.00%
7.25% Senior notes, due January 2019
Long-term debt
Interest rate on long-term debt (as a percent)	7.25%

Represents the percentage of ownership held by the entity in guarantor subsidiaries.

No definition available.

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- Definition

Represents the maximum percentage of ownership held by the entity below which subsidiaries are considered non-guaranteeing.

+ References

No definition available.

+ Details

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- Definition

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.

+ References

No definition available.

+ Details

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- Details

Name:	us-gaap_DebtInstrumentAxis=hw_SeniorNotes725PercentDueJanuary2019Member
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