Retirement Benefit Plans - Net Plan Assets Recognized in the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015
Reconciliation of funded status:
Plans in which Benefit Obligations Exceed Assets at September 30,	$ (8,387)	$ (6,789)
Amounts recognized in accumulated other comprehensive loss:
Net loss, Plans in which Benefit Obligations Exceed Assets	10,926	10,003
Net amount recognized in the consolidated balance sheets, Plans in which Benefit Obligations Exceed Assets	2,539	3,214
Amounts recognized in the consolidated balance sheets are:
Plans in which Benefit Obligations Exceed Assets at September 30,	(8,387)	(6,789)
Accumulated other comprehensive loss pretax, Plans in which Benefit Obligations Exceed Assets	10,926	10,003
Accrued liabilities
Reconciliation of funded status:
Plans in which Benefit Obligations Exceed Assets at September 30,	(46)	(46)
Amounts recognized in the consolidated balance sheets are:
Plans in which Benefit Obligations Exceed Assets at September 30,	(46)	(46)
Pension liability
Reconciliation of funded status:
Plans in which Benefit Obligations Exceed Assets at September 30,	(8,341)	(6,743)
Amounts recognized in the consolidated balance sheets are:
Plans in which Benefit Obligations Exceed Assets at September 30,	$ (8,341)	$ (6,743)

Defined benefit plan pension plans with accumulated benefit obligations in excess of plan aggregate benefit obligation accumulated other comprehensive income net gains losses after tax.

No definition available.

+ Details

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- Definition

Defined benefit plans with benefit obligations in excess of plan assets aggregate benefit obligation accumulated other comprehensive income before tax.

+ References

No definition available.

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- Definition

The aggregate net amount recognized in the balance sheet associated with the defined benefit plan(s). Will normally be the same as the Defined Benefit Plan, Funded Status of Plan, Total.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64852052&loc=d3e1703-114919

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- Definition

If aggregate disclosures are presented, the aggregate benefit obligation for plans with benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2417-114920

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