Benefit Plans (Plan Assets) (Details) (USD $) In Thousands, unless otherwise specified				12 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2013 Equities [Member]	Sep. 30, 2012 Equities [Member]	Sep. 30, 2013 Corporate Bonds [Member]	Sep. 30, 2012 Corporate Bonds [Member]	Sep. 30, 2013 UK Government Bonds [Member]	Sep. 30, 2012 UK Government Bonds [Member]	Sep. 30, 2013 Cash [Member]	Sep. 30, 2012 Cash [Member]	Sep. 30, 2013 Other Plan Assets [Member]	Sep. 30, 2012 Other Plan Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 5,242	$ 5,329	$ 4,760	$ 2,062	$ 1,793	$ 979	$ 1,275		$ 485	$ 82	$ 218	$ 2,119	$ 1,558
Actual Plan Asset Allocations	100.00%	100.00%		39.00%	34.00%	19.00%	24.00%	0.00%	9.00%	2.00%	4.00%	40.00%	29.00%
Fair Value Measurement Level				2	2	2	2	2	2	1	1	2	2

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Section 35

-Paragraph 50

-URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930

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- Definition

This element represents the information provided by management related to the valuation inputs used to develop the fair value measurements of plan assets as of the date of the statement of financial position.

+ References

+ Details

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

+ Details

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