Retirement Benefits (Schedule of Net Perioodic Benefit Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Pension Plans, Defined Benefit [Member]
Service cost	$ 700	$ 1,134	$ 1,406	$ 2,265
Interest cost	2,011	2,208	4,054	4,413
Expected return on plan assets	(3,407)	(3,203)	(6,855)	(6,394)
Amortization of: Net actuarial (gain) loss	145	245	293	489
Amortization of: Prior service (benefit) cost	96	17	192	35
Net periodic retirement pension (beneift) cost	(455)	401	(910)	808
Contributions paid	121	796	1,222	2,467
United States Pension Plans of US Entity, Defined Benefit [Member]
Service cost	505	872	1,009	1,744
Interest cost	1,489	1,603	2,986	3,213
Expected return on plan assets	(2,662)	(2,433)	(5,332)	(4,867)
Amortization of: Net actuarial (gain) loss	99	82	198	165
Amortization of: Prior service (benefit) cost	96	18	192	37
Net periodic retirement pension (beneift) cost	(473)	142	(947)	292
Contributions paid	0	200	0	300
Foreign Pension Plans, Defined Benefit [Member]
Service cost	195	262	397	521
Interest cost	522	605	1,068	1,200
Expected return on plan assets	(745)	(770)	(1,523)	(1,527)
Amortization of: Net actuarial (gain) loss	46	163	95	324
Amortization of: Prior service (benefit) cost	0	(1)	0	(2)
Net periodic retirement pension (beneift) cost	18	259	37	516
Contributions paid	121	596	1,222	2,167
Other Postretirement Benefit Plans, Defined Benefit [Member]
Service cost	8	12	15	24
Interest cost	309	358	617	716
Amortization of: Net actuarial (gain) loss	(18)	(50)	(36)	(100)
Amortization of: Prior service (benefit) cost	(39)	(39)	(79)	(79)
Net periodic retirement pension (beneift) cost	260	281	517	561
Contributions paid	$ 575	$ 862	$ 901	$ 1,368

Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Gain or Loss

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 715

-SubTopic 60

-Glossary Gain or Loss

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The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation.

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An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

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

-Publisher FASB

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-SubTopic 30

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-URI http://asc.fasb.org/extlink&oid=6512136

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

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The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-Paragraph 1

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

-Publisher FASB

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-Glossary Service Cost (Component of Net Periodic Pension Cost)

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The amount of cash or cash equivalents contributed during the reporting period by the entity to fund non-pension postretirement benefits.

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The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

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