Retirement Benefits (Schedule of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Pension Plans, Defined Benefit [Member]
Service cost	$ 611	$ 614	$ 1,827	$ 2,083
Interest cost	1,744	1,722	5,215	5,194
Expected return on plan assets	(3,288)	(3,207)	(9,832)	(9,647)
Amortization of: Net (gains) losses	594	385	1,774	1,159
Amortization of: Prior service (benefit) cost	95	96	287	288
Net periodic retirement (benefit) cost	(244)	(390)	(729)	(923)
Contributions paid - pensions	99	212	565	740
United States Pension Plans of US Entity, Defined Benefit [Member]
Service cost	419	424	1,256	1,522
Interest cost	1,439	1,309	4,318	3,935
Expected return on plan assets	(2,632)	(2,535)	(7,897)	(7,612)
Amortization of: Net (gains) losses	464	323	1,391	969
Amortization of: Prior service (benefit) cost	95	96	287	288
Net periodic retirement (benefit) cost	(215)	(383)	(645)	(898)
Contributions paid - pensions	0	84	0	84
Foreign Pension Plans, Defined Benefit [Member]
Service cost	192	190	571	561
Interest cost	305	413	897	1,259
Expected return on plan assets	(656)	(672)	(1,935)	(2,035)
Amortization of: Net (gains) losses	130	62	383	190
Amortization of: Prior service (benefit) cost	0	0	0	0
Net periodic retirement (benefit) cost	(29)	(7)	(84)	(25)
Contributions paid - pensions	99	128	565	656
Other Postretirement Benefit Plans, Defined Benefit [Member]
Service cost	4	5	11	16
Interest cost	311	263	933	787
Amortization of: Net (gains) losses	50	39	151	117
Amortization of: Prior service (benefit) cost	(40)	(40)	(119)	(119)
Net periodic retirement (benefit) cost	325	267	976	801
Contributions paid - other postretirement plans	$ 592	$ 588	$ 2,011	$ 1,809