Retirement Benefits (Schedule of Net Periodic Benefit Costs) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Pension Plans, Defined Benefit [Member]
Service cost	$ 5,660	$ 4,666	$ 4,425
Interest cost	7,682	8,096	7,930
Expected return on plan assets	(10,793)	(9,592)	(9,234)
Amortization of: Net (gains) losses	1,839	1,189	1,212
Amortization of: Prior service cost (benefit)	67	66	66
Settlement costs	37	56	0
Net periodic retirement pension (beneift) cost	4,492	4,481	4,399
United States Pension Plans of US Entity, Defined Benefit [Member]
Service cost	4,608	3,530	3,433
Interest cost	5,569	5,816	5,646
Expected return on plan assets	(8,183)	(7,008)	(6,693)
Amortization of: Net (gains) losses	1,374	524	312
Amortization of: Prior service cost (benefit)	75	75	75
Settlement costs	0	0	0
Net periodic retirement pension (beneift) cost	3,443	2,937	2,773
Foreign Pension Plans, Defined Benefit [Member]
Service cost	1,052	1,136	992
Interest cost	2,113	2,280	2,284
Expected return on plan assets	(2,610)	(2,584)	(2,541)
Amortization of: Net (gains) losses	465	665	900
Amortization of: Prior service cost (benefit)	(8)	(9)	(9)
Settlement costs	37	56	0
Net periodic retirement pension (beneift) cost	1,049	1,544	1,626
Other Postretirement Benefit Plans, Defined Benefit [Member]
Service cost	71	70	92
Interest cost	1,244	1,798	1,974
Amortization of: Net (gains) losses	(68)	91	128
Amortization of: Prior service cost (benefit)	(158)	(550)	(871)
Net periodic retirement pension (beneift) cost	$ 1,089	$ 1,409	$ 1,323