Retirement Benefits (Schedule of Net Periodic Benefit Costs) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Pension Plans, Defined Benefit [Member]
Service cost	$ 4,504	$ 5,660	$ 4,666
Interest cost	8,792	7,682	8,096
Expected return on plan assets	(12,883)	(10,793)	(9,592)
Amortization of: Net (gains) losses	985	1,839	1,189
Amortization of: Prior service (benefit) cost	93	67	66
Settlement costs	0	37	56
Curtailment (gain) loss	(7,539)	0	0
Net periodic benefit cost	(6,048)	4,492	4,481
United States Pension Plans of US Entity, Defined Benefit [Member]
Service cost	3,516	4,608	3,530
Interest cost	6,382	5,569	5,816
Expected return on plan assets	(9,813)	(8,183)	(7,008)
Amortization of: Net (gains) losses	330	1,374	524
Amortization of: Prior service (benefit) cost	97	75	75
Settlement costs	0	0	0
Curtailment (gain) loss	(6,624)	0	0
Net periodic benefit cost	(6,112)	3,443	2,937
Foreign Pension Plans, Defined Benefit [Member]
Service cost	988	1,052	1,136
Interest cost	2,410	2,113	2,280
Expected return on plan assets	(3,070)	(2,610)	(2,584)
Amortization of: Net (gains) losses	655	465	665
Amortization of: Prior service (benefit) cost	(4)	(8)	(9)
Settlement costs	0	37	56
Curtailment (gain) loss	(915)	0	0
Net periodic benefit cost	64	1,049	1,544
Other Postretirement Benefit Plans, Defined Benefit [Member]
Service cost	47	71	70
Interest cost	1,432	1,244	1,798
Amortization of: Net (gains) losses	(200)	(68)	91
Amortization of: Prior service (benefit) cost	(158)	(158)	(550)
Net periodic benefit cost	$ 1,121	$ 1,089	$ 1,409