Retirement Benefits (Schedule of Net Perioodic Benefit Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Pension Plans, Defined Benefit [Member]
Service cost	$ 2,802	$ 4,504	$ 5,660
Interest cost	8,084	8,792	7,682
Expected return on plan assets	(13,679)	(12,883)	(10,793)
Amortization of: Net (losses) gains	(586)	(985)	(1,839)
Amortization of: Prior service (benefit) cost	383	93	67
Settlement costs	0	0	37
Curtailment (gain) loss	0	(7,539)	0
Net periodic retirement pension (benefit) cost	(1,824)	(6,048)	4,492
United States Pension Plans of US Entity, Defined Benefit [Member]
Service cost	2,018	3,516	4,608
Interest cost	5,956	6,382	5,569
Expected return on plan assets	(10,647)	(9,813)	(8,183)
Amortization of: Net (losses) gains	(396)	(330)	(1,374)
Amortization of: Prior service (benefit) cost	383	97	75
Settlement costs	0	0	0
Curtailment (gain) loss	0	(6,624)	0
Net periodic retirement pension (benefit) cost	(1,894)	(6,112)	3,443
Foreign Pension Plans, Defined Benefit [Member]
Service cost	784	988	1,052
Interest cost	2,128	2,410	2,113
Expected return on plan assets	(3,032)	(3,070)	(2,610)
Amortization of: Net (losses) gains	(190)	(655)	(465)
Amortization of: Prior service (benefit) cost	0	(4)	(8)
Settlement costs	0	0	37
Curtailment (gain) loss	0	(915)	0
Net periodic retirement pension (benefit) cost	70	64	1,049
Other Postretirement Benefit Plans, Defined Benefit [Member]
Service cost	30	47	71
Interest cost	1,233	1,432	1,244
Amortization of: Net (losses) gains	73	200	68
Amortization of: Prior service (benefit) cost	(158)	(158)	(158)
Net periodic retirement pension (benefit) cost	$ 1,032	$ 1,121	$ 1,089