Retirement Benefits (Schedule of Changes in Plan Assets and Benefit Obligations Recorded in Other Comprehensive (Income) Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Net (gain) loss arising during the period	$ 26,866	$ (3,746)	$ (26,756)
Prior service (benefit) cost	0	3,355	0
Loss (gain) due to settlement or curtailment arising during the period	0	7,539	(36)
Amortization of: Net gains (losses)	(513)	(785)	(1,770)
Amortization of: Prior service benefit (cost)	(225)	66	90
Foreign currency exchange rate changes	(867)	(104)	$ (673)
Pension Plans, Defined Benefit [Member]
Net (gain) loss arising during the period	20,161	(4,891)
Prior service (benefit) cost	0	3,355
Loss (gain) due to settlement or curtailment arising during the period	0	7,539
Amortization of: Net gains (losses)	(586)	(985)
Amortization of: Prior service benefit (cost)	(383)	(93)
Foreign currency exchange rate changes	(865)	(107)
Total recorded in accumulated other comprehensive loss (income)	18,327	4,818
United States Pension Plans of US Entity, Defined Benefit [Member]
Net (gain) loss arising during the period	17,390	(4,269)
Prior service (benefit) cost	0	3,355
Loss (gain) due to settlement or curtailment arising during the period	0	6,624
Amortization of: Net gains (losses)	(396)	(330)
Amortization of: Prior service benefit (cost)	(383)	(97)
Foreign currency exchange rate changes	0	0
Total recorded in accumulated other comprehensive loss (income)	16,611	5,283
Foreign Pension Plans, Defined Benefit [Member]
Net (gain) loss arising during the period	2,771	(622)
Prior service (benefit) cost	0	0
Loss (gain) due to settlement or curtailment arising during the period	0	915
Amortization of: Net gains (losses)	(190)	(655)
Amortization of: Prior service benefit (cost)	0	4
Foreign currency exchange rate changes	(865)	(107)
Total recorded in accumulated other comprehensive loss (income)	1,716	(465)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Net (gain) loss arising during the period	6,705	1,145
Amortization of: Net gains (losses)	73	200
Amortization of: Prior service benefit (cost)	158	159
Foreign currency exchange rate changes	(2)	3
Total recorded in accumulated other comprehensive loss (income)	$ 6,934	$ 1,507