Retirement Benefits (Schedule of Amounts Recognized in Balance Sheet and Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Pension Plans, Defined Benefit [Member]
Amounts recognized in statement of financial position consist of:
Other non-current assets	$ 694	$ 5,634
Other non-current liabilities	(12,542)	(1,748)
Net over/(under)funded status at end of year	(11,848)	3,886
Amounts recognized in accumulated other comprehensive loss (income) consist of:
Unrecognized net prior service (benefit) cost	4,241	4,624
Unrecognized net (gains) losses	40,479	21,769
Total amounts recognized	44,720	26,393
Deferred taxes	(16,707)	(9,658)
Amounts recognized in accumulated other comprehensive loss (income)	28,013	16,735
United States Pension Plans of US Entity, Defined Benefit [Member]
Amounts recognized in statement of financial position consist of:
Other non-current assets	0	5,634
Other non-current liabilities	(10,280)	(1,284)
Net over/(under)funded status at end of year	(10,280)	4,350
Amounts recognized in accumulated other comprehensive loss (income) consist of:
Unrecognized net prior service (benefit) cost	4,241	4,624
Unrecognized net (gains) losses	26,861	9,867
Total amounts recognized	31,102	14,491
Deferred taxes	(11,890)	(5,527)
Amounts recognized in accumulated other comprehensive loss (income)	19,212	8,964
Foreign Pension Plans, Defined Benefit [Member]
Amounts recognized in statement of financial position consist of:
Other non-current assets	694	0
Other non-current liabilities	(2,262)	(464)
Net over/(under)funded status at end of year	(1,568)	(464)
Amounts recognized in accumulated other comprehensive loss (income) consist of:
Unrecognized net prior service (benefit) cost	0	0
Unrecognized net (gains) losses	13,618	11,902
Total amounts recognized	13,618	11,902
Deferred taxes	(4,817)	(4,131)
Amounts recognized in accumulated other comprehensive loss (income)	8,801	7,771
Other Postretirement Benefit Plans, Defined Benefit [Member]
Amounts recognized in statement of financial position consist of:
Accrued liabilities	(2,481)	(2,262)
Other non-current liabilities	(32,446)	(26,963)
Net over/(under)funded status at end of year	(34,927)	(29,225)
Amounts recognized in accumulated other comprehensive loss (income) consist of:
Unrecognized net prior service (benefit) cost	(477)	(635)
Unrecognized net (gains) losses	3,745	(3,031)
Total amounts recognized	3,268	(3,666)
Deferred taxes	(1,267)	1,388
Amounts recognized in accumulated other comprehensive loss (income)	$ 2,001	$ (2,278)