Retirement Benefits (Schedule of Amounts Recognized in Balance Sheet and Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Pension Plans, Defined Benefit [Member]
Amounts recognized in statement of financial position consist of:
Other non-current assets	$ 5,634	$ 4,154
Other non-current liabilities	(1,748)	(4,402)
Net over/(under)funded status at end of year	3,886	(248)
Amounts recognized in accumulated other comprehensive loss (income) consist of:
Unrecognized net prior service (benefit) cost	4,624	1,363
Unrecognized net (gains) losses	21,769	20,212
Total amounts recognized	26,393	21,575
Deferred taxes	(9,658)	(7,702)
Amounts recognized in accumulated other comprehensive loss (income)	16,735	13,873
United States Pension Plans of US Entity, Defined Benefit [Member]
Amounts recognized in statement of financial position consist of:
Other non-current assets	5,634	4,154
Other non-current liabilities	(1,284)	(1,168)
Net over/(under)funded status at end of year	4,350	2,986
Amounts recognized in accumulated other comprehensive loss (income) consist of:
Unrecognized net prior service (benefit) cost	4,624	1,367
Unrecognized net (gains) losses	9,867	7,841
Total amounts recognized	14,491	9,208
Deferred taxes	(5,527)	(3,499)
Amounts recognized in accumulated other comprehensive loss (income)	8,964	5,709
Foreign Pension Plans, Defined Benefit [Member]
Amounts recognized in statement of financial position consist of:
Other non-current assets	0	0
Other non-current liabilities	(464)	(3,234)
Net over/(under)funded status at end of year	(464)	(3,234)
Amounts recognized in accumulated other comprehensive loss (income) consist of:
Unrecognized net prior service (benefit) cost	0	(4)
Unrecognized net (gains) losses	11,902	12,371
Total amounts recognized	11,902	12,367
Deferred taxes	(4,131)	(4,203)
Amounts recognized in accumulated other comprehensive loss (income)	7,771	8,164
Other Postretirement Benefit Plans, Defined Benefit [Member]
Amounts recognized in statement of financial position consist of:
Accrued liabilities	(2,262)	(2,231)
Other non-current liabilities	(26,963)	(26,765)
Net over/(under)funded status at end of year	(29,225)	(28,996)
Amounts recognized in accumulated other comprehensive loss (income) consist of:
Unrecognized net prior service (benefit) cost	(635)	(794)
Unrecognized net (gains) losses	(3,031)	(4,379)
Total amounts recognized	(3,666)	(5,173)
Deferred taxes	1,388	1,970
Amounts recognized in accumulated other comprehensive loss (income)	$ (2,278)	$ (3,203)