Credit Facilities, Short-term Borrowings (Narrative) (Details) In Thousands, unless otherwise specified		6 Months Ended		6 Months Ended				6 Months Ended
	Mar. 31, 2015 Foreign Lines of Credit And Overdraft Facilities [Member] USD ($)	Mar. 31, 2015 Revolving Credit Agreement [Member] USD ($)	Sep. 30, 2014 Revolving Credit Agreement [Member] USD ($)	Mar. 31, 2015 Revolving Credit Agreement [Member] Minimum [Member]	Mar. 31, 2015 Revolving Credit Agreement [Member] Maximum [Member]	Mar. 31, 2015 Chinese Credit Facility [Member] USD ($)	Sep. 30, 2014 Chinese Credit Facility [Member] USD ($)	Mar. 31, 2015 Chinese Credit Facility, RMB Denominated Loan [Member]	Mar. 31, 2015 Chinese Credit Facility, USD Denominated Loan [Member]	Mar. 31, 2015 Brazil Credit Facility BRL Denominated Loan [Member] USD ($)	Mar. 31, 2015 Brazil Credit Facility BRL Denominated Loan [Member] BRL
Maximum borrowing capacity		$ 600,000				$ 22,700	$ 22,700				26,000
Option to increase maximum borrowings to this amount		800,000
Line of Credit Facility, Expiration Date		Jul. 01, 2018
Variable Rate Basis		LIBOR						interest at the prevailing interest rate offered by the People's Bank of China on the date of borrowing, plus a margin equal to 25% of that prevailing rate	interest at the lender's cost of borrowing rate at the date of borrowing, plus 3%	interest at the lender's cost of borrowing rate at the date of borrowing, plus 1.75%	interest at the lender's cost of borrowing rate at the date of borrowing, plus 1.75%
Basis Spread On Variable Rate				0.85%	1.65%
Credit facility effective interest rate on outstanding borrowing		1.23%	1.21%
Outstanding borrowings	$ 0	$ 213,000	$ 210,000			$ 0				$ 0