Credit Facilities, Short-term Borrowings (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended					3 Months Ended	6 Months Ended			6 Months Ended				6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2014 Foreign Lines of Credit And Overdraft Facilities [Member]	Dec. 31, 2013 Domestic Line Of Credit [Member]	Mar. 31, 2014 Domestic Line Of Credit [Member]	Mar. 31, 2014 Revolving Credit Facility [Member]	Sep. 30, 2013 Revolving Credit Facility [Member]	Mar. 31, 2014 Revolving Credit Facility [Member] Minimum [Member]	Mar. 31, 2014 Revolving Credit Facility [Member] Maximum [Member]	Mar. 31, 2014 Revolving Credit Agreement [Member]	Mar. 31, 2014 Chinese Credit Facility [Member]	Mar. 31, 2014 Chinese Credit Facility, RMB Denominated Loan [Member]	Mar. 31, 2014	Mar. 31, 2014 The Notes [Member]	Mar. 31, 2014 Revolving Credit Agreement [Member]
Maximum borrowing capacity						$ 200,000							$ 22,700				$ 600,000
Option to increase maximum borrowings to this amount																	800,000
Line of Credit Facility, Expiration Date						Dec. 20, 2013						Jul. 01, 2018
Line of Credit Facility, Initiation Date						Dec. 21, 2012
Variable Rate Basis							prime rate or an adjusted LIBOR			0.85%	1.65%	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%
Credit facility effective interest rate on outstanding borrowing								1.20%
Cross default provisions related to the Company’s other outstanding debt arrangements in excess of this amount, the occurrence of which would permit the lenders to accelerate the amounts due thereunder												60,000
Debt Covenant, Minimum Consolidated Net Worth Calculation, Base Value												800,000				800,000
Debt Covenant, Minimum Consolidated Net Worth Calculation, Percentage of Net Income												50.00%				50.00%
Debt Covenant, Minimum Consolidated Net Worth Calculation, Percentage of Net Proceeds of Issuance of Capital Stock												50.00%
Debt Covenant, Leverage Ratio, Maximum												3.5 to 1.0				3.5 to 1.0
Debt Covenant, Leverage Ratio During Material Acquisition Period, Maximum												4.0 to 1.0				4.0 to 1.0
Debt Covenant, Leverage Ratio Next Two Succeeding Fiscal Quarters Following Material Acquisition, Maximum												3.75 to 1.0
Repayment of long-term debt	300,000	41,875
Outstanding borrowings					0			105,000	0				0
Short-term borrowings	21,000		0									21,000
Long-term debt, excluding current portion	584,000		450,000					84,000
Cash and Cash Equivalents, at Carrying Value	56,665	54,658	48,556	61,829
Cash and cash equivalents	$ 56,665	$ 54,658	$ 48,556	$ 61,829