Credit Facilities, Short-term Borrowings (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2012
Repayment of long-term debt	$ 300,000	$ 1,875
Short-term borrowings	10,000		0
Long-term debt, excluding current portion	584,000		450,000
Cash and Cash Equivalents, at Carrying Value	54,590	69,456	48,556	61,829
Cash and cash equivalents	54,590	69,456	48,556	61,829
Foreign Lines of Credit And Overdraft Facilities [Member]
Outstanding borrowings	0
Domestic Line Of Credit [Member]
Maximum borrowing capacity	200,000
Line of Credit Facility, Expiration Date	Dec. 20, 2013
Line of Credit Facility, Initiation Date	Dec. 21, 2012
Variable Rate Basis	prime rate or an adjusted LIBOR
Revolving Credit Facility [Member] | Minimum [Member]
Basis Spread On Variable Rate	0.85%
Revolving Credit Facility [Member] | Maximum [Member]
Basis Spread On Variable Rate	1.65%
Revolving Credit Agreement [Member]
Maximum borrowing capacity	600,000
Option to increase maximum borrowings to this amount	800,000
Line of Credit Facility, Expiration Date	Jul. 01, 2018
Variable Rate Basis	LIBOR
Credit facility effective interest rate on outstanding borrowing	1.26%
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
Debt Covenant, Minimum Consolidated Net Worth Calculation, Percentage of Net Income	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
Debt Covenant, Leverage Ratio During Material Acquisition Period, Maximum	4.0 to 1.0
Debt Covenant, Leverage Ratio Next Two Succeeding Fiscal Quarters Following Material Acquisition, Maximum	3.75 to 1.0
Outstanding borrowings	94,000		0
Short-term borrowings	10,000
Long-term debt, excluding current portion	84,000
Revolving Credit Agreement [Member] | Minimum [Member]
Basis Spread On Variable Rate	0.85%
Revolving Credit Agreement [Member] | Maximum [Member]
Basis Spread On Variable Rate	1.65%
Chinese Credit Facility [Member]
Maximum borrowing capacity	22,700
Outstanding borrowings	0
Chinese Credit Facility, RMB Denominated Loan [Member]
Variable Rate Basis	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
Chinese Credit Facility, USD Denominated Loan [Member]
Variable Rate Basis	interest at the lender's cost of borrowing rate at the date of borrowing, plus 3%
The Notes [Member]
Debt Covenant, Minimum Consolidated Net Worth Calculation, Base Value	$ 800,000
Debt Covenant, Minimum Consolidated Net Worth Calculation, Percentage of Net Income	50.00%
Debt Covenant, Leverage Ratio, Maximum	3.5 to 1.0
Debt Covenant, Leverage Ratio During Material Acquisition Period, Maximum	4.0 to 1.0