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Long-term Debt (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended |  | 6 Months Ended |  | 3 Months Ended | 6 Months Ended |  |  | 6 Months Ended |  | 6 Months Ended |
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Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2014 The Notes [Member] | Mar. 31, 2014 Non Floating Rate Notes [Member] | Mar. 31, 2014 2008 Note Purchase Agreement [Member] | Mar. 31, 2014 2009 Note Purchase Agreement [Member] | Mar. 31, 2014 2013 Note Purchase Agreement [Member] | Mar. 31, 2014 Floating Rate Notes [Member] | Mar. 31, 2014 Series J Notes [Member] | Mar. 31, 2014 First Closing Notes [Member] | Mar. 31, 2014 Second Closing Notes [Member] | 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 Chinese Credit Facility [Member] | Mar. 31, 2014 Chinese Credit Facility, RMB Denominated Loan [Member] | Mar. 31, 2014 | Mar. 31, 2014 Revolving Credit Agreement [Member] | Mar. 31, 2014 Revolving Credit Agreement [Member]
Issuance Date |  |  |  |  | Oct. 01, 2008 | Apr. 01, 2009 | Oct. 01, 2013 |  |  | Oct. 01, 2013 | Nov. 15, 2013 |  |  |  |  |  |  |  |  |  |  |  |
Face Amount |  |  |  |  |  |  | $ 250,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Rate Basis |  |  |  |  |  |  |  |  |  |  |  |  |  | prime rate or an adjusted LIBOR |  |  | 0.85% | 1.65% |  | 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% | LIBOR |
Effective Interest Rate on Note |  |  |  |  |  |  |  |  | 1.49% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Covenant, Leverage Ratio, Maximum |  |  | 3.5 to 1.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.5 to 1.0 |
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, Calculations, Period Of Time |  |  | rolling four quarter basis |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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, Leverage Ratio During Material Acquisition Period, Maximum |  |  | 4.0 to 1.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.0 to 1.0 |
Debt Covenant, Maximum Percentage of Priority Debt To Consolidated Net Worth |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment, Maximum Percentage of Principal |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment, Partial Payment Minimum |  |  | 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment, Make-Whole Amount Computation, Discount Rate Basis Points |  |  |  | 50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Prepayment Make Whole Amount Computation |  |  |  | discounting the remaining scheduled payments of interest and principal of the Notes being prepaid at a discount rate equal to the sum of 50 basis points and the yield to maturity of U.S. Treasury securities having a maturity equal to the remaining average life of the Notes being prepaid. |  |  |  | computed as a percentage of the principal amount of such floating rate Notes equal to (a) 2%, on or prior to November 15, 2014, (b) 1%, after November 15, 2014 and on or prior to November 15, 2015, and (c) 0% after November 15, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt financing costs | 1,297 | 0 |  |  |  |  | 1,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Initiation Date |  |  |  |  |  |  |  |  |  |  |  |  | Dec. 21, 2012 |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Expiration Date |  |  |  |  |  |  |  |  |  |  |  |  | Dec. 20, 2013 |  |  |  |  |  |  |  |  | Jul. 01, 2018 |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  | 22,700 |  |  |  | 600,000
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  | $ 105,000 | $ 0 |  |  | $ 0 |  |  |  |
Credit facility effective interest rate on outstanding borrowing |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.20% |  |  |  |  |  |  |  |

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- Definition The Company may not permit the aggregate amount of priority debt to at any time exceed this percentage of its consolidated net worth at the end of the then most recently ended fiscal quarter to remain in compliance with this debt covenant. Priority debt generally refers to certain unsecured debt of the Company's subsidiaries and all debt of the Company and its subsidiaries secured by liens other than certain permitted liens. + References No definition available. + Details
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- Definition The Company is permitted at any time, at its option, to prepay all, or from time to time prepay any part of, the then outstanding principal amount of any series of the Notes together with interest accrued on such amount to be prepaid to the date of payment, plus any applicable make-whole amount. + References No definition available. + Details
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- Definition The Company is permitted at any time, at its option, to prepay all, or from time to time prepay any part of, the then outstanding principal amount of any series of the Notes at this percentage of the principal amount of the series of the Notes to be prepaid (but, in the case of partial prepayment, not less than $1,000), together with interest accrued on such amount to be prepaid to the date of payment, plus any applicable make-whole amount. + References No definition available. + Details
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