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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 |
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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 |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3044-108585 + Details
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- Definition The maximum value of the Company’s ratio of consolidated net debt to consolidated earnings before interest, taxes, depreciation, amortization, and stock-based compensation, plus any unusual non-cash charges to the extent deducted in computing net income minus any unusual non-cash gains to the extent added in computing net income (leverage ratio) required for financial covenant compliance. + References No definition available. + Details
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- Definition The maximum value of the Company’s ratio of consolidated net debt to consolidated earnings before interest, taxes, depreciation, amortization, and stock-based compensation, plus any unusual non-cash charges to the extent deducted in computing net income minus any unusual non-cash gains to the extent added in computing net income (leverage ratio) required for financial covenant compliance during the next two succeeding fiscal quarters following a material acquisition. + References No definition available. + Details
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- Definition The revolving credit facility agreement contains contains customary events of default including certain 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. + References No definition available. + Details
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