Financial Instruments and Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Sep. 30, 2011
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets
Institutional money market investments	$ 1,166,769	$ 590,515
Forward exchange contracts	0
Interest rate swap	0
Total Assets	1,166,769	590,515
Liabilities
Forward exchange contracts	0
Contingent consideration liability	0
Total Liabilities	0
Significant Other Observable Inputs (Level 2) [Member]
Assets
Institutional money market investments	0
Forward exchange contracts	5,733	37,198
Interest rate swap	3,252	5,959
Total Assets	8,985	43,157
Liabilities
Forward exchange contracts	15,693	39,589
Interest rate swap		69,103
Contingent consideration liability	0
Total Liabilities	15,693	108,692
Significant Unobservable Inputs (Level 3) [Member]
Assets
Institutional money market investments	0
Forward exchange contracts	0
Interest rate swap	0
Total Assets	0
Liabilities
Forward exchange contracts	0
Contingent consideration liability	8,077
Total Liabilities	8,077
Total [Member]
Assets
Institutional money market investments	1,166,769	590,515
Forward exchange contracts	5,733	37,198
Interest rate swap	3,252	5,959
Total Assets	1,175,754	633,672
Liabilities
Forward exchange contracts	15,693	39,589
Interest rate swap		69,103
Contingent consideration liability	8,077
Total Liabilities	$ 23,770	$ 108,692

Contingent consideration liability recognized as part of business combination transaction.

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This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Company may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 8

-Footnote 2

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 7, 8, 9, 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

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-Name Accounting Standards Codification

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-Name Statement of Financial Accounting Standard (FAS)

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- Definition

Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10

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Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

+ References

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- Definition

This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

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