Financial Instruments and Hedging Activities (Quantitative Summary of Fair Value of Derivative Instruments) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Derivatives, Fair Value [Line Items]
Net asset (liability) value of non-hedged derivative instruments	$ (575)	$ 2,805
Foreign currency contracts \| Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Asset value of non-hedge derivative instruments	0	1,047
Security Price Guarantees \| Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Asset value of non-hedge derivative instruments	0	1,758
Security Price Guarantees \| Accrued expenses and other current liabilities
Derivatives, Fair Value [Line Items]
Liability value of non-hedge derivative instruments	$ (575)	$ 0

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959

Name:	us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant