Derivative Instruments and Hedging Activities (Unrecognized Gains and Losses and Recognized Gains Associated with Derivative Instruments in Balance Sheet) (Details) (USD $) In Thousands	Sep. 30, 2011	Sep. 30, 2010
Designated as Hedging Instrument [Member]
Unrecognized gain (loss)	$ (778)	$ (941)
Designated as Hedging Instrument [Member] \| Accumulated Other Comprehensive Earnings [Member]
Unrecognized gain (loss)	(781)	(1,011)
Designated as Hedging Instrument [Member] \| Current and Long-Term Debt [Member]
Unrecognized gain (loss)	3	70
Not Designated as Hedging Instrument [Member] \| Other Current Assets [Member]
Recognized gain (loss)	$ 0	$ 579

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

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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=6935481&loc=SL5624163-113959

Name:	us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant