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Derivative Instruments and Hedging Activities (Narrative) (Details) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Dec. 31, 2010 USD ($) | Mar. 31, 2012 USD ($) | Sep. 30, 2010 USD ($) | Sep. 30, 2010 EUR (€)
Derivative Instruments and Hedging Activities |  |  |  |
Foreign currency exchange rate contract |  |  | $ 52,549 | € 39,000
Gain on the fair market value of foreign currency exchange rate contract |  |  | 579 |
Realized loss on settlement of forward contract | 1,033 |  |  |
Net unrecognized losses on terminated derivative instruments expected to be reclassified to earnings |  | $ 171 |  |
Term of gain or loss recognition in interest expense on terminated derivatives recorded in OCI |  | twelve months |  |

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- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References No definition available. + Details
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- Definition Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset. + References 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FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 + Details
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- Definition Aggregate notional amount of foreign currency derivatives to purchase a foreign currency. Notional amount refers to the number of currency units specified in the foreign currency derivative contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579245-113959 + Details
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- Definition Amount of gain (loss) recognized in earnings in the period from the settlement of derivative instruments. + References No definition available. + Details
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