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Derivative Instruments and Hedging Activities (Tables) | 3 Months Ended
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Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Fair value of derivative financial instruments on the Condensed Consolidated Balance Sheet | The table below presents the fair value of the derivative financial instruments on the Condensed Consolidated Balance Sheet on December 31, 2012 and 2011 and September 30, 2012:
|  |  |  | Fair Value of Derivative Instruments
|  |  |  | December 31, |  | September 30,
Derivative Instrument |  | Balance Sheet Location |  | 2012 |  | 2011 |  | 2012
|  |  |  | (in thousands) |  |
Non-designated derivatives: |  |  |  |  |  |  |  |
Gold Collar |  | Prepaid expenses and other assets |  | $ | — |  |  | $ | 1,073 |  |  | $ | — |
Fair value of the Company's derivative financial instruments on the consolidated statement of operations | The table below presents the effect of our derivative financial instruments on the Condensed Consolidated Statements of Operations for three months ended December 31, 2012 and 2011:
|  |  |  | (Gains) Recognized in Income
|  |  |  | Three Months Ended December 31,
Derivative Instrument |  | Location of (Gain) |  | 2012 |  | 2011
|  |  |  | (in thousands)
Non-designated derivatives: |  |  |  |  |  |
Gold Collar |  | Other income |  | $ | — |  |  | $ | (1,073 | )

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- Definition Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph b -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -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 -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -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. + Details
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