Represents the amount of quarterly repayments due per the terms of the debt agreement.

No definition available.

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- Definition

Amount of noncash expense included in interest expense to allocate debt discount and premium, and the costs to issue debt and obtain financing over the related debt instruments. Alternate captions include noncash interest expense.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate amount of interest expense on all borrowings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.7,8)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Weighted average interest rate of long-term debt outstanding.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Period Type:	instant

- Details

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- Details

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- Details

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- Details

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Long-term Debt (Details 5) (USD $)	3 Months Ended		6 Months Ended
Long-term Debt (Details 5) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014	Sep. 30, 2011
Long-term debt
Interest expense	$ 36,100,000us-gaap_InterestExpenseBorrowings	$ 12,400,000us-gaap_InterestExpenseBorrowings	$ 48,300,000us-gaap_InterestExpenseBorrowings	$ 22,600,000us-gaap_InterestExpenseBorrowings
Non-cash interest expense	4,500,000	600,000	5,042,000	1,153,000
Weighted average interest rate (as a percent)	5.20%		5.20%		7.60%
Senior Secured Notes 7.625 Percent and Convertible Senior Subordinated Notes 8.75 Percent
Long-term debt
Interest expense			24,800,000
Senior Secured Notes 7.625 Percent
Long-term debt
Interest rate on secured notes (as a percent)	7.625%		7.625%		7.625%	7.625%
Convertible Senior Subordinated Notes 8.75 Percent Due 2016
Long-term debt
Interest rate on secured notes (as a percent)	8.75%		8.75%		8.75%
Senior secured term loan, due March 2022
Long-term debt
Required quarterly repayments due			$ 1,100,000