Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

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

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Borrowings - Schedule of Long-term Debt (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Apr. 30, 2014	Feb. 28, 2013	Sep. 30, 2013
Debt Instrument [Line Items]
Unamortized debt discounts	$ (4,209)	$ (4,399)
Long-term debt	1,536,591us-gaap_LongTermDebt	1,535,433us-gaap_LongTermDebt
Senior Notes
Debt Instrument [Line Items]
Unamortized debt discounts	(4,209)	(4,399)
Long-term debt	1,433,735	1,435,183
Senior Notes \| 8 1/8% Senior Notes Maturing June 2016
Debt Instrument [Line Items]
Stated interest rate on debt instrument (percent)	8.125%	8.125%
Senior notes	172,879	172,879
Senior Notes \| 6 5/8% Senior Secured Notes
Debt Instrument [Line Items]
Stated interest rate on debt instrument (percent)	6.625%	6.625%
Senior notes	300,000	300,000
Senior Notes \| 9 1/8% Senior Notes Maturing June 2018
Debt Instrument [Line Items]
Stated interest rate on debt instrument (percent)	9.125%	9.125%
Senior Notes \| 9 1/8% Senior Notes Maturing May 2019
Debt Instrument [Line Items]
Stated interest rate on debt instrument (percent)	9.125%	9.125%
Senior notes	235,000	235,000
Senior Notes \| 5 3/4% Senior Notes Maturing June 2019
Debt Instrument [Line Items]
Stated interest rate on debt instrument (percent)	5.75%		5.75%
Senior notes	325,000	325,000
Senior Notes \| 7 1/4% Senior Notes Maturing February 2023
Debt Instrument [Line Items]
Stated interest rate on debt instrument (percent)	7.25%	7.25%		7.25%
Senior notes	200,000	200,000
Senior Notes \| 7 1/2% Senior Notes Maturing September 2021
Debt Instrument [Line Items]
Stated interest rate on debt instrument (percent)	7.50%	7.50%			7.50%
Senior notes	200,000	200,000
Senior Notes \| TEU Senior Amortizing Notes
Debt Instrument [Line Items]
Senior notes	5,065	6,703
Junior Subordinated Notes
Debt Instrument [Line Items]
Stated interest rate on debt instrument (percent)	7.987%
Unamortized debt discounts	(44,500)
Long-term debt	56,253	55,737
Cash Secured Loan
Debt Instrument [Line Items]
Long-term debt	22,368	22,368
Other Secured Notes Payable
Debt Instrument [Line Items]
Long-term debt	$ 24,235	$ 22,145