Face (par) amount of debt instrument at time of issuance.

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

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of asset related to consideration paid in advance for interest that provides economic benefits within a future period of one year or the normal operating cycle, if longer.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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LONG-TERM DEBT - Senior Unsecured Notes (Details) - USD ($)	1 Months Ended
	Oct. 31, 2016	Aug. 31, 2015	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2016	Nov. 30, 2015	Aug. 31, 2013	Mar. 31, 2012
Debt Instrument [Line Items]
Accrued interest			$ 19,027,000		$ 5,512,000
Senior Unsecured Notes \| 2013 9 3/4% Senior Unsecured Notes
Debt Instrument [Line Items]
Loan face amount							$ 500,000,000
Note stated interest rate (as a percent)			9.75%				9.75%
Proceeds from issuance of debt		$ 85,000,000
Accrued interest			$ 4,800,000		4,800,000
Senior Unsecured Notes \| 2016 Senior Unsecured Notes
Debt Instrument [Line Items]
Loan face amount	$ 500,000,000
Note stated interest rate (as a percent)	7.875%		7.875%
Accrued interest				$ 18,100,000
Senior Unsecured Notes \| 2016 Senior Unsecured Notes \| Redeemable in Whole or in Part
Debt Instrument [Line Items]
Redemption price (as a percent)	100.00%
Senior Unsecured Notes \| 2016 Senior Unsecured Notes \| Redeemable Rate Upon Change of Control
Debt Instrument [Line Items]
Redemption price (as a percent)	101.00%
Senior Unsecured Notes \| 2016 Senior Unsecured Notes \| Redeemable Rate Upon Certain Asset Sales
Debt Instrument [Line Items]
Redemption price (as a percent)	100.00%
Senior Unsecured Notes \| 2016 Senior Unsecured Notes \| Debt Instrument, Redemption, Period Four
Debt Instrument [Line Items]
Redemption price (as a percent)	100.00%
Senior Unsecured Notes \| 2015 Senior Unsecured Notes
Debt Instrument [Line Items]
Loan face amount						$ 100,000,000
Prepaid Interest					1,100,000
Credit Facility \| Facility Agreement
Debt Instrument [Line Items]
Borrowing capacity						$ 100,000,000
Senior Subordinated Notes \| 2012 11 % Senior Subordinated Notes
Debt Instrument [Line Items]
Loan face amount								$ 344,200,000.0
Note stated interest rate (as a percent)			11.00%					11.00%
Accrued interest			$ 490,000		$ 490,000