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DEBT AND CREDIT FACILITIES (Narrative) (Details) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Dec. 31, 2015 USD ($)
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Payments of Debt Issuance Costs |  |  |  |  | $ 5.2 |  | $ 33.6 |  |
Letters of credit outstanding |  | $ 108.8 |  |  | 108.8 |  |  | $ 186.3 |
Gain (loss) on extinguishment/restructuring of debt |  | (18.3) |  | $ 79.2 | 164.1 |  | $ 392.9 |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Credit facility, amount outstanding | [1] | 0.0 |  |  | 0.0 |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 355.7 |  |  | 355.7 |  |  | 366.0 |
Debt Instrument, Par Value |  | 550.0 | [1] |  | 550.0 | [1] |  | 550.0 | [2]
Credit facility remaining capacity |  | 246.9 |  |  | 246.9 |  |  | 179.2 |
Letters of credit outstanding |  | $ 108.8 |  |  | $ 108.8 |  |  | $ 186.3 |
Revolving Credit Facility [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Base Rate |  |  |  |  | 0.005 |  |  |  |
$218.5 Million 8.00% 2020 Lien Notes [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Stated interest rate |  | 8.00% |  |  | 8.00% |  |  |  |
Repurchase Price of $218.5M 8.00% Notes if Triggering Event Occurs |  |  |  |  | 1.01 |  |  |  |
Initial Redemption Price |  |  |  |  | 1.04 |  |  |  |
Debt Instrument, Par Value |  | $ 218.5 |  |  | $ 218.5 |  |  |  |
Redemption Price after September 30, 2017 |  |  |  |  | 1.00 |  |  |  |
Redemption Price from time to time and prior to September 30, 2017 |  |  |  |  | 1.00 |  |  |  |
Amount in aggregate that can be redeemed on or prior to September 30, 2017 |  |  |  |  | 0.35 |  |  |  |
Redemption Price of 35 percent or less of Outstanding |  |  |  |  | 1.08 |  |  |  |
Amount to Remain Outstanding Prior to September 30, 2017 |  |  |  |  | 0.65 |  |  |  |
$544 Million 7.75% 2020 Lien Notes[Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Stated interest rate |  | 7.75% |  |  | 7.75% |  |  |  |
$540 Million 8.25% 2020 Lien Notes [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Stated interest rate |  | 8.25% |  |  | 8.25% |  |  |  |
In the Event of Default Amount that will Accelerate |  |  |  |  | 0.25 |  |  |  |
Senior Notes Five Hundred Million 3.95% [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Par Value |  | $ 283.6 |  |  | $ 283.6 |  |  |  |
Debt Redemption Expenses |  | 2.5 |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  | 301.0 |  |  | 301.0 |  |  |  |
Amortization of Debt Discount (Premium) |  | $ 17.4 |  |  |  |  |  |  |
Gain (loss) on extinguishment/restructuring of debt |  |  |  |  | 19.9 |  |  |  |
Exchange of Debt [Member] | $218.5 Million 8.00% 2020 Lien Notes [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Gain (loss) on extinguishment/restructuring of debt |  |  |  |  | $ 174.3 |  |  |  |
[1] | As of September 30, 2016, no loans were drawn under the ABL Facility and we had total availability of $355.7 million as a result of borrowing base limitations. As of September 30, 2016, the principal amount of letter of credit obligations totaled $108.8 million, thereby further reducing available borrowing capacity on our ABL Facility to $246.9 million.
[2] | As of December 31, 2015, no loans were drawn under the ABL Facility and we had total availability of $366.0 million as a result of borrowing base limitations. As of December 31, 2015, the principal amount of letter of credit obligations totaled $186.3 million and commodity hedge obligations totaled $0.5 million, thereby further reducing available borrowing capacity on our ABL Facility to $179.2 million.

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