| **LONG-TERM DEBT ADDITIONAL INFORMATION (Details) - USD ($)**                                                                                |               |                |                |                |                | 3 Months Ended | 12 Months Ended |
|----------------------------------------------------------------------------------------------------------------------------------------------|---------------|----------------|----------------|----------------|----------------|----------------|-----------------|
||
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Redemption of senior notes                                                                                                                   |          |           |           |           |           |           |            | $ 0 | $ (519,375,000) | $ 0 |
| Loss on extinguishment of debt                                                                                                               |          |           |           |           |           |           |            | 0 | 24,747,000 | $ 0 |
| Convertible Note, Conversion Price                                                                                                           |          |           |           |           |           |           |            |   |   | $ 85.39 |
| Debt Issuance Costs ($)                                                                                                                      |          |           |           |           |           |           |            | 7,704,000 | 50,000 | $ 15,556,000 |
| Line of Credit Facility, Initial Borrowing Base                                                                                              |          |           |           |           |           |           |            | 1,300,000,000 |   |   |
| Line of Credit, Initial Elected Commitment                                                                                                   |          |           |           |           |           |           |            | 700,000,000 |   |   |
| Swingline Facility                                                                                                                           |          |           |           |           |           |           |            | 25,000,000 |   |   |
| Debt Issuance Costs, Line of Credit Arrangements, Net                                                                                        |          |           |           |           |           |           |            | 11,500,000 | 6,200,000 |   |
| Line of Credit Facility, Capacity Available for Trade Purchases                                                                              |          |           |           |           |           |           |            | $ 1,300,000,000 | 700,000,000 |   |
| Line of Credit Facility, Weighted Average Interest Rate                                                                                      |          |           |           |           |           |           |            | 4.50% |   |   |
| 5.75% Senior Notes due 2026 [Member]                                                                                                         |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Issuance Date                                                                                                               |          |           |           |           |           |           |            | Nov. 29,  2017 |   |   |
| Debt Instrument, Interest Rate, Stated Percentage                                                                                            |          |           |           |           |           |           |            | 5.75% |   |   |
| Debt Instrument, Redemption, Description                                                                                                     |          |           |           |           |           |           |            | 0.35 |   |   |
| Minimum percent of aggregate principal debt amount required to remain outstanding                                                            |          |           |           |           |           |           |            | 65.00% |   |   |
| 6.125% Senior Notes due 2024 [Member]                                                                                                        |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Issuance Date                                                                                                               |          |           |           |           | Sep. 12,  2016 |           |            |   |   |   |
| Debt Instrument, Interest Rate, Stated Percentage                                                                                            |          |           |           |           |           |           |            | 6.125% |   |   |
| Debt Instrument, Redemption, Description                                                                                                     |          |           |           |           |           |           |            | .35 |   |   |
| Minimum percent of aggregate principal debt amount required to remain outstanding                                                            |          |           |           |           |           |           |            | 65.00% |   |   |
| 1.125% Convertible Senior Notes due 2021 [Member]                                                                                            |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Issuance Date                                                                                                               |          |           |           |           |           |           | Sep. 12,  2016  |   |   |   |
| Debt Instrument, Interest Rate, Stated Percentage                                                                                            |          |           |           |           |           |           |            | 1.125% |   |   |
| Convertible Senior Note, Shares Issued Upon Conversion                                                                                       |          |           |           |           |           |           |            | 11.7113 |   |   |
| 5.75% Senior Notes due 2026 [Member]                                                                                                         |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Principal amount                                                                                                                             |          |           |           |           |           |           |            | $ 600,000,000 | 600,000,000 |   |
| Debt Issuance Costs, Gross                                                                                                                   |          |           |           |           |           |           |            | $ 7,600,000 |   |   |
| First Payment [Member] | 5.75% Senior Notes due 2026 [Member]                                                                                |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Frequency of Periodic Payment                                                                                               |          |           |           |           |           |           |            | May 15 |   |   |
| First Payment [Member] | 6.125% Senior Notes due 2024 [Member]                                                                               |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Frequency of Periodic Payment                                                                                               |          |           |           |           |           |           |            | March 15 |   |   |
| First Payment [Member] | 1.125% Convertible Senior Notes due 2021 [Member]                                                                   |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Frequency of Periodic Payment                                                                                               |          |           |           |           |           |           |            | March 15 |   |   |
| Second Payment [Member] | 5.75% Senior Notes due 2026 [Member]                                                                               |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Frequency of Periodic Payment                                                                                               |          |           |           |           |           |           |            | November 15 |   |   |
| Second Payment [Member] | 6.125% Senior Notes due 2024 [Member]                                                                              |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Frequency of Periodic Payment                                                                                               |          |           |           |           |           |           |            | September 15 |   |   |
| Second Payment [Member] | 1.125% Convertible Senior Notes due 2021 [Member]                                                                  |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Frequency of Periodic Payment                                                                                               |          |           |           |           |           |           |            | September 15 |   |   |
| Maximum Borrowing Base [Member] | Revolving Credit Facility [Member]                                                                         |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Line of Credit Facility, Maximum Borrowing Capacity ($)                                                                                      |          |           |           |           |           |           |            | $ 2,500,000,000 |   |   |
| 1.125% Convertible Senior Notes due 2021 [Member]                                                                                            |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Principal amount                                                                                                                             |          |           |           |           |           |           |            | 200,000,000 | 200,000,000 |   |
| Debt Issuance Costs, Gross                                                                                                                   |          |           |           |           |           |           |            | 4,800,000 |   |   |
| Liability component of gross proceeds of Convertible Notes                                                                                   |          |           |           |           |           |           |            | 160,500,000 |   |   |
| Convertible Debt, Equity Component ($)                                                                                                       |          |           |           |           |           |           |            | 39,500,000 |   |   |
| 6.125% Senior Notes due 2024 [Member]                                                                                                        |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Issuance Costs, Gross                                                                                                                   |          |           |           |           |           |           |            | 7,800,000 |   |   |
| Senior Notes ($)                                                                                                                             |          |           |           |           |           |           |            | $ 400,000,000 | $ 400,000,000 |   |
| Scenario, Forecast [Member] | 1.125% Convertible Senior Notes due 2021 [Member]                                                              |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Convertible Note Principal Amount                                                                                                            |          |           | $ 1,000        |           |           |           |            |   |   |   |
| Scenario, Forecast [Member] | 2024 Senior notes redemption price, after September 15, 2019. [Member] | 6.125% Senior Notes due 2024 [Member] |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Redemption Price, Percentage                                                                                                |          |           |           | 106.125%       |           |           |            |   |   |   |
| Subsequent Event [Member]                                                                                                                    |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Maturity Date                                                                                                               | May 15,  2026 | Sep. 15,  2021 |           |           |           |           |            |   |   |   |
| Subsequent Event [Member] | 5.75% Senior Notes due 2026 [Member]                                                                             |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Redemption Period, End Date                                                                                                 |          |           |           |           |           | May 15,  2021  |            |   |   |   |
| Subsequent Event [Member] | 6.125% Senior Notes due 2024 [Member]                                                                            |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Redemption Period, End Date                                                                                                 |          |           |           | Sep. 15,  2019 |           |           |            |   |   |   |
| Subsequent Event [Member] | 1.125% Convertible Senior Notes due 2021 [Member]                                                                |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Convertible Note, Conversion Price                                                                                                           |          |           | $ 85.39        |           |           |           |            |   |   |   |
| Debt Instrument, Call Date, Latest                                                                                                           |          |           | Mar. 15,  2021 |           |           |           |            |   |   |   |
| Subsequent Event [Member] | 2026 Senior notes redemption price, after to May 15, 2021 [Member] | 5.75% Senior Notes due 2026 [Member]        |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Redemption Price, Percentage                                                                                                |          |           |           |           |           | 104.313%       |            |   |   |   |
| Subsequent Event [Member] | 2026 Senior notes redemption price, prior to May 15, 2021 [Member] | 5.75% Senior Notes due 2026 [Member]        |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Redemption Price, Percentage                                                                                                |          |           |           |           |           | 105.75%        |            |   |   |   |
| Subsequent Event [Member] | 2024 Senior notes redemption price, prior to September 15, 2019 [Member] | 6.125% Senior Notes due 2024 [Member] |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Debt Instrument, Redemption Price, Percentage                                                                                                |          |           |           | 104.594%       |           |           |            |   |   |   |
| Restricted Stock [Member]                                                                                                                    |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Share Price                                                                                                                                  |          |           |           |           |           |           |            | $ 29.76 | $ 51.54 | $ 72.58 |
| Unused Commitment Fee [Member]                                                                                                               |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Line of Credit Facility, Interest Rate at Period End                                                                                         |          |           |           |           |           |           |            | 0.375% |   |   |
| Alternate Base Rate Option [Member]                                                                                                          |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Line of Credit Facility, Interest Rate at Period End                                                                                         |          |           |           |           |           |           |            | 0.25% |   |   |
| LIBOR Option [Member]                                                                                                                        |          |           |           |           |           |           |            |   |   |   |
| **Debt Instrument [Line Items]**                                                                                                             |          |           |           |           |           |           |            |   |   |   |
| Line of Credit Facility, Interest Rate at Period End                                                                                         |          |           |           |           |           |           |            | 1.25% |   |   |

| X                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Convertible Note Principal Amount
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| - Definition
Number of shares issued for each share of convertible senior notes that is converted.
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| - Definition
Liability component of the gross proceeds of Convertible Notes prior to their maturity date.
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| - Definition
Line of Credit Facility, Initial Borrowing Base
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| - Definition
Line of Credit Facility, Weighted Average Interest Rate
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| - Definition
Line of Credit, Initial Elected Commitment
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| - Definition
Minimum percent of aggregate principal debt amount required to remain outstanding
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| - Definition
Swingline Facility
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder.
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| - Definition
Latest date before maturity which the issuer can call the outstanding debt instrument for repayment or conversion to equity, in CCYY-MM-DD format.
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| - Definition
The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.
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| - Definition
The price per share of the conversion feature embedded in the debt instrument.
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| - Definition
Description of the frequency of periodic payments (monthly, quarterly, annual).
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| - Definition
Contractual interest rate for funds borrowed, under the debt agreement.
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| - Definition
Date the debt instrument was issued, in CCYY-MM-DD format.
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| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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| - Definition
Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.
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| - Definition
Description of debt redemption features under terms of the debt agreement.
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| - Definition
End date of debt instrument redemption period, in CCYY-MM-DD format.
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| - Definition
Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.
+ References
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| - Definition
Amount, after accumulated amortization, of debt issuance costs related to line of credit arrangements. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.
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| - Definition
Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.
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| - Definition
Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.
+ References
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| - Definition
The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for financing purchases of goods acquired for inventory or imminent delivery to a customer.
+ References
No definition available.
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| - Definition
The effective interest rate at the end of the reporting period.
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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.
+ References
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| - Definition
The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.
+ References
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| - Definition
The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period.
+ References
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| - Definition
Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.
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| - Definition
Price of a single share of a number of saleable stocks of a company.
+ References
No definition available.
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