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SUBSEQUENT EVENTS (Details) $ / shares in Units, $ in Millions | Oct. 09, 2019 item | Oct. 08, 2019 USD ($) series $ / shares shares | Feb. 09, 2018 $ / shares shares | Sep. 07, 2017 USD ($) item | Oct. 07, 2019 shares | Sep. 30, 2019 $ / shares shares | Aug. 02, 2019 USD ($) | Dec. 31, 2018 $ / shares shares
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SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Total Net Leverage Ratio |  | 4.00 |  |  |  |  |  |
Common stock, shares authorized |  |  |  |  |  | 1,000,000,000 |  | 1,000,000,000
Common stock, par value (in dollars per share) | $ / shares |  |  | $ 0.0001 |  |  | $ 0.0001 |  | $ 0.0001
Shares issued |  |  | 9,200,000 |  |  |  |  |
Number of series of warrants | series |  | 3 |  |  |  |  |  |
Senior revolving credit facility |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Number of interim unscheduled redeterminations of borrowing base to which the company and lender each have the right | item |  |  |  | 1 |  |  |  |
Number of consecutive semi-annual redeterminations between which the company and the lenders each have the right to one interim unscheduled redetermination of borrowing base | item |  |  |  | 2 |  |  |  |
Total borrowing base | $ |  |  |  | $ 1,000.0 |  |  |  |
Initial borrowing base | $ |  |  |  | $ 225.0 |  |  |  |
Applicable margin (as a percent) |  |  |  | 2.00% |  |  |  |
Senior revolving credit facility | Minimum |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Current Ratio |  |  |  | 1.00 |  |  |  |
Senior revolving credit facility | Minimum | LIBOR |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  |  |  | 2.75% |  |  |  |
Senior revolving credit facility | Minimum | ABR - based |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  |  |  | 1.75% |  |  |  |
Senior revolving credit facility | Maximum | LIBOR |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  |  |  | 3.75% |  |  |  |
Senior revolving credit facility | Maximum | ABR - based |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  |  |  | 2.75% |  |  |  |
The Restructuring Support Agreement |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Estimated enterprise value | $ |  |  |  |  |  |  | $ 425.0 |
Warrant term (in years) |  |  |  |  |  |  | 3 years |
Registration Rights Agreement |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Maximum period to file the registration statement with SEC |  | 90 years |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Current Ratio |  | 1.00 |  |  |  |  |  |
Total Stock, authorized (in shares) |  | 101,000,000 |  |  | 1,001,000,000 |  |  |
Common stock, shares authorized |  | 100,000,000 |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  | $ 0.0001 |  |  |  |  |  |
Preferred stock, shares authorized |  | 1,000,000 |  |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  | $ 0.0001 |  |  |  |  |  |
Number of shares of common stock that can be purchased from warrants |  | 1 |  |  |  |  |  |
Warrant term (in years) |  | 3 years |  |  |  |  |  |
Subsequent events | Series A Warrants |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Warrants issued |  | 1,798,322 |  |  |  |  |  |
Warrants exercise price (in dollars per share) | $ / shares |  | $ 40.17 |  |  |  |  |  |
Subsequent events | Series B Warrants |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Warrants issued |  | 2,247,985 |  |  |  |  |  |
Warrants exercise price (in dollars per share) | $ / shares |  | $ 48.28 |  |  |  |  |  |
Subsequent events | Series C Warrants |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Warrants issued |  | 2,890,271 |  |  |  |  |  |
Warrants exercise price (in dollars per share) | $ / shares |  | $ 60.45 |  |  |  |  |  |
Subsequent events | Existing Equity Interests Rights Offering |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Shares issued |  | 421,827 |  |  |  |  |  |
Subsequent events | Senior Noteholder Rights Offering |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Shares issued |  | 8,059,111 |  |  |  |  |  |
Subsequent events | Backstop Commitment |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Shares issued |  | 3,558,334 |  |  |  |  |  |
Subsequent events | Backstop Commitment Premium |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Shares issued |  | 657,590 |  |  |  |  |  |
Subsequent events | Senior Noteholders pursuant to a mandatory exchange |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Shares issued |  | 3,790,247 |  |  |  |  |  |
Subsequent events | Pre-emergence stockholders pursuant to a mandatory exchange |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Shares issued |  | 374,421 |  |  |  |  |  |
Subsequent events | Exit financing |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Number of interim unscheduled redeterminations of borrowing base to which the company and lender each have the right | item | 1 |  |  |  |  |  |  |
Number of consecutive semi-annual redeterminations between which the company and the lenders each have the right to one interim unscheduled redetermination of borrowing base | item | 2 |  |  |  |  |  |  |
Total borrowing base | $ |  | $ 750.0 |  |  |  |  |  |
Initial borrowing base | $ |  | 275.0 |  |  |  |  |  |
Initial draw amount | $ |  | 130.0 |  |  |  |  |  |
Amount available for issuance of letters of credit | $ |  | $ 50.0 |  |  |  |  |  |
Percentage of asset disposition or swap termination to borrowing base that may require mandatory prepayments |  | 10.00% |  |  |  |  |  |
Subsequent events | Minimum |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Estimated enterprise value | $ |  | $ 425.0 |  |  |  |  |  |
Subsequent events | Minimum | Exit financing | LIBOR |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  | 2.00% |  |  |  |  |  |
Subsequent events | Minimum | Exit financing | ABR - based |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  | 1.00% |  |  |  |  |  |
Subsequent events | Maximum |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Estimated enterprise value | $ |  | $ 475.0 |  |  |  |  |  |
Subsequent events | Maximum | Predecessor |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Voting interest less than of which predecessor receive (as a percent) |  | 50.00% |  |  |  |  |  |
Subsequent events | Maximum | Exit financing | LIBOR |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  | 3.00% |  |  |  |  |  |
One time basis point increase in interest rate margin (as a percent) |  | 0.50% |  |  |  |  |  |
Subsequent events | Maximum | Exit financing | ABR - based |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  | 2.00% |  |  |  |  |  |

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