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DEBT - Senior Facility (Details) $ in Thousands |  |  |  |  |  | 1 Months Ended | 2 Months Ended | 8 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 29, 2020 USD ($) | Apr. 30, 2020 USD ($) | Nov. 21, 2019 USD ($) | Oct. 18, 2019 | Sep. 07, 2017 USD ($) item | Jul. 31, 2020 | Oct. 31, 2019 item | Dec. 31, 2019 USD ($) item | Dec. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) item | Nov. 01, 2020 USD ($) | Oct. 28, 2020 | Oct. 08, 2019 USD ($) | Oct. 01, 2019 USD ($)
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  | $ 144,000 | $ 160,209 | $ 160,209 |  |  |  |
Debt Instrument, Threshold Total Net Indebtedness Leverage Ratio |  |  |  |  |  |  |  |  |  | 3.50 |  |  |  |
Covenant compliance |  |  |  |  |  |  |  |  |  | As of December 31, 2020 (Successor), after giving effect to the Third Amendment, discussed below, the Company was in compliance with the financial covenants under the Senior Credit Agreement. |  |  |  |
Senior revolving credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |  |
Current borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 225,000
Amount available for issuance of letters of credit |  |  |  |  |  |  |  |  |  |  |  |  | $ 25,000 |
Prepayment deficiency percentage exception |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |
Senior revolving credit facility | ABR-based | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  |  |  |  | 1.75% |  |  |  | 1.50% |  |  |  |  |
Senior revolving credit facility | ABR-based | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  |  |  |  | 2.75% |  |  |  |  |  |  |  |  |
Senior revolving credit facility | LIBOR | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  |  |  |  | 2.75% |  |  |  |  |  |  |  |  |
Senior revolving credit facility | LIBOR | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  |  |  |  | 3.75% |  |  |  |  |  |  |  |  |
Successor Senior revolving credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  | $ 750,000 |
Current borrowing capacity |  |  |  |  |  |  |  |  | $ 190,000 | $ 190,000 |  |  |  |
Minimum mortgaged total value of proved Borrowing Base Properties |  |  |  |  |  |  |  |  |  |  |  | 85.00% |  |
Number of interim unscheduled redeterminations of borrowing base to which the company and lender each have the right | item |  |  |  |  |  |  | 1 | 1 |  | 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 | 2 |  | 2 |  |  |  |
Amount outstanding |  |  |  |  |  |  |  |  | 158,000 | $ 158,000 |  |  |  |
Letters of credit outstanding |  |  |  |  |  |  |  |  | 4,700 | 4,700 |  |  |  |
Borrowing capacity available |  |  |  |  |  |  |  |  | $ 27,300 | $ 27,300 |  |  |  |
Successor Senior revolving credit facility | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current Ratio |  |  |  |  |  |  |  |  |  | 1.00 |  |  |  |
Current ratio waived |  |  |  |  |  | 1.00 |  |  |  |  |  |  |  |
Successor Senior revolving credit facility | ABR-based | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  |  |  |  |  |  |  |  | 2.50% |  |  |  |  |
Successor Senior revolving credit facility | LIBOR | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  |  |  |  |  |  |  |  | 2.50% |  |  |  |  |
Successor Senior revolving credit facility | LIBOR | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  |  |  |  |  |  |  |  | 3.50% |  |  |  |  |
Successor Senior revolving credit facility | Euro-dollar based | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  |  |  |  |  |  |  |  | 0.50% |  |  |  |  |
Third Amendment to the Senior Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current borrowing capacity |  |  |  |  |  |  |  |  |  |  | $ 190,000 |  |  |
Amount available for issuance of letters of credit | $ 25,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum mortgaged total value of proved Borrowing Base Properties | 90.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum uncontested accounts payable or accrued expenses, liabilities or other obligations from remaining outstanding for longer than 90 days | $ 3,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Third Amendment to the Senior Credit Agreement | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt covenant, commodity hedging agreements, volume percentage | 65.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Second Amendment to Senior Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Scheduled borrowing base reductions per month | $ 5,000 |  |  |  |  |  |  |  |  |  |  |  |  |
First Amendment To Senior Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current borrowing capacity |  |  | $ 240,000 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Threshold Total Net Indebtedness Leverage Ratio |  |  | 3.50 |  |  |  |  |  |  |  |  |  |  |
Second Amendment to the Senior Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Scheduled borrowing base reductions per month |  | $ 5,000 |  |  |  |  |  |  |  |  |  |  |  |
Current borrowing capacity |  | 200,000 |  |  |  |  |  |  |  |  | $ 185,000 |  |  |
Second Amendment to the Senior Credit Agreement [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum cash balance to be carried before needing to repay borrowings |  | $ 10,000 |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, waiver, settlement |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Second Amendment to the Senior Credit Agreement [Member] | ABR-based | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  | 1.50% |  |  |  |  |  |  |  |  |  |  |  |
Second Amendment to the Senior Credit Agreement [Member] | ABR-based | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  | 2.50% |  |  |  |  |  |  |  |  |  |  |  |
Second Amendment to the Senior Credit Agreement [Member] | Euro-dollar based | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  | 2.50% |  |  |  |  |  |  |  |  |  |  |  |
Second Amendment to the Senior Credit Agreement [Member] | Euro-dollar based | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin (as a percent) |  | 3.50% |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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