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Interest rate in addition to LIBOR.

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Loan origination fees paid to date. These fees are being amortized over the life of the agreement.

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Percentage of New Common Stock received as an equity fee

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Percentage of collateral pledged

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

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Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

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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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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of the required periodic payments applied to interest.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount debtor-in-possession financing arranged (but not necessarily all borrowed).

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Amount of debtor-in-possession borrowings outstanding.

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Amount of write-off of debt issuance costs and debt discounts related to prepetition debt obligations.

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Discussion of whether the borrowings under the credit facility are secured or unsecured and, if secured, a description of collateral (for example, accounts receivable less than 120 days old, finished goods inventory).

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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Identification of whether the entity has been in compliance with any credit facility debt covenants during the period.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

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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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Principal amount of long-term debt and capital lease obligation maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Principal amount of long-term debt and capital lease obligation maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Principal amount of long-term debt and capital lease obligation maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Principal amount of long-term debt and capital lease obligation maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Principal amount of long-term debt and capital lease obligation maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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The total of the cash outflow during the period which has been paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt and the cost incurred directly for the issuance of equity securities.

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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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Long-Term Debt And Other Long-Term Liabilities (Narrative) (Details) - USD ($) $ in Thousands			3 Months Ended		6 Months Ended
	May 15, 2020	May 02, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Sep. 03, 2020	May 26, 2020	May 22, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Write off of debt issuance cost			$ (2,426)	$ 0	$ (2,426)	$ 0
Present worth discounted					10.00%
Debt Instrument, Periodic Payment, Interest	$ 21,500
DIP credit agreement with an average interest rate of 7.5% at June 30, 2020			8,000		$ 8,000					$ 0
Estimated principal payments in year 1			145,600		145,600
Estimated principal payments in year 2			5,600		5,600
Estimated principal payments in year 3			2,800		2,800
Estimated principal payments in year 4			36,200		36,200
Estimated principal payments in year 5			2,300		2,300
Adjustment to unamortized debt issuance costs associated with the 6.625% senior subordinated notes due 2021			2,200		2,205
6.625% Senior Subordinated Notes Due 2021 [Member]
Debt Instrument [Line Items]
Aggregate principal amount			650,000		$ 650,000
Debt instrument maturity date					May 15, 2021
Payment of Financing and Stock Issuance Costs					$ 14,700
Unit Credit Agreement [Member]
Debt Instrument [Line Items]
Commitment fee percentage under credit facility					0.375%
Origination, agency and syndication and other related fees with the credit agreement			$ 3,300		$ 3,300
Write off of debt issuance cost					$ (2,400)
Payable assessment term for LIBOR					90 days
LIBOR interest rate plus one percent					LIBOR plus 1.00% plus a margin
Unit Credit Agreement [Member] \| Minimum [Member]
Debt Instrument [Line Items]
LIBOR plus interest rate					1.50%
Unit Credit Agreement [Member] \| Maximum [Member]
Debt Instrument [Line Items]
LIBOR plus interest rate					2.50%
Unit Credit Agreement [Member] \| Proved developed producing total value of our oil and gas properties [Member]
Debt Instrument [Line Items]
Percentage of collateral pledged			80.00%		80.00%
Present worth discounted					8.00%
Superior Credit Agreement [Member]
Debt Instrument [Line Items]
Commitment fee percentage under credit facility					0.375%
Origination, agency and syndication and other related fees with the credit agreement			$ 1,700		$ 1,700
Superior Credit Agreement, Term					5 years
Credit facility current credit amount			200,000		$ 200,000
Credit facility maximum credit amount			$ 250,000		$ 250,000
Superior Credit Agreement, Interest Rate Description					annual interest at a rate, at Superior’s option, equal to (a) LIBOR plus the applicable margin of 2.00% to 3.25% or (b) the alternate base rate (greater of (i) the federal funds rate plus 0.5%, (ii) the prime rate, and (iii) the Thirty-Day LIBOR Rate (as defined in the Superior credit agreement plus 1.00%) plus the applicable margin of 1.00% to 2.25%.
Covenant Compliance					As of June 30, 2020, Superior complied with these covenants.
Superior Credit Agreement [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Consolidated EBITDA to interest expense ratio					2.50 to 1.00
Superior Credit Agreement [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Funded debt to consolidated EBITDA ratio					4.00 to 1.00
DIP credit facility [Member]
Debt Instrument [Line Items]
Debtor-in-Possession Financing, Amount Arranged								$ 18,000	$ 36,000
Percentage of New Common Stock received as an equity fee							500.00%
Pledge agreement [Member] \| Unit Credit Agreement [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Collateral		we granted a security interest in the limited liability membership interests and other equity interests we own in Superior