Bond Repurchase Program, Authorized Amount

No definition available.

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- Definition

Debt Instrument, Collateral, Percentage Of Value Of Proven Oil And Gas Reserves And Lien On Other Assets

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Covenant, Dividend Payments, Minimum Remaining Borrowing Capacity Or Elected Commitment Required, Percentage

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Covenant, Maximum Leverage Ratio

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Covenant, Minimum Current Ratio

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Debt Instrument, Covenant, Reduction In Borrowing Base If Unsecured Debt Is Incurred, Percentage

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Covenant, Repurchase Of Equity And Debt, Maximum Pro Forma Leverage Ratio Allowable

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Debt Instrument, Covenant, Repurchase Of Equity And Debt, Minimum Remaining Borrowing Capacity Required, Percentage

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Payments To Long-Term Line Credit, Consolidated Cash Balance Trigger

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Debt Issuance Expense, Extinguishment Of Debt

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line Of Credit, Maximum Borrowing Capacity Exceed, Deficiency Cure Period

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Line Of Credit, Maximum Borrowing Capacity Exceed, Remediation Period

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Ratio Of Current Assets To Current Liabilities

+ References

No definition available.

+ Details

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Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of amortization expense attributable to debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Topic 835
-SubTopic 30
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-Paragraph 3
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+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Period Type:	duration

- 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.

+ References

No definition available.

+ Details

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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.

+ References

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-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section S45
-Paragraph 1
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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

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Balance Type:	debit
Period Type:	instant

- 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.

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+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

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.

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- 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

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.

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-SubTopic 220
-Section S99
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Balance Type:	debit
Period Type:	duration

- Definition

Indebtedness divided by net capital.

+ References

No definition available.

+ Details

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Debt - Narrative (Details)		3 Months Ended		9 Months Ended
Debt - Narrative (Details)	Aug. 26, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Apr. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Feb. 27, 2020 USD ($)	Jul. 31, 2017 USD ($)
Debt Instrument [Line Items]
Debt issuance costs		$ 5,715,000		$ 5,715,000			$ 6,520,000
Amortization of debt issuance costs				3,839,000	$ 3,990,000
Bond repurchase program, authorized amount								$ 75,000,000
Interest Expense
Debt Instrument [Line Items]
Amortization of debt issuance costs		1,000,000	$ 1,000,000	4,000,000	$ 4,000,000
RBL Facility \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt issuance costs		$ 5,000,000		$ 5,000,000			7,000,000
Value of proven oil and gas reserves serving as collateral (at least)		85.00%		85.00%
2021 RBL Facility \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Legal and bank fees		$ 3,000,000
Maximum borrowing capacity	$ 500,000,000
Borrowing base elected	$ 200,000,000
Maximum borrowing capacity exceed, remediation period (within)	30 days
Maximum borrowing capacity exceed, cure deficiency period (within)	6 months
Consolidated cash balance trigger to prepay borrowing	$ 20,000,000
Unused availability fee	0.50%
Leverage ratio (no more than)	3.0
Current ratio (at least)	1.0
Leverage ratio at period end		2.1		2.1
Current ratio at period end		2.4		2.4
Reduction in borrowing base if unsecured indebtedness is incurred	25.00%
Minimum availability of borrowing base required which will permit repurchase of equity and indebtedness	20.00%
Maximum pro forma leverage ratio allowable which will permit repurchase of equity and indebtedness	2.0
Value of proven oil and gas reserves serving as collateral (at least)		90.00%		90.00%
Borrowings outstanding		$ 0		$ 0
Available borrowing capacity		200,000,000		200,000,000
Minimum availability of borrowing base or elected commitment required which will permit dividends	20.00%
2021 RBL Facility \| Line of Credit \| Revolving Credit Facility \| Base Rate \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
2021 RBL Facility \| Line of Credit \| Revolving Credit Facility \| Base Rate \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
2021 RBL Facility \| Line of Credit \| Revolving Credit Facility \| Benchmark Rate \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
2021 RBL Facility \| Line of Credit \| Revolving Credit Facility \| Benchmark Rate \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	4.00%
2021 RBL Facility \| Line of Credit \| Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 20,000,000
2026 Notes \| Unsecured Debt
Debt Instrument [Line Items]
Fair value of debt		409,000,000		409,000,000			$ 337,000,000
2017 RBL Facility \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Unamortized debt issuance costs expensed		$ 3,000,000		$ 3,000,000
Maximum borrowing capacity									$ 1,500,000,000
Borrowing base elected						$ 200,000,000
Borrowings outstanding						$ 0