Long-Term Debt (Details) $ in Thousands			3 Months Ended
	Nov. 29, 2021 USD ($)	Nov. 12, 2021 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Apr. 12, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 15, 2017 USD ($)
Bank Borrowings
Long-term Debt, excluding current maturities			$ 346,003			$ 372,825
Second Lien [Abstract]
Long-term debt, gross			$ 350,000			377,000
Discount Rate for Estimated Future Net Revenues from Proved Properties			10.00%
Gross interest expense including amortization of debt issuance costs			$ 6,557	$ 7,019
New Credit Facility [Member]
Bank Borrowings
Debt Issuance Costs, Net			3,300			3,600
Second Lien Notes [Member]
Bank Borrowings
Debt Issuance Costs, Net			2,981			3,114
Long-term Debt, excluding current maturities			150,000			150,000	$ 198,000
Second Lien [Abstract]
Long-term debt, gross		$ 150,000					200,000
Debt Instrument, Unamortized Discount			(1,016)			(1,061)	$ (2,000)
Repayments of Long-Term Debt	$ 50,000
Professional Fees	$ 100
Additional interest in the event of default		0.020
Make whole premium during year 4		0.010
Second Lien, Required Security Interest on Proved Reserves		90.00%
Second Lien, Required Security Interest on Oil and Gas Properties		90.00%
Discount Rate for Estimated Future Net Revenues for Proved Properties at 9%		9.00%
Second Lien, Asset Coverage Ratio, Minimum		1.25
Second Lien, Covenant, Debt to EBITDA Ratio, On or Before December 31, 2021		3.5
Second Lien, Debt to EBITDA Ratio, after March 31, 2022		3.25
Long-term debt, net			146,000
Gross interest expense including amortization of debt issuance costs			3,400	4,500
Second Lien Notes [Member] | London Interbank Offered Rate (LIBOR) [Member]
Bank Borrowings
Debt instrument escalating basis spread on base rate		0.075
Second Lien Notes [Member] | Alternative Base Interest Rate [Member]
Bank Borrowings
Debt instrument escalating basis spread on base rate		0.065
Line of Credit [Member] | New Credit Facility [Member]
Bank Borrowings
Long-term Debt, excluding current maturities			200,000			$ 227,000
Line of Credit Facility, Current Borrowing Capacity		$ 460,000
Line of Credit, Covenant, Debt to EBITDA Ratio, On or Before December 31, 2021		3.25
Line of Credit, Covenant, Debt to EBITDA Ratio, On or Before March 31, 2022		3.00
Line of Credit, Required Security Interest on Oil and Gas Properties		90.00%
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,000,000
Line of Credit, Letters of Credit Issuable		$ 25,000
Commitment fee basis points for the credit facility		0.50%
Line of Credit, Additional Interest Due to Payment Default		2.00%
Line of Credit, Covenant, Current Ratio, Minimum		1.00
Line of Credit Facility, Commitment Fee Amount			300	100
Second Lien [Abstract]
Gross interest expense including amortization of debt issuance costs			$ 3,200	$ 2,500
Line of Credit [Member] | New Credit Facility [Member] | Subsequent Event [Member]
Bank Borrowings
Line of Credit Facility, Current Borrowing Capacity					$ 525,000
Line of Credit [Member] | New Credit Facility [Member] | Minimum [Member] | Alternative Base Interest Rate [Member]
Bank Borrowings
Debt instrument escalating basis spread on base rate		0.0225
Debt Instrument Escalating Rates for Eurodollar Rate Loans		0.0325
Line of Credit [Member] | New Credit Facility [Member] | Maximum [Member] | Alternative Base Interest Rate [Member]
Bank Borrowings
Debt instrument escalating basis spread on base rate		0.0325
Debt Instrument Escalating Rates for Eurodollar Rate Loans		0.0425