Long-Term Debt (Details) $ in Thousands			12 Months Ended
	Nov. 29, 2021 USD ($)	Nov. 12, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Apr. 16, 2021 USD ($)	Dec. 15, 2017 USD ($)
Bank Borrowings
Long-Term Debt, excluding current maturities			$ 372,825	$ 424,905
Interest expense including commitment fees and amortization of debt issuance costs relating to the credit facility			29,129	31,228
Second Lien
Long-term Debt, Gross			377,000	430,000
Payments of long-term debt	$ (50,000)		$ (50,000)	0
Professional Fees		$ 100
Discount Rate for Estimated Future Net Revenues from Proved Properties			10.00%
New Credit Facility [Member]
Bank Borrowings
Debt Issuance Costs, Net			$ (3,600)	(1,400)
New Credit Facility [Member] | Line of Credit [Member]
Bank Borrowings
Long-Term Debt, excluding current maturities			227,000	230,000
Line of Credit, current borrowing base		460,000			$ 300,000
Line of Credit Facility, Maximum Borrowing Capacity		1,000,000
Line of Credit, Letters of Credit Issuable		$ 25,000
Line of Credit Facility, Commitment Fee Percentage		0.50%
Line of Credit, Additional Interest Due to Payment Default		2.00%
Line of Credit, Required Security Interest on Oil and Gas Properties		90.00%
Line of Credit, Covenant, Debt to EBITDA Ratio, Minimum		3.25
Line of Credit, Covenant, Current Ratio, Minimum		1.0
Interest expense including commitment fees and amortization of debt issuance costs relating to the credit facility			11,300	12,600
Commitment fees included in interest expense, net			500	400
Second Lien
Line of Credit, Covenant, Debt to EBITDA Ratio, after March 31, 2022		3.0
New Credit Facility [Member] | Line of Credit [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 term benchmark loans		0.0325
New Credit Facility [Member] | Line of Credit [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 term benchmark loans		0.0425
Second Lien Notes [Member]
Bank Borrowings
Debt Issuance Costs, Net			(3,114)	(3,800)
Long-Term Debt, excluding current maturities			150,000	200,000		$ 198,000
Interest expense including commitment fees and amortization of debt issuance costs relating to the credit facility			17,800	18,600
Second Lien
Long-term Debt, Gross		$ 150,000				200,000
Debt Instrument, Unamortized Discount			(1,061)	$ (1,295)		$ (2,000)
Additional interest in the event of default		0.020
Make whole premium		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
Discount Rate for Estimated Future Net Revenues from Proved Properties		10.00%
Second Lien, Covenant, Debt to EBITDA Ratio, Minimum		3.5
Second Lien, Debt to EBITDA Ratio, after March 31, 2022		3.25
Long-term Debt			$ 145,800
Second Lien Notes [Member] | Alternative Base Interest Rate [Member]
Bank Borrowings
Debt Instrument escalating basis spread on base rate		0.065
Second Lien Notes [Member] | London Interbank Offered Rate (LIBOR) [Member]
Bank Borrowings
Debt Instrument escalating basis spread on base rate		0.075