Derivative Contracts Schedule Of Commodity Derivative Contracts (Details) MMBTU in Millions	9 Months Ended
	Sep. 30, 2020 USD ($) MMBTU $ / MMBTU $ / bbl
Oil Swaps [Member] | Year 2020 [Member] | NYMEX WTI [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	3.9
Average Swap Price per Unit | $	$ 57.60
Oil Swaps [Member] | Year 2020 [Member] | Argus WTI Midland [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	0.4
Average Swap Price per Unit | $	$ 57.30
Oil Swaps [Member] | Year 2021 January - June [Member] | NYMEX WTI [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	5.0
Average Swap Price per Unit | $	$ 44.78
Oil Swaps [Member] | Year 2021 July - December [Member] | NYMEX WTI [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	5.0
Average Swap Price per Unit | $	$ 42.22
Oil Basis Swaps [Member] | Year 2020 [Member] | NYMEX WTI less Argus WTI Midland [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	1.8
Weighted-Average Differential | $ / MMBTU	0.22
Oil Basis Swaps [Member] | Year2021 [Member] | NYMEX WTI less Argus WTI Midland [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	4.4
Weighted-Average Differential | $ / MMBTU	0.99
Gas Swaps [Member] | Year 2020 [Member] | IF Waha [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	3.7	[1]
Average Swap Price per Unit | $	$ 0.97	[1]
Gas Swaps [Member] | Year 2020 [Member] | NYMEX HH [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	2.8
Average Swap Price per Unit | $	$ 2.20
Gas Swaps [Member] | Year2021 [Member] | IF Waha [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	18.2	[1]
Average Swap Price per Unit | $	$ 1.92	[1]
Gas Swaps [Member] | Year2021 [Member] | NYMEX HH [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	9.1
Average Swap Price per Unit | $	$ 2.44
Costless Oil Collars [Member] | Year2021 [Member] | NYMEX WTI [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	0.4
Derivative, Average Floor Price | $ / bbl	40.00
Derivative, Average Cap Price | $ / bbl	49.20

[1] IF Waha Index pricing reported in Platts' Inside FERC's Gas Market Report, reflects the weighted average price of Natural Gas transactions at the Waha Hub in west Texas on the first day of the month.