Derivatives (Summary Of Derivative Instruments Contracts) (Details)	Mar. 31, 2022 MMBTU $ / MMBTU $ / bbl bbl
Natural Gas Costless Collars [Member] | Remaining 2022 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	480,000
Natural Gas Costless Collars [Member] | Remaining 2022 [Member] | Minimum [Member]
Derivative [Line Items]
Contract average price	3.50
Natural Gas Costless Collars [Member] | Remaining 2022 [Member] | Maximum [Member]
Derivative [Line Items]
Contract average price	4.23
Natural Gas Costless Collars [Member] | 2023 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	500,000
Natural Gas Costless Collars [Member] | 2023 [Member] | Minimum [Member]
Derivative [Line Items]
Contract average price	3.32
Natural Gas Costless Collars [Member] | 2023 [Member] | Maximum [Member]
Derivative [Line Items]
Contract average price	4.54
Natural Gas Costless Collars [Member] | 2024 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	60,000
Natural Gas Costless Collars [Member] | 2024 [Member] | Minimum [Member]
Derivative [Line Items]
Contract average price	3.00
Natural Gas Costless Collars [Member] | 2024 [Member] | Maximum [Member]
Derivative [Line Items]
Contract average price	4.70
Natural Gas Fixed Price Swaps [Member] | Remaining 2022 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	1,785,000
Contract average price	2.98
Natural Gas Fixed Price Swaps [Member] | 2023 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	2,100,000
Contract average price	3.24
Natural Gas Fixed Price Swaps [Member] | 2024 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	380,000
Contract average price	3.41
Oil Fixed Price Swaps [Member] | Remaining 2022 [Member]
Derivative [Line Items]
Contract average price | $ / bbl	44.91
Contract total volume | bbl	76,500
Oil Fixed Price Swaps [Member] | 2023 [Member]
Derivative [Line Items]
Contract average price | $ / bbl	62.11
Contract total volume | bbl	66,750
Oil Fixed Price Swaps [Member] | 2024 [Member]
Derivative [Line Items]
Contract average price | $ / bbl	73.35
Contract total volume | bbl	11,250