Derivatives (Summary Of Derivative Instruments Contracts) (Details)	Mar. 31, 2023 MMBTU $ / MMBTU $ / bbl bbl
Natural Gas Costless Collars [Member] | 2023 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	780,000
Natural Gas Costless Collars [Member] | 2023 [Member] | Minimum [Member]
Derivative [Line Items]
Contract average price	3.38
Natural Gas Costless Collars [Member] | 2023 [Member] | Maximum [Member]
Derivative [Line Items]
Contract average price	6.47
Natural Gas Costless Collars [Member] | 2024 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	755,000
Natural Gas Costless Collars [Member] | 2024 [Member] | Minimum [Member]
Derivative [Line Items]
Contract average price	3.96
Natural Gas Costless Collars [Member] | 2024 [Member] | Maximum [Member]
Derivative [Line Items]
Contract average price	6.51
Natural Gas Fixed Price Swaps [Member] | 2023 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	1,220,000
Contract average price	3.42
Natural Gas Fixed Price Swaps [Member] | 2024 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	300,000
Contract average price	3.47
Oil Costless Collars [Member] | 2023 [Member]
Derivative [Line Items]
Contract total volume | bbl	10,000
Oil Costless Collars [Member] | 2023 [Member] | Minimum [Member]
Derivative [Line Items]
Contract average price | $ / bbl	75.00
Oil Costless Collars [Member] | 2023 [Member] | Maximum [Member]
Derivative [Line Items]
Contract average price | $ / bbl	96.00
Oil Costless Collars [Member] | 2024 [Member]
Derivative [Line Items]
Contract total volume | bbl	23,450
Oil Costless Collars [Member] | 2024 [Member] | Minimum [Member]
Derivative [Line Items]
Contract average price | $ / bbl	64.11
Oil Costless Collars [Member] | 2024 [Member] | Maximum [Member]
Derivative [Line Items]
Contract average price | $ / bbl	76.28
Oil Fixed Price Swaps [Member] | 2023 [Member]
Derivative [Line Items]
Contract average price | $ / bbl	74.55
Contract total volume | bbl	47,500