Derivatives (Summary Of Derivative Instruments Contracts) (Details)	Sep. 30, 2022 MMBTU $ / MMBTU $ / bbl bbl
Natural Gas Costless Collars [Member] | 2023
Derivative [Line Items]
Contract total volume | MMBTU	1,415,000
Natural Gas Costless Collars [Member] | 2024
Derivative [Line Items]
Contract total volume | MMBTU	135,000
Natural Gas Fixed Price Swaps [Member] | 2023
Derivative [Line Items]
Contract total volume | MMBTU	2,100,000
Contract average price	3.24
Natural Gas Fixed Price Swaps [Member] | 2024
Derivative [Line Items]
Contract total volume | MMBTU	380,000
Contract average price	3.41
Oil Costless Collars [Member] | 2023
Derivative [Line Items]
Contract total volume | bbl	15,000
Oil Fixed Price Swaps [Member] | 2023
Derivative [Line Items]
Contract average price | $ / bbl	63.65
Contract total volume | bbl	72,750
Oil Fixed Price Swaps [Member] | 2024
Derivative [Line Items]
Contract average price | $ / bbl	74.91
Contract total volume | bbl	14,250
Maximum [Member] | Natural Gas Costless Collars [Member] | 2023
Derivative [Line Items]
Contract average price	7.69
Maximum [Member] | Natural Gas Costless Collars [Member] | 2024
Derivative [Line Items]
Contract average price	5.98
Maximum [Member] | Oil Costless Collars [Member] | 2023
Derivative [Line Items]
Contract average price | $ / bbl	96.00
Minimum [Member] | Natural Gas Costless Collars [Member] | 2023
Derivative [Line Items]
Contract average price	4.13
Minimum [Member] | Natural Gas Costless Collars [Member] | 2024
Derivative [Line Items]
Contract average price	3.28
Minimum [Member] | Oil Costless Collars [Member] | 2023
Derivative [Line Items]
Contract average price | $ / bbl	75.00