Derivatives (Summary Of Derivative Instruments Contracts) (Details)	Sep. 30, 2023 MMBTU $ / MMBTU $ / bbl bbl
Natural Gas Costless Collars [Member] | 2023 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	225,000
Natural Gas Costless Collars [Member] | 2023 [Member] | Minimum [Member]
Derivative [Line Items]
Contract average price	3.23
Natural Gas Costless Collars [Member] | 2023 [Member] | Maximum [Member]
Derivative [Line Items]
Contract average price	5.47
Natural Gas Costless Collars [Member] | 2024 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	1,455,000
Natural Gas Costless Collars [Member] | 2024 [Member] | Minimum [Member]
Derivative [Line Items]
Contract average price	3.57
Natural Gas Costless Collars [Member] | 2024 [Member] | Maximum [Member]
Derivative [Line Items]
Contract average price	5.58
Natural Gas Costless Collars [Member] | 2025 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	540,000
Natural Gas Costless Collars [Member] | 2025 [Member] | Minimum [Member]
Derivative [Line Items]
Contract average price	3.21
Natural Gas Costless Collars [Member] | 2025 [Member] | Maximum [Member]
Derivative [Line Items]
Contract average price	5.15
Natural Gas Fixed Price Swaps [Member] | 2023 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	565,000
Contract average price	3.39
Natural Gas Fixed Price Swaps [Member] | 2024 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	2,172,500
Contract average price	3.4
Natural Gas Fixed Price Swaps [Member] | 2025 [Member]
Derivative [Line Items]
Contract total volume | MMBTU	180,000
Contract average price	4.16
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	74.79
Contract total volume | bbl	19,750
Oil Fixed Price Swaps [Member] | 2024 [Member]
Derivative [Line Items]
Contract average price | $ / bbl	67.69
Contract total volume | bbl	16,350
Oil Fixed Price Swaps [Member] | 2025 [Member]
Derivative [Line Items]
Contract average price | $ / bbl	66.03
Contract total volume | bbl	7,800