Supplementary Information On Oil, NGL And Natural Gas Reserves (Summary of Proved Developed and Undeveloped Reserves) (Details) |
Sep. 30, 2019
bbl
Mcf
|
Sep. 30, 2018
bbl
Mcf
|
Sep. 30, 2017
bbl
Mcf
|
---|---|---|---|
Oil [Member] | |||
Reserve Quantities [Line Items] | |||
Proved Developed Reserves (Volume) | 1,863,096 | 2,334,587 | 2,201,528 |
Proved Undeveloped Reserves (Volume) | 516,994 | 3,649,835 | 3,308,139 |
NGL [Member] | |||
Reserve Quantities [Line Items] | |||
Proved Developed Reserves (Volume) | 1,747,242 | 2,085,706 | 1,768,425 |
Proved Undeveloped Reserves (Volume) | 226,038 | 848,484 | 616,274 |
Natural Gas [Member] | |||
Reserve Quantities [Line Items] | |||
Proved Developed Reserves (Volume) | Mcf | 67,713,193 | 83,151,954 | 87,861,043 |
Proved Undeveloped Reserves (Volume) | Mcf | 12,560,713 | 36,910,082 | 33,334,077 |