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Derivative Instruments (Tables)
 9 Months Ended
Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Notional Amounts of Outstanding Derivative Positions The following table summarizes the open financial derivative positions as of June 30, 2021, related to crude oil and natural gas production.
Weighted Average Price
Calendar QuarterNotional VolumeFixedPutCall
($ per unit)
Crude Oil Swaps (Bbl)
Q3 2021564,278 $51.57 $— $— 
Q4 2021558,116 $51.65 $— $— 
20221,320,000 $53.59 $— $— 
2023360,000 $59.01 $— $— 
Natural Gas Swaps (Mcf)
Q3 2021555,000 $3.03 $— $— 
Q4 2021555,000 $3.03 $— $— 
Crude Oil Collars (Bbl)
2022360,000 $— $35.00 $42.63 
Crude Oil Basis (Bbl)
Q3 2021435,000 $0.40 $— $— 
Q4 2021435,000 $0.40 $— $— 
2022720,000 $0.40 $— $— 
The following table summarizes the open interest rate derivative positions as of June 30, 2021:
Open Coverage PeriodNotional AmountFixed Rate
(In thousands)
Floating-to-Fixed Interest Rate Swaps
July 2021 - September 2021$40,000 1.77 %
July 2021 - September 2021$15,000 0.71 %
September 2021 - September 2023$40,000 0.24 %
Schedule of Derivative Instruments Location and Fair Value
The following table presents the location and fair value of the Company’s derivative contracts included in the accompanying consolidated balance sheets as of June 30, 2021 and September 30, 2020.
June 30, 2021
Balance Sheet ClassificationGross Fair ValueAmounts NettedNet Fair Value
(In thousands)
Current derivative assets$533 $(307)$226 
Non-current derivative assets402 (295)107 
Current derivative liabilities(36,558)307 (36,251)
Non-current derivative liabilities(11,531)295 (11,236)
Total$(47,154)$— $(47,154)
September 30, 2020
Balance Sheet ClassificationGross Fair ValueAmounts NettedNet Fair Value
(In thousands)
Current derivative assets$19,690 $(871)$18,819 
Non-current derivative assets4,651 (1,549)3,102 
Current derivative liabilities(871)871 — 
Non-current derivative liabilities(1,549)1,549 — 
Total$21,921 $— $21,921 
Schedule of Derivative Instruments, Gain (Loss)
The following table presents the Company's derivative activities for the three and nine months ended June 30, 2021 and 2020:
Three Months Ended June 30,Nine Months Ended June 30,
2021202020212020
(In thousands)
Fair value of net asset (liability),
    beginning of period		$(19,470)$60,671 $21,921 $14,959 
Gain (loss) on derivatives(35,396)(14,205)(74,208)36,999 
Settlements on derivative contracts7,712 (14,669)5,133 (20,161)
Fair value of net asset (liability),
    end of period		$(47,154)$31,797 $(47,154)$31,797