Derivative Instruments (Tables)

12 Months Ended

Sep. 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 September 30, 2021, related to oil and natural gas production:

		Weighted Average Price
Calendar Quarter	Notional Volume	Fixed		Put		Call
		($ per unit)
Oil Swaps (Bbl)
Q4 2021	558,116	$	51.65	$	—	$	—
Q1 2022	405,000	$	55.66	$	—	$	—
Q2 2022	405,000	$	55.66	$	—	$	—
Q3 2022	330,000	$	54.07	$	—	$	—
Q4 2022	330,000	$	54.07	$	—	$	—
2023	360,000	$	59.01	$	—	$	—
Natural Gas Swaps (Mcf)
Q4 2021	555,000	$	3.03	$	—	$	—
Q1 2022	540,000	$	3.26	$	—	$	—
Q2 2022	540,000	$	3.26	$	—	$	—
Q3 2022	540,000	$	3.26	$	—	$	—
Q4 2022	540,000	$	3.26	$	—	$	—
Oil Collars (Bbl)
Q1 2022	90,000	$	—	$	35.00	$	42.63
Q2 2022	90,000	$	—	$	35.00	$	42.63
Q3 2022	90,000	$	—	$	35.00	$	42.63
Q4 2022	90,000	$	—	$	35.00	$	42.63
Oil Basis (Bbl)
Q4 2021	435,000	$	0.40	$	—	$	—
Q1 2022	180,000	$	0.40	$	—	$	—
Q2 2022	180,000	$	0.40	$	—	$	—
Q3 2022	180,000	$	0.40	$	—	$	—
Q4 2022	180,000	$	0.40	$	—	$	—

The following table summarizes the open interest rate derivative positions as of September 30, 2021:

Open Coverage Period	Notional Amount		Fixed Rate
	(In thousands)
Floating-to-Fixed Interest Rate Swaps
October 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 consolidated balance sheets as of September 30, 2021 and 2020:

	September 30, 2021
Balance Sheet Classification	Gross Fair Value		Amounts Netted		Net Fair Value
	(In thousands)
Current derivative assets	$	186	$	(186)	$	—
Non-current derivative assets	228		(122)		106
Current derivative liabilities	(42,330)		186		(42,144)
Non-current derivative liabilities	(9,054)		122		(8,932)
Total	$	(50,970)	$	—	$	(50,970)
	September 30, 2020
Balance Sheet Classification	Gross Fair Value		Amounts Netted		Net Fair Value
	(In thousands)
Current derivative assets	$	19,690	$	(871)	$	18,819
Non-current derivative assets	4,651		(1,549)		3,102
Current derivative liabilities	(871)		871		—
Non-current derivative liabilities	(1,549)		1,549		—
Total	$	21,921	$	—	$	21,921

Schedule of Changes in Derivatives, net

The following table presents the Company's derivative activities for the years ended September 30, 2021 and 2020:

	Year Ended September 30,
	2021		2020
	(In thousands)
Fair value of net asset (liability), beginning of period	$	21,921	$	14,959
Gain (loss) on derivatives	(89,195)		33,876
Settlements on derivatives	16,304		(26,914)
Fair value of net asset (liability), end of period	$	(50,970)	$	21,921