Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Fair value, liabilities measured on recurring basis

The following table presents the Company’s assets and liabilities measured at fair value on a recurring basis as of September 30, 2023 and 2022 under Topic 820 (in thousands):

	Fair Value Measurement at Reporting Date Using
September 30, 2023	Level 1		Level 2		Level 3
Assets:
Commodity swap contracts	$	—	$	204	$	—
Interest rate swaps	—		26,909		—
Corporate debt securities	—		5,605		—
U.S. government securities	—		6,549		—
Municipal government securities	—		1,748		—
Other debt securities	—		1,177		—
Total Assets	$	—	$	42,192	$	—
Liabilities:
Commodity swap contracts	$	—	$	20	$	—
Total Liabilities	$	—	$	20	$	—

	Fair Value Measurement at Reporting Date Using
September 30, 2022	Level 1		Level 2		Level 3
Assets:
Commodity swap contracts	$	—	$	1,187	$	—
Interest rate swaps	—		24,719		—
Corporate debt securities	—		2,537		—
U.S. government securities	—		2,481		—
Municipal government securities	—		1,055		—
Other debt securities	—		793		—
Total Assets	$	—	$	32,772	$	—
Liabilities:
Commodity swap contracts	$	—	$	661	$	—
Total Liabilities	$	—	$	661	$	—