Leases (Tables)

12 Months Ended

Sep. 30, 2023

Leases [Abstract]

Components of Operating and Financing Lease Costs

The components of our operating and finance lease costs were as follows (in thousands):

	Year Ended September 30,
	2023		2022
Operating lease costs	$	8,517	$	37,637
Variable and short-term lease costs		3,691		5,783
Interest expense on finance lease liabilities		4,492	547
Amortization expense of finance lease assets		13,414		2,705
Total lease costs	$	30,114	$	46,672

Schedule of Weighted Average Remaining Terms and Discount Rates for Operating and Financing Leases

The table below presents the weighted average remaining terms and discount rates for our operating and finance leases as of September 30, 2023:

As of September 30, 2023
Finance leases:
Weighted average remaining lease term	2.17
Weighted average discount rate		3.4	%
Operating leases:
Weighted average remaining lease term	6.1
Weighted average discount rate		5.6	%

Schedule of Future Minimum Rental Payments Under Operating and Finance Leases of Initial or Remaining Non-cancelable Lease Terms

The following table summarizes future minimum rental payments, primarily related to leased aircraft, required under operating and finance leases that had initial or remaining non-cancelable lease terms as of September 30, 2023 (in thousands):

Periods Ending September 30,	Operating Leases			Finance Leases
2024	$	4,243		$	57,704
2025		2,449			1,257
2026		1,520			1,332
2027		1,437			1,411
2028		1,030			1,495
Thereafter		4,161			4,437
Total lease payments		14,840			67,636
Less: imputed interest		(3,253	)		—
Amounts recorded in the consolidated balance sheet	$	11,587		$	67,636