LEASES - Summary of Lease Assets and Lease Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Leases [Abstract]
Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List	Other assets	Other assets
Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List	Other assets	Other assets
ROU operating lease assets	$ 22,881	$ 15,423
Finance lease assets	79,916	71,529
Total lease assets	$ 102,797	$ 86,952
Operating Lease Liability Current Statement Of Financial Position Extensible List	Accrued expenses and other liabilities	Accrued expenses and other liabilities
Finance Lease Liability Current Statement Of Financial Position Extensible List	Accrued Liabilities and Other Liabilities	Accrued Liabilities and Other Liabilities
Liabilities, Current, Operating	$ 4,547	$ 4,180
Liabilities, Current, Finance	$ 3,639	$ 2,777
Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List	Other non-current liabilities	Other non-current liabilities
Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List	Other non-current liabilities	Other non-current liabilities
Liabilities, Non-current, Operating	$ 20,675	$ 13,699
Liabilities, Non-current, Finance	85,496	75,718
Total lease liabilities	$ 114,357	$ 96,374