LEASES - Right-of-use lease assets and lease liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Sep. 30, 2024
Right-of-use lease assets and lease liabilities
Operating ROU assets, net	$ 44,930	$ 49,165
Current portion of operating lease liabilities	8,845	11,774
Long-term operating lease liabilities	40,085	40,010
Total lease liability	48,930	51,784
Finance ROU assets, net	2,734	652
Current portion of long-term finance lease	426	211
Long-term finance leases	2,316	433
Total finance lease liabilities	$ 2,742	$ 644