CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ (16,629)	$ (11,044)	$ 102,166	$ 70,309
Other comprehensive income (loss):
Unrealized gain on pension plan obligation	434	317	1,298	955
Tax effect of unrealized gain on pension plan obligation	(116)	(80)	(344)	(240)
Unrealized gain on captive insurance collateral	202	401	373	1,596
Tax effect of unrealized gain on captive insurance collateral	(42)	(84)	(78)	(336)
Unrealized loss on interest rate hedges	(316)	(186)	(319)	(1,007)
Tax effect of unrealized loss on interest rate hedges	82	50	83	270
Total other comprehensive income	244	418	1,013	1,238
Total comprehensive income (loss)	$ (16,385)	$ (10,626)	$ 103,179	$ 71,547