Employee Benefit Plans - Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2024
Pension Plan
Components of net periodic benefit cost
Interest cost	$ 665	$ 1,216
Expected return on plan assets	(550)	(1,161)
Amortization of net loss (gain)	62	149
Net periodic benefit cost	$ 177	204
Weighted average assumptions used to determine benefit obligations
Discount rate	5.45%		5.35%
Expected long-term return on plan assets	7.00%		7.00%
Contributions to WCTPP
Weighted average assumptions used to determine benefit obligations
Contributions made by the Company to the multiemployer pension plans	$ 360	371
Contributions to All Other Plans
Weighted average assumptions used to determine benefit obligations
Contributions made by the Company to the multiemployer pension plans	$ 16	$ 10