Employee Benefit Plans - Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Pension Plan
Components of net periodic benefit cost
Interest cost	$ 1,204	$ 1,156	$ 3,612	$ 3,468
Expected return on plan assets	(1,122)	(1,009)	(3,366)	(3,027)
Amortization of net loss (gain)	207	281	620	844
Net periodic benefit cost	289	428	$ 866	$ 1,285
Weighted average assumptions used to determine benefit obligations
Discount rate			5.05%	4.50%
Expected long-term return on plan assets			7.00%	6.50%
Multiemployer Plan
Weighted average assumptions used to determine benefit obligations
Contributions made by the Company to the multiemployer pension plans	272	313	$ 944	$ 978
Other Postretirement Benefit Plan
Weighted average assumptions used to determine benefit obligations
Contributions made by the Company to the multiemployer pension plans	$ 9	$ 6	$ 27	$ 22