Employee Benefit Plans - Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Pension Plan
Components of net periodic benefit cost
Interest cost	$ 1,204	$ 1,156
Expected return on plan assets	(1,122)	(1,009)
Amortization of net loss (gain)	207	281
Net periodic benefit cost	$ 289	$ 428
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	$ 316	$ 287
Other Postretirement Benefit Plan
Components of net periodic benefit cost
Service cost	0	0
Interest cost	11	10
Amortization of net gain	0	0
Net periodic benefit cost	11	10
Weighted average assumptions used to determine benefit obligations
Contributions made by the Company to the multiemployer pension plans	$ 8	$ 8
Postretirement Life Insurance
Weighted average assumptions used to determine benefit obligations
Discount rate	5.33%	4.77%