Accumulated Other Comprehensive Income- Schedule of Balances of Each Component (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income
Balance at the beginning of the period	$ 217,371	$ 230,519	$ 213,536	$ 239,670
Other comprehensive income (loss) before reclassifications	313	558	1,068	493
Reclassification to (earnings) loss	(333)	(44)	(557)	(102)
Net current-period other comprehensive income (loss)	(20)	514	511	391
Balance at the end of the period	177,201	206,664	177,201	206,664
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income
Balance at the beginning of the period	4,297	1,857	3,766	1,980
Balance at the end of the period	4,277	2,371	4,277	2,371
Postemployment Benefits Net Actuarial Gain (Loss)
Accumulated Other Comprehensive Income
Balance at the beginning of the period	2,264	2,075	2,291	1,980
Other comprehensive income (loss) before reclassifications	181	222	277	418
Reclassification to (earnings) loss	(124)	(100)	(247)	(201)
Net current-period other comprehensive income (loss)	57	122	30	217
Balance at the end of the period	2,321	2,197	2,321	2,197
Interest Rate Swap Gain (Loss)
Accumulated Other Comprehensive Income
Balance at the beginning of the period	2,033	(218)	1,475	0
Other comprehensive income (loss) before reclassifications	132	336	791	75
Reclassification to (earnings) loss	(209)	56	(310)	99
Net current-period other comprehensive income (loss)	(77)	392	481	174
Balance at the end of the period	$ 1,956	$ 174	$ 1,956	$ 174