Other Financial Data - Schedule of Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 29, 2024	Jun. 30, 2024
Receivables, net:
Customer receivables	$ 79,089	$ 80,050
Allowance for uncollectible accounts	(3,036)	(2,713)
Reserves for quality claims	(835)	(745)
Net customer receivables	75,218	76,592
Banker's acceptance notes	1,632	1,326
Other receivables	1,035	1,247
Total receivables, net	77,885	79,165
Inventories:
Raw materials	57,696	49,391
Supplies	12,206	12,160
Work in process	8,696	8,994
Finished goods	70,122	64,449
Gross inventories	148,720	134,994
Net realizable value adjustment	(3,370)	(3,813)
Total inventories	145,350	131,181
Other current assets:
Assets held for sale	3,798	3,781
Vendor deposits	3,579	2,633
Prepaid expenses and other	2,554	2,133
Value-added taxes receivable	2,454	2,510
Contract assets	538	561
Total other current assets	12,923	11,618
Property, plant and equipment, net:
Gross property, plant and equipment	892,410	889,144
Less: accumulated depreciation	(694,857)	(688,086)
Less: accumulated amortization – finance leases	(7,809)	(7,335)
Total property, plant and equipment, net	189,744	193,723
Other non-current assets:
Recovery of taxes	5,794	5,543
Grantor trust	2,147	2,942
Investments in unconsolidated affiliates	1,599	1,603
Intangible assets, net	655	682
Other	2,257	2,181
Total other non-current assets	12,452	12,951
Other current liabilities:
Payroll and fringe benefits	8,978	7,140
Utilities	2,612	2,861
Incentive compensation	1,798	1,450
Deferred revenue	1,500	1,504
Property taxes, interest and other	4,035	4,707
Total other current liabilities	18,923	17,662
Other long-term liabilities:
Nonqualified deferred compensation plan obligation	2,175	2,008
Uncertain tax positions	1,161	1,109
Other	379	390
Total other long-term liabilities	3,715	3,507
Land
Property, plant and equipment, net:
Gross property, plant and equipment	1,904	1,897
Land Improvements
Property, plant and equipment, net:
Gross property, plant and equipment	16,409	16,409
Building and Building Improvements
Property, plant and equipment, net:
Gross property, plant and equipment	162,840	162,414
Assets Held Under Finance Leases
Property, plant and equipment, net:
Gross property, plant and equipment	18,030	18,030
Machinery and Equipment
Property, plant and equipment, net:
Gross property, plant and equipment	653,378	650,901
Computers Software And Office Equipment
Property, plant and equipment, net:
Gross property, plant and equipment	25,744	25,464
Transportation Equipment
Property, plant and equipment, net:
Gross property, plant and equipment	10,755	10,710
Asset under Construction
Property, plant and equipment, net:
Gross property, plant and equipment	$ 3,350	$ 3,319