Property, Plant and Equipment, Net - Property, Plant and Equipment Components (Details) - USD ($) $ in Thousands	Dec. 26, 2021	Jun. 27, 2021
Property Plant And Equipment [Line Items]
Gross PP&E	$ 874,456	$ 864,235
Less: accumulated depreciation	(660,021)	(656,576)
Less: accumulated amortization – finance leases	(6,974)	(5,963)
Total PP&E, net	207,461	201,696
Land [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	3,143	3,184
Land Improvements [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	16,396	16,372
Buildings and Improvements [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	159,215	160,122
Assets under Finance Leases [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	22,882	22,000
Machinery and Equipment [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	615,560	609,414
Computers, Software and Office Equipment [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	25,033	24,848
Transportation Equipment [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	10,527	10,461
Construction in Progress [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	$ 21,700	$ 17,834

Less: accumulated amortization – finance leases.

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