Property, Plant and Equipment, Net - PP&E Net Components (Details) - USD ($) $ in Thousands	Jun. 28, 2020	Jun. 30, 2019
Property Plant And Equipment [Line Items]
Gross PP&E	$ 848,312	$ 851,103
Less: accumulated depreciation	(636,221)	(636,135)
Less: accumulated amortization – finance leases	(7,845)	(8,181)
Total PP&E, net	204,246	206,787
Land [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	3,154	3,138
Land Improvements [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	16,344	15,249
Buildings and Improvements [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	158,025	161,566
Assets under Finance Leases [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	29,857	31,897
Machinery and Equipment [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	602,867	603,950
Computers, Software and Office Equipment [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	22,677	23,011
Transportation Equipment [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	7,806	5,809
Construction in Progress [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	$ 7,582	$ 6,483

Less: accumulated amortization – finance leases.

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