Property, Plant and Equipment, Net - Property, Plant and Equipment Components (Details) - USD ($) $ in Thousands	Dec. 29, 2019	Jun. 30, 2019
Property Plant And Equipment [Line Items]
Gross PP&E	$ 853,452	$ 851,103
Less: accumulated depreciation	(636,910)	(636,135)
Less: accumulated amortization – finance leases	(7,292)	(8,181)
Total PP&E, net	209,250	206,787
Land [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	3,273	3,138
Land Improvements [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	15,511	15,249
Buildings and Improvements [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	161,388	161,566
Assets under Finance Leases [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	33,025	31,897
Machinery and Equipment [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	607,166	603,950
Computers, Software and Office Equipment [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	22,602	23,011
Transportation Equipment [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	5,927	5,809
Construction in Progress [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	$ 4,560	$ 6,483

Less: accumulated amortization – finance leases.

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