Property, Plant and Equipment, Net - Property, Plant and Equipment Components (Details) - USD ($) $ in Thousands	Sep. 29, 2019	Jun. 30, 2019
Property Plant And Equipment [Line Items]
Gross PP&E	$ 851,667	$ 851,103
Less: accumulated depreciation	(639,679)	(636,135)
Less: accumulated amortization – finance leases	(6,614)	(8,181)
Total PP&E, net	205,374	206,787
Land [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	3,100	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	160,581	161,566
Assets under Finance Leases [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	27,601	31,897
Machinery and Equipment [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	610,057	603,950
Computers, Software and Office Equipment [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	22,429	23,011
Transportation Equipment [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	5,838	5,809
Construction in Progress [Member]
Property Plant And Equipment [Line Items]
Gross PP&E	$ 6,550	$ 6,483

Less: accumulated amortization – finance leases.

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