Income taxes (Deferred Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jul. 01, 2017
Deferred tax assets:
Federal, state and foreign net operating loss carry-forwards	$ 296,282	$ 269,576
Inventories valuation	26,125	30,330
Receivables valuation	8,332	9,209
Various accrued liabilities and other	39,419	46,922
Deferred tax assets, gross	370,158	356,037
Less - valuation allowance	(239,483)	(241,687)
Deferred tax assets, net	130,675	114,350
Deferred tax liabilities:
Depreciation and amortization of property, plant and equipment	(84,250)	(152,101)
Net deferred tax liabilities		$ (37,751)
Net deferred tax assets	$ 46,425