Income taxes (Deferred Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jun. 29, 2019	Jun. 30, 2018
Deferred tax assets:
Federal, state and foreign net operating loss carry-forwards	$ 241,747	$ 296,282
Depreciation and amortization	1,583
Inventories valuation	28,441	26,125
Receivables valuation	9,138	8,332
Various accrued liabilities and other	41,268	39,419
Deferred tax assets, gross	322,177	370,158
Less - valuation allowance	(231,463)	(239,483)
Deferred tax assets, net	90,714	130,675
Deferred tax liabilities:
Depreciation and amortization		(84,250)
Net deferred tax assets	$ 90,714	$ 46,425