Goodwill and intangible assets Intangible Assets (Details) - USD ($) $ in Thousands	Jul. 02, 2016	Jun. 27, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Acquired Amount	$ 228,400	$ 295,470
Accumulated Amortization	(150,003)	(195,739)
Net Book Value	78,397	99,731
Customer Related [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Acquired Amount	211,169	276,921
Accumulated Amortization	(142,994)	(190,593)
Net Book Value	68,175	86,328
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Acquired Amount	4,875	6,240
Accumulated Amortization	(2,731)	(3,792)
Net Book Value	2,144	2,448
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Acquired Amount	12,356	12,309
Accumulated Amortization	(4,278)	(1,354)
Net Book Value	$ 8,078	$ 10,955