Goodwill and intangible assets Intangible Assets (Details) - USD ($) $ in Thousands	Apr. 02, 2016	Jun. 27, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Acquired Amount	$ 296,120	$ 295,470
Accumulated Amortization	(209,131)	(195,739)
Net Book Value	86,989	99,731
Customer Related [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Acquired Amount	278,448	276,921
Accumulated Amortization	(202,575)	(190,593)
Net Book Value	75,873	86,328
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Acquired Amount	4,973	6,240
Accumulated Amortization	(2,649)	(3,792)
Net Book Value	2,324	2,448
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Acquired Amount	12,699	12,309
Accumulated Amortization	(3,907)	(1,354)
Net Book Value	$ 8,792	$ 10,955