Goodwill and intangible assets Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 01, 2016	Jul. 02, 2016
Finite-Lived Intangible Assets [Line Items]
Acquired amount	$ 229,123	$ 228,400
Accumulated amortization	(156,729)	(150,003)
Net book value	72,394	78,397
Customer related
Finite-Lived Intangible Assets [Line Items]
Acquired amount	210,466	211,169
Accumulated amortization	(149,278)	(142,994)
Net book value	61,188	68,175
Trade name
Finite-Lived Intangible Assets [Line Items]
Acquired amount	3,773	4,875
Accumulated amortization	(1,537)	(2,731)
Net book value	2,236	2,144
Other
Finite-Lived Intangible Assets [Line Items]
Acquired amount	14,884	12,356
Accumulated amortization	(5,914)	(4,278)
Net book value	$ 8,970	$ 8,078