Goodwill and intangible assets (Schedule of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 28, 2014	Jun. 29, 2013
Goodwill [Line Items]
Gross Acquired Amount	$ 344,322	$ 283,604
Accumulated Amortization	(160,014)	(111,392)
Net Book Value	184,308	172,212
Customer Relationships [Member]
Goodwill [Line Items]
Gross Acquired Amount	319,496	276,107
Accumulated Amortization	(155,604)	(109,946)
Net Book Value	163,892	166,161
Trade Names [Member]
Goodwill [Line Items]
Gross Acquired Amount	5,993	3,320
Accumulated Amortization	(1,555)	(480)
Net Book Value	4,438	2,840
Other [Member]
Goodwill [Line Items]
Gross Acquired Amount	18,833	4,177
Accumulated Amortization	(2,855)	(966)
Net Book Value	$ 15,978	$ 3,211