Goodwill and intangible assets (Intangible Assets) (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Jun. 30, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 282,781	$ 260,667
Accumulated Amortization	(103,496)	(79,328)
Net Book Value	179,285	181,339
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	271,515	248,105
Accumulated Amortization	(100,180)	(76,645)
Net Book Value	171,335	171,460
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,774	3,690
Accumulated Amortization	(2,050)	(1,279)
Net Book Value	1,724	2,411
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,320	3,820
Accumulated Amortization	(446)	(970)
Net Book Value	2,874	2,850
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,172	5,052
Accumulated Amortization	(820)	(434)
Net Book Value	$ 3,352	$ 4,618