Goodwill and intangible assets (Intangible Assets) (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Jun. 30, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 257,243	$ 260,667
Accumulated Amortization	(87,970)	(79,328)
Net Book Value	169,273	181,339
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	245,674	248,105
Accumulated Amortization	(84,993)	(76,645)
Net Book Value	160,681	171,460
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,853	3,690
Accumulated Amortization	(1,591)	(1,279)
Net Book Value	2,262	2,411
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,320	3,820
Accumulated Amortization	(878)	(970)
Net Book Value	2,442	2,850
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,396	5,052
Accumulated Amortization	(508)	(434)
Net Book Value	$ 3,888	$ 4,618