Goodwill and intangible assets (Details Textuals) (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2012	Apr. 02, 2011	Mar. 31, 2012	Apr. 02, 2011
Goodwill and intangible assets (Textuals) [Abstract]
Customer relationship and trade name intangible assets acquired	$ 42,764,000		$ 42,764,000
Intangible assets carrying value	142,725,000		142,725,000
Intangible assets original cost value	214,694,000		214,694,000
Accumulated amortization and foreign currency translation	71,969,000		71,969,000
Weighted average life of intangible assets	8
Intangible asset amortization expense	6,853,000	4,620,000	19,143,000	14,390,000
Amortization expense year one	26,000,000
Amortization expense year two	26,000,000
Amortization expense year three	25,000,000
Amortization expense year four	19,000,000
Amortization expense year five	$ 17,000,000