Acquisitions and divestitures Divestitures (Details) (USD $)	3 Months Ended			12 Months Ended
	Dec. 29, 2012	Sep. 29, 2012	Mar. 31, 2012	Jun. 29, 2013	Jun. 30, 2012	Jul. 02, 2011
Business Acquisition [Line Items]
Cash proceeds from divestiture activities				$ 3,613,000	$ 0	$ 19,108,000
Loss on bargin purchase, pre tax					1,399,000	6,308,000
Loss on bargin purchase, after tax	(1,700,000)	(31,300,000)	(4,500,000)		854,000	3,857,000
Loss on bargin purchase on a diluted basis		$ 0.22	$ 0.03		$ 0.01	$ 0.02
TS Asia [Member]
Business Acquisition [Line Items]
Loss on divestiture				(1,667,000)
Loss on divestiture, net of tax				(1,704,000)
Loss on divestiture on a diluted basis				$ 0.01
New ProSys Corp [Member]
Business Acquisition [Line Items]
Cash proceeds from divestiture activities						$ 19,108,000