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Derivative financial instruments (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Apr. 01, 2017
Apr. 02, 2016
Apr. 01, 2017
Apr. 02, 2016
Jul. 02, 2016
Derivative Instruments, Gain (Loss) [Line Items]          
Average length of time of Foreign exchange contracts     59 days   53 days
Not Designated as Hedging Instrument | Foreign Exchange Forward          
Derivative Instruments, Gain (Loss) [Line Items]          
Derivative, Gain (Loss) on Derivative, Net $ 26 $ 2,358 $ (8,711) $ 569  
Other expenses, net          
Derivative Instruments, Gain (Loss) [Line Items]          
Net derivative financial instrument gain (loss)     $ (35,000)