Additional cash flow information (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Jul. 01, 2017
Interest and income taxes paid
Interest	$ 5,107	$ 18,840
Income taxes paid	18,362	15,216
Capital expenditures incurred but not paid	23,176	$ 7,406
Unsettled repurchases of common stock	4,000
Trading shares sold, but payment not yet received	4,100
Cash equivalents	$ 5,500		$ 208,300