Divestitures - Financial Data (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 02, 2017	Mar. 27, 2016	Apr. 02, 2017	Mar. 27, 2016
Financial data
Income from discontinued operations, net of tax	$ 7	$ 457	$ 3,704	$ 934
TeknaSeal | Discontinued Operations, Disposed of by Sale
Financial data
Sales			1,277
Cost of sales			(943)
Gross profit			334
Selling, general and administrative			(242)
Income of discontinued operations, before income taxes			92
Gain on sale of discontinued operations	(14)		5,374
Total income from discontinued operations, before income taxes	(14)		5,466
Income tax benefit (expense) on discontinued operations	21		(1,762)
Income from discontinued operations, net of tax	$ 7		3,704
TeknaSeal | Discontinued Operations, Held-for-sale
Financial data
Sales		1,615		3,665
Cost of sales		(938)		(2,104)
Gross profit		677		1,561
Selling, general and administrative		(220)		(627)
Income of discontinued operations, before income taxes		457		934
Total income from discontinued operations, before income taxes		457		934
Income from discontinued operations, net of tax		$ 457		$ 934
Precision Components Group | TeknaSeal | Discontinued Operations, Disposed of by Sale
Financial data
Gain on sale of discontinued operations			$ 5,374