Supplemental Cash Flow Information - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 24, 2017	Sep. 25, 2016	Jun. 25, 2017	Jun. 26, 2016
Supplemental Cash Flow Information [Line Items]
Capital expenditures incurred but not yet paid	$ 2,928	$ 4,841	$ 3,234	$ 4,197
Building and Machinery [Member] | Construction Loans [Member]
Supplemental Cash Flow Information [Line Items]
Construction in Progress Expenditures Incurred but Not yet Paid		$ 2,835