Background - Schedule of Unamortized Debt Issuance Costs with Outstanding Debt (Details) - USD ($) $ in Thousands	Jun. 25, 2017	Sep. 25, 2016	Jun. 26, 2016	Jun. 28, 2015
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Debt issuance costs (within other non-current assets)	$ 1,026		$ 1,421
Total assets	571,503		525,442	$ 474,761
Long-term debt	111,382		107,805
Total liabilities	$ 210,697		198,497
Adjustments Due to Adoption of ASU 2015-03 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Debt issuance costs (within other non-current assets)		$ (1,421)
Total assets		(1,421)
Long-term debt		(1,421)
Total liabilities		$ (1,421)
As Previously Reported [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Debt issuance costs (within other non-current assets)			1,421
Total assets			526,863
Long-term debt			109,226
Total liabilities			$ 199,918