Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Long-Term Debt Components of Long-Term Debt (Details) - USD ($) $ in Thousands	Feb. 23, 2019	Sep. 21, 2018	Aug. 25, 2018	Nov. 08, 2016
Debt Instrument [Line Items]
Long-term debt, gross	$ 283,330		$ 298,532
Debt issuance cost, net	(6,412)		(7,091)
Long-term debt	276,918		291,441
Current maturities of long-term debt	2,750		0
Long-term debt, less current maturities	274,168		291,441
ABL
Debt Instrument [Line Items]
Long-term debt, gross	23,330	$ 165,000	38,532	$ 125,000
Term Loan
Debt Instrument [Line Items]
Long-term debt, gross	$ 260,000		$ 260,000	$ 300,000