Retirement Plans - Schedule of Future Cash Flows (Details) $ in Thousands	4 Months Ended
Jan. 17, 2021 USD ($)
SERP
Defined Benefit Plan Disclosure [Line Items]
Net year-to-date contributions	$ 1,749
Remaining estimated net contributions during fiscal 2021	3,474
Postretirement Healthcare Plans
Defined Benefit Plan Disclosure [Line Items]
Net year-to-date contributions	312
Remaining estimated net contributions during fiscal 2021	$ 948

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration