Employee Benefit Plans (Tables)

12 Months Ended

Dec. 26, 2020

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Schedule of Multiemployer Plans [Table Text Block]

The "FIP/RP Status Pending/Implemented" column indicates a plan for which a financial improvement plan (FIP) or a rehabilitation plan (RP) is either pending or has been implemented. The last column lists the expiration date of the collective-bargaining agreement to which the plan is subject.

Pension Fund	EIN/Pension Plan Number	Pension Protection Act Zone Status		FIP/RP Status Pending/Implemented (1)	Contributions (2)						Surcharge Imposed (1)	Expiration Date of Collective-Bargaining Agreement
		2020	2019		2020		2019		2018
The Pension Plan of the National Retirement Fund	13-6130178 - 001	Red	Red	Implemented	$	272	$	335	$	320	Yes	6/4/2022

(1) The collective-bargaining agreement requires the Company to contribute to the plan at the rate of $0.47 per compensated hour for each covered employee. The Company will make additional contributions, as mandated by law, in accordance with the fund's 2010 Rehabilitation Plan which required a surcharge equal to $0.03 per hour (from $0.47 to $0.50) effective June 1, 2014 to May 31, 2015, a surcharge equal to $0.03 per hour (from $0.50 to $0.53) effective June 1, 2015 to May 31, 2016, a surcharge equal to $0.02 per hour (from $0.53 to $0.55) effective June 1, 2016 to May 31, 2017, a surcharge equal to $0.03 per hour (from $0.55 to $0.58) effective June 1, 2017 to May 31, 2018, a surcharge equal to $0.02 per hour (from $0.58 to $0.60) effective June 1, 2018 to May 31, 2019, a surcharge equal to $0.03 per hour (from $0.60 to $0.63) effective June 1, 2019 to May 31, 2020, and a surcharge equal to $0.03 per hour (from $0.63 to $0.66) effective June 1, 2020 to May 31, 2021. Based upon current employment and benefit levels, the Company's contributions to the multi-employer pension plan are expected to be approximately $277 for 2021.

(2) The Company's contributions to the plan do not represent more than 5% of the total contributions to the plan for the most recent plan year available.

Schedule of Net Funded Status [Table Text Block]

Information about the benefit obligation and funded status of the Company's postretirement benefit plan is summarized as follows:

	2020		2019
Change in benefit obligation:
Benefit obligation at beginning of year	$	360	$	331
Service cost	8		7
Interest cost	17		17
Actuarial (gain) loss	6		6
Benefits paid	(1)		(1)
Benefit obligation at end of year	390		360
Change in plan assets:
Fair value of plan assets at beginning of year	—		—
Employer contributions	1		1
Benefits paid	(1)		(1)
Fair value of plan assets at end of year	—		—
Unfunded amount	$	(390)	$	(360)

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

The balance sheet classification of the Company's liability for the postretirement benefit plan is summarized as follows:

	2020		2019
Accrued expenses	$	17	$	16
Other long-term liabilities	373		344
Total liability	$	390	$	360

Schedule of Expected Benefit Payments [Table Text Block]

Benefits expected to be paid on behalf of associates for the postretirement benefit plan during the period 2021 through 2030 are summarized as follows:

Years	Postretirement Plan
2021	$	17
2022	16
2023	16
2024	16
2025	16
2026-30	79

Defined Benefit Plan, Assumptions [Table Text Block]

Assumptions used to determine the benefit obligation of the Company's postretirement benefit plan are summarized as follows:

	2020		2019
Weighted-average assumptions as of year-end:
Discount rate (benefit obligation)	3.25	%	3.50	%

Schedule of Net Benefit Costs [Table Text Block]

Components of net periodic benefit cost (credit) for the postretirement plan are summarized as follows:

	2020		2019		2018
Service cost	$	8	$	7	$	8
Interest cost	17		17		17
Amortization of prior service credits	—		(3)		(4)
Recognized net actuarial gains	(25)		(27)		(28)
Net periodic benefit cost (credit)	$	—	$	(6)	$	(7)

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]

Pre-tax amounts included in AOCIL for the Company's postretirement benefit plan at 2020 are summarized as follows:

	Postretirement Benefit Plan
	Balance at 2020		2021 Expected Amortization
Unrecognized actuarial gains	$	(309)	$	(24)
Totals	$	(309)	$	(24)