Employee Benefit Plans (Tables)

12 Months Ended

Sep. 27, 2025

Retirement Benefits [Abstract]

Schedule of defined benefit plans disclosure

The following tables provide a reconciliation of the changes in the benefit obligations and the fair value of the plan assets for fiscal 2025 and 2024 and a statement of the funded status for

both years. Under the Partnership’s cash balance defined benefit pension plan, the accumulated benefit obligation and the projected benefit obligation are the same.

	Pension Benefits						Retiree Health and Life Benefits
	2025			2024			2025			2024
Reconciliation of benefit obligations:
Benefit obligation at beginning of year	$	65,405		$	69,372		$	2,528		$	2,871
Interest cost		2,577			3,129			100			143
Actuarial (gain) loss		(1,888	)		2,012			(278	)		(164	)
Lump sum benefits paid		(3,441	)		(3,917	)		—			—
Ordinary benefits paid		(4,882	)		(5,191	)		(277	)		(322	)
Prior service credits		—			—			14			—
Benefit obligation at end of year	$	57,771		$	65,405		$	2,087		$	2,528
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	$	52,758		$	51,340		$	—		$	—
Actual return on plan assets		(260	)		6,526			—			—
Employer contributions		4,000			4,000			277			322
Lump sum benefits paid		(3,441	)		(3,917	)		—			—
Ordinary benefits paid		(4,882	)		(5,191	)		(277	)		(322	)
Fair value of plan assets at end of year	$	48,175		$	52,758		$	—		$	—
Funded status:
Funded status at end of year	$	(9,596	)	$	(12,647	)	$	(2,087	)	$	(2,528	)
Amounts recognized in consolidated balance sheets    consist of:
Net amount recognized at end of year	$	(9,596	)	$	(12,647	)	$	(2,087	)	$	(2,528	)
Less: current portion		—			—			289			342
Noncurrent benefit liability	$	(9,596	)	$	(12,647	)	$	(1,798	)	$	(2,186	)
Amounts not yet recognized in net periodic benefit cost    and included in accumulated other comprehensive    income (loss):
Actuarial net (loss) gain	$	(8,697	)	$	(9,809	)	$	3,148		$	3,556
Prior service credits		—			—			66			106
Net amount recognized in accumulated other    comprehensive (loss) income	$	(8,697	)	$	(9,809	)	$	3,214		$	3,662

Percentage allocation of plan assets

The following table presents the actual allocation of assets held in trust as of:

	September 27,	September 28,
	2025	2024
Fixed income securities	85%	85%
Equity securities	15%	15%
	100%	100%

Schedule of measurement of partnership's pension plan assets by category

The following table describes the measurement of the Partnership’s pension plan assets by asset category as of:

	September 27,		September 28,
	2025		2024
Short term investments (1)	$	1,504	$	1,466
Equity securities: (1) (2)
Domestic		4,480		2,855
International		2,603		4,975
Fixed income securities (1) (3)		39,588		43,462
	$	48,175	$	52,758

(1) Includes funds which are not publicly traded and are valued at the net asset value of the units provided by the fund issuer.

(2) Includes funds which invest primarily in a diversified portfolio of publicly traded U.S. and Non-U.S. common stock.

(3) Includes funds which invest primarily in publicly traded and non-publicly traded, investment grade corporate bonds, U.S. government bonds and asset-backed securities.

Schedule of expected benefit payments

The Partnership expects to contribute approximately $4,000 to the defined benefit pension plan during fiscal 2026. Estimated future benefit payments for both pension and retiree health and life benefits are as follows:

	Pension		Retiree Health and
Fiscal Year	Benefits		Life Benefits
2026	$	15,926	$	289
2027		5,802		250
2028		5,361		214
2029		5,036		181
2030		4,498		152
2031 through 2035		17,577		431

Components of Net Periodic Benefit Costs

The following table provides the components of net periodic benefit costs included in operating expenses for fiscal 2025, 2024 and 2023:

	Pension Benefits									Retiree Health and Life Benefits
	2025			2024			2023			2025			2024			2023
Interest cost	$	2,577		$	3,129		$	3,306		$	100		$	143		$	166
Expected return on plan assets		(1,289	)		(1,260	)		(1,355	)		—			—			—
Amortization of prior service credit		—			—			—			(25	)		(284	)		(498	)
Settlement charge		528			638			—			—			—			—
Recognized net actuarial loss (gain)		245			1,489			1,927			(687	)		(741	)		(775	)
Net periodic benefit costs	$	2,061		$	3,996		$	3,878		$	(612	)	$	(882	)	$	(1,107	)

Schedule of assumptions used

The assumptions used in the measurement of the Partnership’s benefit obligations as of September 27, 2025 and September 28, 2024 are shown in the following table:

	Pension Benefits						Retiree Health and Life Benefits
	2025			2024			2025			2024
Weighted-average discount rate		5.000	%		4.625	%		4.500	%		4.250	%
Average rate of compensation increase	n/a			n/a			n/a			n/a

The assumptions used in the measurement of net periodic pension benefit and postretirement benefit costs for fiscal 2025, 2024 and 2023 are shown in the following table:

	Pension Benefits									Retiree Health and Life Benefits
	2025			2024			2023			2025			2024			2023
Weighted-average discount rate		4.625	%		5.500	%		5.125	%		4.250	%		5.375	%		4.875	%
Average rate of compensation increase	n/a			n/a			n/a			n/a			n/a			n/a
Weighted-average expected long-term    rate of return on plan assets		2.900	%		2.950	%		2.950	%	n/a			n/a			n/a

Total contributions made to multiemployer pension plans

While no multi-employer pension plan that the Partnership contributed to is individually significant to the Partnership, the table below discloses the MEPPs to which the Partnership contributes. The financial health of a MEPP is indicated by the zone status, as defined by the PPA, which represents the funded status of the plan as certified by the plan's actuary. Plans in the red zone are less than 65% funded, the yellow zone are between 65% and 80% funded, and green zone are at least 80% funded. Total contributions made by the Partnership to multi-employer pension plans for the fiscal years ended September 27, 2025, September 28, 2024 and September 30, 2023 are shown below.

		PPA Zone Status			Contributions						Contributions greater than 5% of	Expiration
Pension Fund	EIN/Pension Plan Number	2025	2024	FIP/RP Status	2025		2024		2023		Total Plan Contributions	date of CBA
Local 282 Pension Trust (1)	11-6245313	Green	Green	n/a	$	215	$	269	$	301	No	August 2029
Western Conference of Teamsters Pension Plan (1)	91-6145047	Green	Green	n/a		23		29		18	No	February 2024
					$	238	$	298	$	319

(1) Based on most recent available valuation information for plan year ended December 2023.