Measurement period of average distribution coverage ratio related to 2014 Long Term Incentive Plan of the Partnership.

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Share based compensation arrangement by share based payment award equity instruments other than grants in period aggregate grant date fair value.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

+ References

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- Definition

Description of the deferred compensation arrangement, including fixed amounts and determinable awards, or the method for determining payments and awards, the timing of such payments and awards, and any requisite service or performance criteria, as of the balance sheet date.

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General description of deferred compensation arrangements. Deferred compensation represents currently earned compensation that, under the terms of a profit-sharing, rabbi trust, pension, employee contract, or equity-based (including stock or unit option) plan, is not actually paid until a later date and is therefore not taxable until that date. May also include some split-dollar life insurance arrangements. This type of arrangement is usually made to help employees postpone paying taxes on the income and also to retain employees longer.

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

No definition available.

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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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- Definition

Description of terms of share-based payment arrangement. Includes, but is not limited to, type of award or grantee and reason for issuance.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

Amount of cash paid to settle liability for award under share-based payment arrangement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Number of additional shares authorized for issuance under share-based payment arrangement.

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Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

Percentage of vesting of award under share-based payment arrangement.

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Unit-Based Compensation Arrangements - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Jun. 26, 2021	Dec. 26, 2020	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020	Sep. 26, 2020	Jul. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Additional number of Common Units authorized for issuance (in units)				1,725,000
Distribution Equivalent Rights Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense	$ 216		$ 237	$ 629	$ 842
Distribution Equivalent Rights Plan, terms				On January 17, 2017, the Partnership adopted the Distribution Equivalent Rights Plan (the “DER Plan”), which gives the Compensation Committee of the Partnership’s Board of Supervisors discretion to award distribution equivalent rights (“DERs”) to executive officers of the Partnership. Once awarded, DERs entitle the grantee to a cash payment each time the Board of Supervisors declares a cash distribution on the Partnership’s Common Units, which cash payment will be equal to an amount calculated by multiplying the number of unvested restricted units which are held by the grantee on the record date of the distribution, by the amount of the declared distribution per Common Unit.
2009 Restricted Unit Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total number of Common Units authorized for issuance (in units)							2,400,000
Awards Granted				779,837
Aggregate grant date fair value of restricted units awarded				$ 11,254
2009 and 2018 Restricted Unit Plan [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total number of Common Units authorized for issuance (in units)	3,525,000			3,525,000
2018 Restricted Unit Plan [Member
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost	$ 6,238			$ 6,238
Weighted-average recognition period of compensation cost				10 months 24 days
Compensation expense	$ 2,571		2,262	$ 7,524	7,084
2018 Restricted Unit Plan [Member \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total number of Common Units authorized for issuance (in units)	1,800,000			1,800,000
2018 Restricted Unit Plan [Member \| Maximum [Member] \| Vesting each of the first three anniversaries of the award grant date [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted unit awards vesting percentage				33.33%
Long-Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Long-Term Incentive Plan, terms of award				The LTIPs are non-qualified, unfunded, long-term incentive plans for executive officers and key employees that provide for payment, in the form of cash, of an award of equity-based compensation at the end of a three-year performance period.
Measurement period of average distribution coverage ratio				3 years
Long-Term Incentive Plan, compensation earned, description				The level of compensation earned under the 2021 LTIP is evaluated using two separate measurement components: (i) 75% weight based on the level of average distributable cash flow of the Partnership over the three-year measurement period; and (ii) 25% weight based on the achievement of certain operating and strategic objectives, set by the Compensation Committee of the Board of Supervisors, over the three-year measurement period. The distributable cash flow component and operating/strategic objectives component are defined and described in the 2021 LTIP document.
Compensation expense (income)	$ 620		$ 1,304	$ 3,696	$ 18
Liability included within accrued employment and benefit costs (or other liabilities, as applicable) related to estimated future payments under the LTIP	8,061			$ 8,061		$ 7,718
Cash payouts	$ 0	$ 3,354