Financial Instruments and Risk Management (Tables)

6 Months Ended

Mar. 27, 2021

Fair Value Disclosures [Abstract]

Fair value of the Partnership's derivative instruments and their location in the condensed consolidated balance sheets

The following summarizes the fair value of the Partnership’s derivative instruments and their location in the condensed consolidated balance sheets as of March 27, 2021 and September 26, 2020, respectively:

	As of March 27, 2021			As of September 26, 2020
Asset Derivatives	Location	Fair Value		Location	Fair Value
Derivatives not designated as    hedging instruments:
Commodity-related derivatives	Other current assets	$	11,490	Other current assets	$	1,066
	Other assets		44	Other assets		461
		$	11,534		$	1,527
Liability Derivatives	Location	Fair Value		Location	Fair Value
Derivatives not designated as    hedging instruments:
Commodity-related derivatives	Other current liabilities	$	4,440	Other current liabilities	$	2,684
	Other liabilities		—	Other liabilities		—
		$	4,440		$	2,684

Reconciliation of the beginning and ending balances of assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs

The following summarizes the reconciliation of the beginning and ending balances of assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs:

	Fair Value Measurement Using Significant Unobservable Inputs (Level 3)
	Six Months Ended				Six Months Ended
	March 27, 2021				March 28, 2020
	Assets		Liabilities		Assets			Liabilities
Beginning balance of over-the-counter options	$	—	$	—	$	419		$	—
Beginning balance realized during the period		—		—		(387	)		—
Contracts purchased during the period		750		—		—			—
Change in the fair value of outstanding contracts		—		—		(32	)		—
Ending balance of over-the-counter options	$	750	$	—	$	—		$	—

Effect of the Partnership's derivative instruments on the condensed consolidated statements of operations

The effect of the Partnership’s derivative instruments on the condensed consolidated statements of operations for the three and six months ended March 27, 2021 and March 28, 2020 are as follows:

	Three Months Ended March 27, 2021			Three Months Ended March 28, 2020
Derivatives Not Designated as Hedging Instruments	Unrealized Gains (Losses) Recognized in Income			Unrealized Gains (Losses) Recognized in Income
	Location	Amount		Location	Amount
Commodity-related derivatives	Cost of products sold	$	1,638	Cost of products sold	$	(4,714	)

	Six Months Ended March 27, 2021			Six Months Ended March 28, 2020
Derivatives Not Designated as Hedging Instruments	Unrealized Gains (Losses) Recognized in Income			Unrealized Gains (Losses) Recognized in Income
	Location	Amount		Location	Amount
Commodity-related derivatives	Cost of products sold	$	6,493	Cost of products sold	$	(1,938	)

Fair Value of the Partnership's Senior Notes

.  Based upon quoted market prices (a Level 1 input), the fair value of the Senior Notes (also defined below in Note 10) of the Partnership are as follows:

	As of
	March 27,		September 26,
	2021		2020
5.5% senior notes due June 1, 2024	$	535,500	$	531,563
5.75% senior notes due March 1, 2025		255,625		255,625
5.875% senior notes due March 1, 2027		364,350		360,063
	$	1,155,475	$	1,147,251