Financial Instruments and Risk Management (Tables)

3 Months Ended

Dec. 26, 2020

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 December 26, 2020 and September 26, 2020, respectively:

	As of December 26, 2020			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	$	5,729	Other current assets	$	1,066
	Other assets		198	Other assets		461
		$	5,927		$	1,527
Liability Derivatives	Location	Fair Value		Location	Fair Value
Derivatives not designated as    hedging instruments:
Commodity-related derivatives	Other current liabilities	$	2,704	Other current liabilities	$	2,684
	Other liabilities		—	Other liabilities		—
		$	2,704		$	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)
	December 26, 2020				December 28, 2019
	Assets		Liabilities		Assets			Liabilities
Beginning balance of over-the-counter options	$	—	$	—	$	419		$	—
Beginning balance realized during the period		—		—		(234	)		—
Contracts purchased during the period		—		—		—			—
Change in the fair value of outstanding contracts		—		—		(181	)		—
Ending balance of over-the-counter options	$	—	$	—	$	4		$	—

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 months ended December 26, 2020 and December 28, 2019 are as follows:

	Three Months Ended December 26, 2020			Three Months Ended December 28, 2019
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	$	4,855	Cost of products sold	$	2,776

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
	December 26,		September 26,
	2020		2020
5.5% senior notes due June 1, 2024	$	535,500	$	531,563
5.75% senior notes due March 1, 2025		255,938		255,625
5.875% senior notes due March 1, 2027		364,893		360,063
	$	1,156,331	$	1,147,251