Financial Instruments and Risk Management (Tables)

6 Months Ended

Mar. 28, 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 March 28, 2020 and September 28, 2019, respectively:

	As of March 28, 2020			As of September 28, 2019
Asset Derivatives	Location	Fair Value		Location	Fair Value
Derivatives not designated as    hedging instruments:
Commodity-related derivatives	Other current assets	$	729	Other current assets	$	4,082
	Other assets		8,697	Other assets		167
		$	9,426		$	4,249
Liability Derivatives	Location	Fair Value		Location	Fair Value
Derivatives not designated as    hedging instruments:
Commodity-related derivatives	Other current liabilities	$	9,747	Other current liabilities	$	3,360
	Other liabilities		2,369	Other liabilities		—
		$	12,116		$	3,360

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 March 28, 2020					Six Months Ended March 30, 2019
	Assets			Liabilities		Assets			Liabilities
Beginning balance of over-the-counter options	$	419		$	—	$	1,546		$	361
Beginning balance realized during the period		(387	)		—		(1,179	)		(287	)
Contracts purchased during the period		—			—		—			—
Change in the fair value of outstanding contracts		(32	)		—		869			(74	)
Ending balance of over-the-counter options	$	—		$	—	$	1,236		$	—

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 28, 2020 and March 30, 2019 are as follows:

	Three Months Ended March 28, 2020				Three Months Ended March 30, 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	$	(4,714	)	Cost of products sold	$	8,521

	Six Months Ended March 28, 2020				Six Months Ended March 30, 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	$	(1,938	)	Cost of products sold	$	(7,390	)

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 28,		September 28,
	2020		2019
5.5% senior notes due June 1, 2024	$	488,408	$	540,094
5.75% senior notes due March 1, 2025		231,250		253,178
5.875% senior notes due March 1, 2027		315,875		354,375
	$	1,035,533	$	1,147,647