Financial Instruments and Risk Management (Tables)

3 Months Ended

Dec. 28, 2019

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 28, 2019 and September 28, 2019, respectively:

	As of December 28, 2019			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	$	3,069	Other current assets	$	4,082
	Other assets		10	Other assets		167
		$	3,079		$	4,249
Liability Derivatives	Location	Fair Value		Location	Fair Value
Derivatives not designated as    hedging instruments:
Commodity-related derivatives	Other current liabilities	$	238	Other current liabilities	$	3,360
	Other liabilities		—	Other liabilities		—
		$	238		$	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)
	December 28, 2019					December 29, 2018
	Assets			Liabilities		Assets			Liabilities
Beginning balance of over-the-counter options	$	419		$	—	$	1,546		$	361
Beginning balance realized during the period		(234	)		—		(393	)		(46	)
Contracts purchased during the period		—			—		—			—
Change in the fair value of outstanding contracts		(181	)		—		2,157			(315	)
Ending balance of over-the-counter options	$	4		$	—	$	3,310		$	—

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 28, 2019 and December 29, 2018 are as follows:

	Three Months Ended December 28, 2019			Three Months Ended December 29, 2018
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	$	2,776	Cost of products sold	$	(15,911	)

Fair value of the Partnership's recognized derivative assets and liabilities on a gross basis and amounts offset on the condensed consolidated balance sheets

The following table presents the fair value of the Partnership’s recognized derivative assets and liabilities on a gross basis and amounts offset on the condensed consolidated balance sheets subject to enforceable master netting arrangements or similar agreements:

	As of December 28, 2019							As of September 28, 2019
						Net amounts							Net amounts
						presented in the							presented in the
	Gross amounts		Effects of netting			balance sheet		Gross amounts		Effects of netting			balance sheet
Asset Derivatives
Commodity-related derivatives	$	11,056	$	(7,977	)	$	3,079	$	10,464	$	(6,215	)	$	4,249
Liability Derivatives
Commodity-related derivatives	$	8,215	$	(7,977	)	$	238	$	9,575	$	(6,215	)	$	3,360

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 28,		September 28,
	2019		2019
5.5% senior notes due June 1, 2024	$	541,013	$	540,094
5.75% senior notes due March 1, 2025		255,750		253,178
5.875% senior notes due March 1, 2027		366,187		354,375
	$	1,162,950	$	1,147,647