Financial Instruments and Risk Management (Tables)

9 Months Ended

Jun. 30, 2018

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 June 30, 2018 and September 30, 2017, respectively:

	As of June 30, 2018			As of September 30, 2017
Asset Derivatives	Location	Fair Value		Location	Fair Value
Derivatives not designated as hedging instruments:
Commodity-related derivatives	Other current assets	$	10,953	Other current assets	$	11,164
	Other assets		158	Other assets		771
		$	11,111		$	11,935
Liability Derivatives	Location	Fair Value		Location	Fair Value
Derivatives not designated as hedging instruments:
Commodity-related derivatives	Other current liabilities	$	4,962	Other current liabilities	$	1,978
	Other liabilities		—	Other liabilities		432
		$	4,962		$	2,410

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)
	Nine Months Ended						Nine Months Ended
	June 30, 2018						June 24, 2017
	Assets			Liabilities			Assets			Liabilities
Beginning balance of over-the-counter options	$	4,108		$	737		$	809		$	—
Beginning balance realized during the period		(3,277	)		(737	)		(589	)		—
Contracts purchased during the period		1,352			158			—			—
Change in the fair value of outstanding contracts		(800	)		—			(115	)		—
Ending balance of over-the-counter options	$	1,383		$	158		$	105		$	—

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 and the condensed consolidated statements of comprehensive income, as applicable, for the three and nine months ended June 30, 2018 and June 24, 2017 are as follows:

	Three Months Ended June 30, 2018					Three Months Ended June 24, 2017
Derivatives in Cash Flow	Gains (Losses) Recognized  in OCI		Gains (Losses) Reclassified from Accumulated OCI into Income			Gains (Losses) Recognized  in OCI		Gains (Losses) Reclassified from Accumulated OCI into Income
Hedging Relationships	(Effective Portion)		Location	Amount		(Effective Portion)		Location	Amount
Interest rate swap	$	—	Interest expense	$	—	$	—	Interest expense	$	—
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	$	3,806			Cost of products sold	$	(655	)

Nine Months Ended June 30, 2018

Nine Months Ended June 24, 2017

Derivatives in Cash Flow

Gains (Losses) Recognized  in OCI

Gains (Losses) Reclassified from Accumulated OCI into Income

Gains (Losses) Recognized  in OCI

Gains (Losses) Reclassified from Accumulated OCI into Income

Hedging Relationships

(Effective Portion)

Location

Amount

(Effective Portion)

Location

Amount

Interest rate swap

$

—

Interest expense

$

—

$

(10

)

Interest expense

$

(215

)

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

$

(1,421

)

Cost of products sold

$

(2,708

)

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 June 30, 2018							As of September 30, 2017
						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	$	19,688	$	(8,577	)	$	11,111	$	16,378	$	(4,443	)	$	11,935
Liability Derivatives
Commodity-related derivatives	$	13,539	$	(8,577	)	$	4,962	$	6,853	$	(4,443	)	$	2,410

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 8) of the Partnership are as follows:

	As of
	June 30,		September 30,
	2018		2017
5.5% senior notes due June 1, 2024	$	511,875	$	527,888
5.75% senior notes due March 1, 2025		240,625		248,750
5.875% senior notes due March 1, 2027		327,250		349,125
	$	1,079,750	$	1,125,763