Derivative Instruments and Hedging Activities (Tables)

12 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Assets and Liabilities Including Offsetting Amounts

The following table presents the Company’s derivative assets and liabilities, as well as the effects of offsetting, as of September 30, 2018 and 2017:

	2018			2017
Derivative assets:
Derivatives designated as hedging instruments:
Interest rate contracts	$	30		$	—
Derivatives subject to PGC and DS mechanisms:
Commodity contracts	3,002			1,665
Derivatives not designated as hedging instruments:
Commodity contracts	152			142
Total derivative assets – gross	3,184			1,807
Gross amounts offset in the balance sheet	(146		)	(450		)
Total derivative assets – net (a)	$	3,038		$	1,357
Derivative liabilities:
Derivatives subject to PGC and DS mechanisms:
Commodity contracts	$	(146	)	$	(1,520	)
Total derivative liabilities – gross	(146		)	(1,520		)
Gross amounts offset in the balance sheet	146			450
Total derivative liabilities – net (a)	$	—		$	(1,070	)

(a) Derivative assets and liabilities with maturities greater than one year are recorded in “Other assets” and “Other noncurrent liabilities” on the Consolidated Balance Sheets.

Effects of Derivative Instruments on Consolidated Statements of Income and Changes in AOCI

The following table provides information on the effects of derivative instruments not subject to ratemaking mechanisms on the Consolidated Statements of Income and changes in AOCI for Fiscal 2018, Fiscal 2017 and Fiscal 2016:

	Gain (loss) Recognized in AOCI							Loss Reclassified from AOCI into Income									Location of
	2018		2017		2016			2018			2017			2016			Loss Reclassified from AOCI into Income
Cash Flow Hedges:
Interest rate contracts	$	30	$	—	$	(28,958	)	$	(3,485	)	$	(3,397	)	$	(2,680	)	Interest expense
	Gain (Loss) Recognized in Income																Location of Gain (Loss)
	2018		2017		2016												Recognized in Income
Derivatives Not Subject to PGC and DS Mechanisms:
Gasoline contracts	$	319	$	174	$	(88	)										Operating and administrative expenses/other operating income, net