Derivative Instruments and Hedging Activities (Tables)

6 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Balance Sheet Location and Fair Value of Derivative Assets and Liabilities

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

	March 31, 2019			September 30, 2018			March 31, 2018
Derivative assets:
Derivatives designated as hedging instruments:
Interest rate contracts	$	—		$	30		$	—
Derivatives subject to PGC and DS mechanisms:
Commodity contracts	1,258			3,002			860
Derivatives not designated as hedging instruments:
Commodity contracts	—			152			191
Total derivative assets — gross	1,258			3,184			1,051
Gross amounts offset in the balance sheet	(211		)	(146		)	(37		)
Total derivative assets — net (a)	$	1,047		$	3,038		$	1,014
Derivative liabilities:
Derivatives designated as hedging instruments:
Interest rate contracts	$	(2,528	)	$	—		$	—
Derivatives subject to PGC and DS mechanisms:
Commodity contracts	(211		)	(146		)	(589		)
Derivatives not designated as hedging instruments:
Commodity contracts	(40		)	—			—
Total derivative liabilities — gross	(2,779		)	(146		)	(589		)
Gross amounts offset in the balance sheet	211			146			37
Total derivative liabilities — net (a)	$	(2,568	)	$	—		$	(552	)

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

Effects of Derivative Instruments on the Condensed Consolidated Statements of Income and Changes in AOCI and Noncontrolling Interest

The following table provides information on the effects of derivative instruments not subject to ratemaking mechanisms on the Condensed Consolidated Statements of Income and changes in AOCI for the three and six months ended March 31, 2019 and 2018:

	Loss Recognized in AOCI					Loss Reclassified from AOCI into Income						Location of Loss Reclassified from AOCI into Income
Three Months Ended March 31,	2019			2018		2019			2018
Cash Flow Hedges:
Interest rate contracts	$	(873	)	$	—	$	(870	)	$	(872	)	Interest expense
	Gain Recognized in Income					Location of Gain Recognized in Income
Three Months Ended March 31,	2019			2018
Derivatives Not Subject to PGC and DS Mechanisms:
Commodity contracts	$	129		$	12	Operating and administrative expenses
	Loss Recognized in AOCI					Loss Reclassified from AOCI into Income						Location of Loss Reclassified from AOCI into Income
Six Months Ended March 31,	2019			2018		2019			2018
Cash Flow Hedges:
Interest rate contracts	$	(2,558	)	$	—	$	(1,742	)	$	(1,743	)	Interest expense
	(Loss) Gain Recognized in Income					Location of (Loss) Gain Recognized in Income
Six Months Ended March 31,	2019			2018
Derivatives Not Subject to PGC and DS Mechanisms:
Commodity contracts	$	(267	)	$	161	Operating and administrative expenses