Derivative Instruments and Hedging Activities (Tables)

6 Months Ended

Mar. 31, 2016

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, as of March 31, 2016 and 2015:

	March 31, 2016			March 31, 2015
Derivative assets:
Derivatives subject to PGC and DS mechanisms:
Commodity contracts	$	1,179		$	613
Total derivative assets - gross	1,179			613
Gross amounts offset in the balance sheet	(298		)	(1		)
Total derivative assets - net	$	881		$	612
Derivative liabilities:
Derivatives subject to PGC and DS mechanisms:
Commodity contracts	$	(3,466	)	$	(5,168	)
Derivatives not subject to PGC and DS mechanisms:
Commodity contracts	(202		)	(372		)
Total derivative liabilities - gross	(3,668		)	(5,540		)
Gross amounts offset in the balance sheet	298			1
Total derivative liabilities - net	$	(3,370	)	$	(5,539	)

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, 2016 and 2015:

	Loss Recognized in AOCI						Loss Reclassified from AOCI into Income						Location of Loss Reclassified from AOCI into Income
Three Months Ended March 31,	2016			2015			2016			2015
Cash Flow Hedges:
Interest rate contracts	$	(32,168	)	$	—		$	(609	)	$	(670	)	Interest expense
	Loss Recognized in Income						Location of Loss Recognized in Income
Three Months Ended March 31,	2016			2015
Derivatives Not Subject to PGC and DS Mechanisms:
Gasoline contracts	$	(55	)	$	(4	)	Operating expenses/other operating income, net
	Loss Recognized in AOCI						Loss Reclassified from AOCI into Income						Location of Loss Reclassified from AOCI into Income
Six Months Ended March 31,	2016			2015			2016			2015
Cash Flow Hedges:
Interest rate contracts	$	(28,959	)	$	—		$	(1,275	)	$	(1,339	)	Interest expense
	Loss Recognized in Income						Location of Loss Recognized in Income
Six Months Ended March 31,	2016			2015
Derivatives Not Subject to PGC and DS Mechanisms:
Gasoline contracts	$	(120	)	$	(526	)	Operating expenses/other operating income, net