SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

6 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Summary of Gas in Storage

The following table summarizes gas in storage, at average cost by segment as of:

	March 31, 2019				September 30, 2018
($ in thousands)	Gas in Storage			Bcf	Gas in Storage			Bcf
Energy Services		$	34,819	12.1		$	90,166	34.1
Natural Gas Distribution		23,617		4.4		94,467		24.9
Total		$	58,436	16.5		$	184,633	59.0

Disposal Groups, Including Discontinued Operations

The major classes of assets and liabilities included within the disposal group as held for sale are as follows:

(Thousands)	September 30, 2018			Assets reclassified as held for sale		Assets Sold			Other adjustments (1)			March 31, 2019
Assets held for sale:
Nonutility plant and equipment - wind equipment, at cost	$	224,356		$	—	$	(224,356	)	$	—		$	—
Nonutility plant and equipment - accumulated depreciation, wind equipment	(18,501		)	—		18,501			—			—
Prepaid and other current assets	789			1,747		(1,541		)	(995		)	—
Other noncurrent assets	261			—		(261		)	—			—
	$	206,905		$	1,747	$	(207,657	)	$	(995	)	$	—
Liabilities held for sale:
Accounts payable and other	$	186		$	—	$	(186	)	$	—		$	—
Asset retirement obligation	3,996			—		(3,996		)	—			—
	$	4,182		$	—	$	(4,182	)	$	—		$	—

(1) Activity relates to amortization of prepaid and other current assets.

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table presents the changes in the components of accumulated other comprehensive income (loss), net of related tax effects during the three months ended March 31, 2019 and 2018:

(Thousands)	Investments in Equity Securities			Postemployment Benefit Obligation				Total
Balance at December 31, 2018	$	—		$	(15,822	)		$	(15,822	)
Other comprehensive loss (income), net of tax
Amounts reclassified from accumulated other comprehensive loss, net of tax of $0, $(119), $(119)	—			305			(1)	305
Balance at March 31, 2019	$	—		$	(15,517	)		$	(15,517	)
Balance at December 31, 2017	$	5,600		$	(14,060	)		$	(8,460	)
Other comprehensive (loss) income, net of tax
Other comprehensive loss,before reclassifications, net of tax of $7,366, $0, $7,366	(20,401		)	—				(20,401		)
Amounts reclassified from accumulated other comprehensive income, net of tax of $(3,036), $(104), $(3,140)	14,801			272			(1)	15,073
Net current-period other comprehensive (loss) income, net of tax of $4,330, $(104), $4,226	(5,600		)	272				(5,328		)
Balance as of March 31, 2018	$	—		$	(13,788	)		$	(13,788	)

The following table presents the changes in the components of accumulated other comprehensive income (loss), net of related tax effects during the six months ended March 31, 2019 and 2018:

(Thousands)	Investments in Equity Securities				Postemployment Benefit Obligation				Total
Balance at September 30, 2018	$	3,446			$	(16,056	)		$	(12,610	)
Other comprehensive income (loss), net of tax
Amounts reclassified from accumulated other comprehensive income (loss), net of tax of $0, $(215), $(215)	—				539			(1)	539
Reclassification to retained earnings	(3,446		)	(2)	—				(3,446		)
Balance at March 31, 2019	$	—			$	(15,517	)		$	(15,517	)
Balance as of September 30, 2017	$	11,044			$	(14,300	)		$	(3,256	)
Other comprehensive (loss) income, net of tax
Other comprehensive loss, before reclassifications, net of tax of $8,217, $0, $8,217	(22,691		)		—				(22,691		)
Amounts reclassified from accumulated other comprehensive (loss) income, net of tax of $(858), $(240), $(1,098)	11,647				512			(1)	12,159
Net current-period other comprehensive (loss) income, net of tax of $7,359, $(240), $7,119	(11,044		)		512				(10,532		)
Balance as of March 31, 2018	$	—			$	(13,788	)		$	(13,788	)

(1) Included in the computation of net periodic pension cost, a component of operations and maintenance expense on the Unaudited Condensed Consolidated Statements of Operations.

(2) Due to the adoption of ASU No. 2016-01, an amendment to ASC 825, Financial Instruments. See Note 2. Summary of Significant Accounting Policies- Recently Adopted Updates to the Accounting Standards Codification section for more details.

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

Accordingly, the following amounts on the Unaudited Condensed Consolidated Statement of Operations for the three and six months ended March 31, 2019, have been adjusted:

(Thousands)	As Previously Reported		Effect of Change			As Adjusted
Three Months Ended
Statements of Operations
Operation and maintenance	$	57,749	$	(952	)	$	56,797
Total operating expenses	$	841,251	$	(952	)	$	840,299
Operating income	$	177,792	$	952		$	178,744
Other income (expense), net	$	1,980	$	(952	)	$	1,028
Six Months Ended
Statements of Operations
Operation and maintenance	$	112,860	$	(1,903	)	$	110,957
Total operating expenses	$	1,471,311	$	(1,903	)	$	1,469,408
Operating income	$	253,037	$	1,903		$	254,940
Other income (expense), net	$	8,907	$	(1,903	)	$	7,004

Accordingly, the following table provides a reconciliation of cash and cash equivalents and restricted cash reported in the Unaudited Condensed Consolidated Balance Sheets to the total amounts in the Unaudited Condensed Consolidated Statements of Cash Flows as follows:

(Thousands)	March 31, 2019		September 30, 2018		March 31, 2018		September 30, 2017
Balance Sheet
Cash and cash equivalents	$	83,160	$	1,458	$	4,928	$	2,226
Restricted cash in other noncurrent assets	405		252		288		243
Statements of Cash Flow
Cash, cash equivalents and restricted cash in the statement of cash flows	$	83,565	$	1,710	$	5,216	$	2,469