Summary Of Significant Accounting Policies (Tables)

9 Months Ended

Jun. 30, 2020

Accounting Policies [Abstract]

Schedule of Cash, Cash Equivalents and Restricted Cash

The components, as reported on the Company’s Consolidated Balance Sheets, of the total cash, cash equivalents, and restricted cash presented on the Statement of Cash Flows are as follows (in thousands):

	Nine Months Ended June 30, 2020				Nine Months Ended June 30, 2019
	Balance at October 1, 2019		Balance at June 30, 2020		Balance at October 1, 2018		Balance at June 30, 2019
Cash and Temporary Cash Investments	$	20,428	$	556,264	$	229,606	$	87,515
Hedging Collateral Deposits	6,832		7,699		3,441		6,835
Cash, Cash Equivalents, and Restricted Cash	$	27,260	$	563,963	$	233,047	$	94,350

Components of Accumulated Other Comprehensive Loss

The components of Accumulated Other Comprehensive Loss and changes for the nine months ended June 30, 2020 and 2019, net of related tax effect, are as follows (amounts in parentheses indicate debits) (in thousands): 

	Gains and Losses on Derivative Financial Instruments		Gains and Losses on Securities Available for Sale		Funded Status of the Pension and Other Post-Retirement Benefit Plans		Total
Three Months Ended June 30, 2020
Balance at April 1, 2020	$	67,913	$	—	$	(86,830)	$	(18,917)
Other Comprehensive Gains and Losses Before Reclassifications	3,563		—		—		3,563
Amounts Reclassified From Other Comprehensive Income (Loss)	(26,440)		—		—		(26,440)
Balance at June 30, 2020	$	45,036	$	—	$	(86,830)	$	(41,794)
Nine Months Ended June 30, 2020
Balance at October 1, 2019	$	34,675	$	—	$	(86,830)	$	(52,155)
Other Comprehensive Gains and Losses Before Reclassifications	59,388		—		—		59,388
Amounts Reclassified From Other Comprehensive Income (Loss)	(49,977)		—		—		(49,977)
Cumulative Effect of Adoption of Authoritative Guidance for Hedging	950		—		—		950
Balance at June 30, 2020	$	45,036	$	—	$	(86,830)	$	(41,794)
Three Months Ended June 30, 2019
Balance at April 1, 2019	$	4,562	$	—	$	(58,848)	$	(54,286)
Other Comprehensive Gains and Losses Before Reclassifications	24,376		—		—		24,376
Amounts Reclassified From Other Comprehensive Income (Loss)	(2,756)		—		—		(2,756)
Balance at June 30, 2019	$	26,182	$	—	$	(58,848)	$	(32,666)
Nine Months Ended June 30, 2019
Balance at October 1, 2018	$	(28,611)	$	7,437	$	(46,576)	$	(67,750)
Other Comprehensive Gains and Losses Before Reclassifications	38,185		—		—		38,185
Amounts Reclassified From Other Comprehensive Income (Loss)	14,742		—		—		14,742
Reclassification Adjustment for the Cumulative Effect of Adoption of Authoritative Guidance for Financial Assets and Liabilities	—		(7,437)		—		(7,437)
Reclassification of Stranded Tax Effects Related to the 2017 Tax Reform Act	1,866		—		(12,272)		(10,406)
Balance at June 30, 2019	$	26,182	$	—	$	(58,848)	$	(32,666)

Schedule of Reclassifications Out of Accumulated Other Comprehensive Loss

The details about the reclassification adjustments out of accumulated other comprehensive loss for the three and nine months ended June 30, 2020 and 2019 are as follows (amounts in parentheses indicate debits to the income statement) (in thousands):

Details About Accumulated Other Comprehensive Loss Components	Amount of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Loss				Affected Line Item in the Statement Where Net Income is Presented
	Three Months Ended June 30,		Nine Months Ended June 30,
	2020	2019	2020	2019
Gains (Losses) on Derivative Financial Instrument Cash Flow Hedges:
Commodity Contracts	$36,726	$4,091	$67,663	($18,692)	Operating Revenues
Commodity Contracts	(22)	—	1,890	(1,182)	Purchased Gas
Foreign Currency Contracts	(357)	(222)	(820)	(624)	Operating Revenues
	36,347	3,869	68,733	(20,498)	Total Before Income Tax
	(9,907)	(1,113)	(18,756)	5,756	Income Tax Expense
	$26,440	$2,756	$49,977	($14,742)	Net of Tax

Schedule of Other Current Assets

The components of the Company’s Other Current Assets are as follows (in thousands):

	At June 30, 2020		At September 30, 2019
Prepayments	$	14,289	$	12,728
Prepaid Property and Other Taxes	11,684		14,361
Federal Income Taxes Receivable	—		42,388
State Income Taxes Receivable	3,106		8,579
Fair Values of Firm Commitments	4,384		7,538
Regulatory Assets	14,189		11,460
	$	47,652	$	97,054

Schedule of Other Accruals and Current Liabilities

The components of the Company’s Other Accruals and Current Liabilities are as follows (in thousands):

	At June 30, 2020		At September 30, 2019
Accrued Capital Expenditures	$	35,645	$	33,713
Regulatory Liabilities	42,598		50,332
Reserve for Gas Replacement	10,622		—
Liability for Royalty and Working Interests	12,061		18,057
Federal Income Taxes Payable	159		—
Non-Qualified Benefit Plan Liability	13,194		13,194
Other	24,065		24,304
	$	138,344	$	139,600