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Summary Of Significant Accounting Policies (Tables)
 3 Months Ended
Dec. 31, 2017
Accounting Policies [Abstract]  
Components Of Accumulated Other Comprehensive Loss
The components of Accumulated Other Comprehensive Loss and changes for the three months ended December 31, 2017 and 2016, 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 December 31, 2017
 
 
 
 
Balance at October 1, 2017
$
20,801

$
7,562

$
(58,486
)
$
(30,123
)
Other Comprehensive Gains and Losses Before Reclassifications
(3,194
)
21

—

(3,173
)
Amounts Reclassified From Other Comprehensive Loss
(7,351
)
(272
)
—

(7,623
)
Balance at December 31, 2017
$
10,256

$
7,311

$
(58,486
)
$
(40,919
)
Three Months Ended December 31, 2016
 
 
 
 
Balance at October 1, 2016
$
64,782

$
6,054

$
(76,476
)
$
(5,640
)
Other Comprehensive Gains and Losses Before Reclassifications
(30,449
)
(539
)
—

(30,988
)
Amounts Reclassified From Other Comprehensive Loss
(17,763
)
(468
)
—

(18,231
)
Balance at December 31, 2016
$
16,570

$
5,047

$
(76,476
)
$
(54,859
)
 
 
 
 
 
Schedule Of Reclassifications Out Of Accumulated Other Comprehensive Loss
The details about the reclassification adjustments out of accumulated other comprehensive loss for the three months ended December 31, 2017 and 2016 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 December 31,
 
 
2017
2016
 
Gains (Losses) on Derivative Financial Instrument Cash Flow Hedges:
 
 
 
     Commodity Contracts

$12,842


$31,320

Operating Revenues
     Commodity Contracts
196

(460
)
Purchased Gas
     Foreign Currency Contracts
(490
)
(143
)
Operation and Maintenance Expense
Gains (Losses) on Securities Available for Sale
430

741

Other Income
 
12,978

31,458

Total Before Income Tax
 
(5,355
)
(13,227
)
Income Tax Expense
 

$7,623


$18,231

Net of Tax
Schedule Of Other Current Assets
The components of the Company’s Other Current Assets are as follows (in thousands):
                            
At December 31, 2017
 
At September 30, 2017
 
 
 
 
Prepayments
$
7,259

 
$
10,927

Prepaid Property and Other Taxes
14,972

 
13,974

State Income Taxes Receivable
9,164

 
9,689

Fair Values of Firm Commitments
3,218

 
1,031

Regulatory Assets
13,301

 
15,884

 
$
47,914

 
$
51,505
Schedule Of Other Accruals And Current Liabilities
The components of the Company’s Other Accruals and Current Liabilities are as follows (in thousands):
                            
At December 31, 2017
 
At September 30, 2017
 
 
 
 
Accrued Capital Expenditures
$
28,488

 
$
37,382

Regulatory Liabilities
38,920

 
34,059

Reserve for Gas Replacement
1,739

 
—

Federal Income Taxes Payable
8,688

 
1,775

2017 Tax Reform Act Refund
6,000

 
—

Other
37,761

 
38,673

 
$
121,596

 
$
111,889