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Financial Instruments (Tables)
 6 Months Ended
Mar. 31, 2020
Financial Instruments, Owned, at Fair Value [Abstract]  
Long-Term Debt Based on these criteria, the fair market value of long-term debt, including current portion, was as follows (in thousands): 
 
March 31, 2020
 
September 30, 2019
 
Carrying Amount
 
Fair Value
 
Carrying Amount
 
Fair Value
Long-Term Debt
$
2,134,964

 
$
1,948,127

 
$
2,133,718

 
$
2,257,085
Schedule Of Other Investments The components of the Company's Other Investments are as follows (in thousands):
 
At March 31, 2020
 
At September 30, 2019
 
 
 
 
Life Insurance Contracts
$
41,417

 
$
41,074

Equity Mutual Fund
31,956

 
40,660

Fixed Income Mutual Fund
63,094

 
62,339

Marketable Equity Securities
577

 
844

 
$
137,044

 
$
144,917
Schedule of Derivative Financial Instruments Designated And Qualifying As Cash Flow Hedges On The Statement Of Financial Performance
The Effect of Derivative Financial Instruments on the Statement of Financial Performance for the
Three Months Ended March 31, 2020 and 2019 (Thousands of Dollars)
Derivatives in Cash Flow Hedging Relationships
Amount of Derivative Gain or (Loss) Recognized in Other Comprehensive Income (Loss) on the Consolidated Statement of Comprehensive Income (Loss)
for the
 Three Months Ended
 March 31,
Location of Derivative Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) on the Consolidated Balance Sheet into the Consolidated Statement of Income
Amount of Derivative Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) on the Consolidated Balance Sheet into the Consolidated Statement of Income for the
 Three Months Ended
 March 31,
 
2020
2019
 
2020
2019
Commodity Contracts
$
81,108

$
(27,228
)
Operating Revenue
$
23,396

$
(4,260
)
Commodity Contracts
(134
)
(54
)
Purchased Gas
1,909

(280
)
Foreign Currency Contracts
(4,670
)
1,282

Operating Revenue
(271
)
(199
)
Total
$
76,304

$
(26,000
)
 
$
25,034

$
(4,739
)


The Effect of Derivative Financial Instruments on the Statement of Financial Performance for the
Six Months Ended March 31, 2020 and 2019 (Thousands of Dollars)
Derivatives in Cash Flow Hedging Relationships
Amount of Derivative Gain or (Loss) Recognized in Other Comprehensive Income (Loss) on the Consolidated Statement of Comprehensive Income (Loss)
for the
 Six Months Ended
 March 31,
Location of Derivative Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) on the Consolidated Balance Sheet into the Consolidated Statement of Income
Amount of Derivative Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) on the Consolidated Balance Sheet into the Consolidated Statement of Income for the
 Six Months Ended
 March 31,
 
2020
2019
 
2020
2019
Commodity Contracts
$
79,553

$
22,825

Operating Revenue
$
30,937

$
(22,782
)
Commodity Contracts
997

(1,333
)
Purchased Gas
1,911

(1,182
)
Foreign Currency Contracts
(3,751
)
(2,102
)
Operating Revenue
(462
)
(420
)
Total
$
76,799

$
19,390

 
$
32,386

$
(24,384
)
 
 
 
 
 
 
Schedule Of Derivatives And Hedged Items in Fair Value Hedging Relationships For derivative instruments that are designated and qualify as a fair value hedge, the gain or loss on the derivative as well as the offsetting gain or loss on the hedged item attributable to the hedged risk completely offset each other in current earnings, as shown below.

Derivatives in Fair Value Hedging Relationships
Location of Gain or (Loss) on Derivative and Hedged Item Recognized in the Consolidated Statement of Income
Amount of Gain or (Loss) on Derivative Recognized in the Consolidated Statement of Income for the
Six Months Ended March 31, 2020
(In Thousands)
Amount of Gain or (Loss) on the Hedged Item Recognized in the Consolidated Statement of Income for the
Six Months Ended March 31, 2020
(In Thousands)
Commodity Contracts
Operating Revenues
$
(4,994
)
$
4,994

Commodity Contracts
Purchased Gas
$
431

$
(431
)
 
 
$
(4,563
)
$
4,563