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Fair Value Measurements
9 Months Ended
Jun. 30, 2019
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
 
The FASB authoritative guidance regarding fair value measurements establishes a fair-value hierarchy and prioritizes the inputs used in valuation techniques that measure fair value. Those inputs are prioritized into three levels. Level 1 inputs are unadjusted quoted prices in active markets for assets or liabilities that the Company can access at the measurement date. Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly at the measurement date. Level 3 inputs are unobservable inputs for the asset or liability at the measurement date. The Company’s assessment of the significance of a particular input to the fair value measurement requires judgment, and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels.
 
The following table sets forth, by level within the fair value hierarchy, the Company's financial assets and liabilities (as applicable) that were accounted for at fair value on a recurring basis as of June 30, 2019 and September 30, 2018.  Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The fair value presentation for over the counter swaps combines gas and oil swaps because a significant number of the counterparties enter into both gas and oil swap agreements with the Company.  
Recurring Fair Value Measures
At fair value as of June 30, 2019
(Thousands of Dollars)   
Level 1
 
Level 2
 
Level 3
 
Netting Adjustments(1)
 
Total(1)
Assets:
 

 
 

 
 

 
 

 
 

Cash Equivalents – Money Market Mutual Funds
$
75,375

 
$

 
$

 
$

 
$
75,375

Derivative Financial Instruments:
 

 
 

 
 

 
 

 
 

Commodity Futures Contracts – Gas
1,367

 

 

 
(1,367
)
 

Over the Counter Swaps – Gas and Oil

 
44,929

 

 
(6,850
)
 
38,079

Foreign Currency Contracts

 
78

 

 
(1,500
)
 
(1,422
)
Other Investments:
 

 
 

 
 

 
 

 
 

Balanced Equity Mutual Fund
40,313

 

 

 

 
40,313

Fixed Income Mutual Fund
55,034

 

 

 

 
55,034

Common Stock – Financial Services Industry
1,841

 

 

 

 
1,841

Hedging Collateral Deposits
6,835

 

 

 

 
6,835

Total                                           
$
180,765

 
$
45,007

 
$

 
$
(9,717
)
 
$
216,055

 
 
 
 
 
 
 
 
 
 
Liabilities:
 

 
 

 
 

 
 

 
 

Derivative Financial Instruments:
 

 
 

 
 

 
 

 
 

Commodity Futures Contracts – Gas
$
5,686

 
$

 
$

 
$
(1,367
)
 
$
4,319

Over the Counter Swaps – Gas and Oil

 
7,071

 

 
(6,850
)
 
221

Foreign Currency Contracts

 
1,523

 

 
(1,500
)
 
23

Total
$
5,686

 
$
8,594

 
$

 
$
(9,717
)
 
$
4,563

Total Net Assets/(Liabilities)
$
175,079

 
$
36,413

 
$

 
$

 
$
211,492

 
Recurring Fair Value Measures
At fair value as of September 30, 2018
(Thousands of Dollars)   
Level 1
 
Level 2
 
Level 3
 
Netting Adjustments(1)
 
Total(1)
Assets:
 

 
 

 
 

 
 

 
 

Cash Equivalents – Money Market Mutual Funds
$
215,272

 
$

 
$

 
$

 
$
215,272

Derivative Financial Instruments:
 

 
 

 
 

 
 

 
 

Commodity Futures Contracts – Gas
1,075

 

 

 
(1,075
)
 

Over the Counter Swaps – Gas and Oil

 
26,074

 

 
(17,041
)
 
9,033

Foreign Currency Contracts

 
443

 

 
(443
)
 

Other Investments:
 

 
 

 
 

 
 

 
 

Balanced Equity Mutual Fund
38,468

 

 

 

 
38,468

Fixed Income Mutual Fund
51,331

 

 

 

 
51,331

Common Stock – Financial Services Industry
2,776

 

 

 

 
2,776

Hedging Collateral Deposits
3,441

 

 

 

 
3,441

Total                                           
$
312,363

 
$
26,517

 
$

 
$
(18,559
)
 
$
320,321

 
 
 
 
 
 
 
 
 
 
Liabilities:
 

 
 

 
 

 
 

 
 

Derivative Financial Instruments:
 

 
 

 
 

 
 

 
 

Commodity Futures Contracts – Gas
$
2,412

 
$

 
$

 
$
(1,075
)
 
$
1,337

Over the Counter Swaps – Gas and Oil

 
64,224

 

 
(17,041
)
 
47,183

     Foreign Currency Contracts

 
959

 

 
(443
)
 
516

Total
$
2,412

 
$
65,183

 
$

 
$
(18,559
)
 
$
49,036

Total Net Assets/(Liabilities)
$
309,951

 
$
(38,666
)
 
$

 
$

 
$
271,285


(1) 
Netting Adjustments represent the impact of legally-enforceable master netting arrangements that allow the Company to net gain and loss positions held with the same counterparties. The net asset or net liability for each counterparty is recorded as an asset or liability on the Company’s balance sheet.
 
Derivative Financial Instruments
 
At June 30, 2019 and September 30, 2018, the derivative financial instruments reported in Level 1 consist of natural gas NYMEX and ICE futures contracts used in the Company’s Energy Marketing segment. Hedging collateral deposits were $6.8 million at June 30, 2019 and $3.4 million at September 30, 2018, which were associated with these futures contracts and have been reported in Level 1 as well. The derivative financial instruments reported in Level 2 at June 30, 2019 and September 30, 2018 consist of natural gas price swap agreements used in the Company’s Exploration and Production and Energy Marketing segments, crude oil price swap agreements used in the Company’s Exploration and Production segment, basis hedge swap agreements used in the Company's Energy Marketing segment and foreign currency contracts used in the Company's Exploration and Production segment. The fair value of the Level 2 price swap agreements is based on an internal, discounted cash flow model that uses observable inputs (i.e. LIBOR based discount rates and basis differential information, if applicable, at active natural gas and crude oil trading markets). The fair value of the Level 2 foreign currency contracts is determined using the market approach based on observable market transactions of forward Canadian currency rates. 
 
The accounting rules for fair value measurements and disclosures require consideration of the impact of nonperformance risk (including credit risk) from a market participant perspective in the measurement of the fair value of assets and liabilities.  At June 30, 2019, the Company determined that nonperformance risk would have no material impact on its financial position or results of operation.  To assess nonperformance risk, the Company considered information such as any applicable collateral posted, master netting arrangements, and applied a market-based method by using the counterparty's (assuming the derivative is in a gain position) or the Company’s (assuming the derivative is in a loss position) credit default swaps rates.
 
For the quarters ended June 30, 2019 and June 30, 2018, there were no assets or liabilities measured at fair value and classified as Level 3. For the quarters ended June 30, 2019 and June 30, 2018, no transfers in or out of Level 1 or Level 2 occurred.