We report certain assets and liabilities at fair value, which is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). We record cash and cash equivalents, accounts receivable and accounts payable at carrying value, which substantially approximates fair value due to the short-term nature of these assets and liabilities. For other financial assets and liabilities, we primarily use quoted market prices and other observable market pricing information to minimize the use of unobservable pricing inputs in our measurements when determining fair value. The methods used to determine fair value for our assets and liabilities are fully described in Note 2 to the financial statements in our Annual Report on Form 10-K for the fiscal year ended September 30, 2012. During the three and six months ended March 31, 2013, there were no changes in these methods.

Fair value measurements also apply to the valuation of our pension and postretirement plan assets. Current accounting guidance requires employers to annually disclose information about fair value measurements of the assets of a defined benefit pension or other postretirement plan. The fair value of these assets is presented in Note 9 to the financial statements in our Annual Report on Form 10-K for the fiscal year ending September 30, 2012.

The classification of our fair value measurements requires judgment regarding the degree to which market data are observable or corroborated by observable market data. Authoritative accounting literature establishes a fair value hierarchy that prioritizes the inputs used to measure fair value based on observable and unobservable data. The hierarchy categorizes the inputs into three levels, with the highest priority given to unadjusted quoted prices in active markets for identical assets and liabilities (Level 1), with the lowest priority given to unobservable inputs (Level 3). The following tables summarize, by level within the fair value hierarchy, our assets and liabilities that were accounted for at fair value on a recurring basis as of March 31, 2013 and September 30, 2012. Assets and liabilities are categorized in their entirety based on the lowest level of input that is significant to the fair value measurement.

		Quoted		Significant		Significant
		Prices in		Other		Other
		Active		Observable		Unobservable		Netting and
		Markets		Inputs		Inputs		Cash		March 31,
		(Level 1)		(Level 2)⁽¹⁾		(Level 3)		Collateral⁽²⁾		2013
			(In thousands)

Assets:
Financial instruments
	Natural gas distribution segment	$	-	$	40,185	$	-	$	-	$	40,185
	Nonregulated segment		489		139,435		-		(131,972)		7,952
Total financial instruments			489		179,620		-		(131,972)		48,137

Hedged portion of gas stored
	underground		89,342		-		-		-		89,342
Available-for-sale securities
	Money market funds		-		11,761		-		-		11,761
	Registered investment companies		31,092		-		-		-		31,092
	Bonds		-		23,617		-		-		23,617
Total available-for-sale securities			31,092		35,378		-		-		66,470
Total assets		$	120,923	$	214,998	$	-	$	(131,972)	$	203,949

Liabilities:
Financial instruments
	Natural gas distribution segment	$	-	$	59	$	-	$	-	$	59
	Nonregulated segment		969		142,974		-		(143,943)		-
Total liabilities		$	969	$	143,033	$	-	$	(143,943)	$	59

		Quoted		Significant		Significant
		Prices in		Other		Other
		Active		Observable		Unobservable		Netting and
		Markets		Inputs		Inputs		Cash		September 30,
		(Level 1)		(Level 2)⁽¹⁾		(Level 3)		Collateral⁽³⁾		2012
			(In thousands)

Assets:
Financial instruments
	Natural gas distribution segment	$	-	$	9,365	$	-	$	-	$	9,365
	Nonregulated segment		714		179,835		-		(162,776)		17,773
Total financial instruments			714		189,200		-		(162,776)		27,138

Hedged portion of gas stored
	underground		67,192		-		-		-		67,192
Available-for-sale securities
	Money market funds		-		1,634		-		-		1,634
	Registered investment companies		40,212		-		-		-		40,212
	Bonds		-		22,552		-		-		22,552
Total available-for-sale securities			40,212		24,186		-		-		64,398
Total assets		$	108,118	$	213,386	$	-	$	(162,776)	$	158,728

Liabilities:
Financial instruments
	Natural gas distribution segment	$	-	$	85,625	$	-	$	-	$	85,625
	Nonregulated segment		4,563		191,109		-		(186,451)		9,221
Total liabilities		$	4,563	$	276,734	$	-	$	(186,451)	$	94,846

(1) Our Level 2 measurements consist of over-the-counter options and swaps which are valued using a market-based approach in which observable market prices are adjusted for criteria specific to each instrument, such as the strike price, notional amount or basis differences, municipal and corporate bonds which are valued based on the most recent available quoted market prices and money market funds which are valued at cost.

(2) This column reflects adjustments to our gross financial instrument assets and liabilities to reflect netting permitted under our master netting agreements and the relevant authoritative accounting literature. In addition, as of March 31, 2013, we had $12.0 million of cash held in margin accounts to collateralize certain financial instruments. Of this amount, $8.3 million was used to offset current risk management liabilities under master netting arrangements and the remaining $3.7 million is classified as current risk management assets.

(3) This column reflects adjustments to our gross financial instrument assets and liabilities to reflect netting permitted under our master netting agreements and the relevant authoritative accounting literature. In addition, as of September 30, 2012 we had $23.7 million of cash held in margin accounts to collateralize certain financial instruments. Of this amount, $5.9 million was used to offset current risk management liabilities under master netting arrangements and the remaining $17.8 million is classified as current risk management assets.

				Gross		Gross
		Amortized		Unrealized		Unrealized		Fair
		Cost		Gain		Loss		Value
		(In thousands)
As of March 31, 2013:
	Domestic equity mutual funds	$	17,998	$	6,656	$	-	$	24,654
	Foreign equity mutual funds		5,168		1,270		-		6,438
	Bonds		23,388		230		(1)		23,617
	Money market funds		11,761		-		-		11,761
		$	58,315	$	8,156	$	(1)	$	66,470
As of September 30, 2012:
	Domestic equity mutual funds	$	25,779	$	8,183	$	-	$	33,962
	Foreign equity mutual funds		5,568		682		-		6,250
	Bonds		22,358		196		(2)		22,552
	Money market funds		1,634		-		-		1,634
		$	55,339	$	9,061	$	(2)	$	64,398

At March 31, 2013 and September 30, 2012, our available-for-sale securities included $42.9 million and $41.8 million related to assets held in separate rabbi trusts for our supplemental executive benefit plans. At March 31, 2013, we maintained investments in bonds that have contractual maturity dates ranging from May 2013 through June 2017. During the six months ended March 31, 2013, we recognized a gain of $2.7 million on the sale of certain assets in the rabbi trusts.

These securities are reported at market value with unrealized gains and losses shown as a component of accumulated other comprehensive income (loss). We regularly evaluate the performance of these investments on a fund by fund basis for impairment, taking into consideration the fund's purpose, volatility and current returns. If a determination is made that a decline in fair value is other than temporary, the related fund is written down to its estimated fair value and the other-than-temporary impairment is recognized in the income statement.

Our debt is recorded at carrying value. The fair value of our debt is determined using third party market value quotations, which are considered Level 1 fair value measurements for debt instruments with a recent, observable trade or Level 2 fair value measurements for debt instruments where fair value is determined using the most recent available quoted market price. The following table presents the carrying value and fair value of our debt as of March 31, 2013:

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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