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Fair Value Measurements (Table)

12 Months Ended

Sep. 30, 2012

Fair Value Measurements Tables [Abstract]

Fair value measurements table

			Quoted Prices in Active Markets (Level 1)			Significant Other Observable Inputs (Level 2)⁽²⁾			Significant Other Unobservable Inputs (Level 3)			Netting and Cash Collateral ⁽³⁾			September 30, 2012
			Quoted Prices in Active Markets (Level 1)			Significant Other Observable Inputs (Level 2)⁽²⁾			Significant Other Unobservable Inputs (Level 3)			Netting and Cash Collateral ⁽³⁾			September 30, 2012
		(In thousands)
Assets:
Financial instruments
	Natural gas distribution segment	$	-		$	9,365		$	-		$	-		$	9,365
	Nonregulated segment⁽¹⁾		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⁽¹⁾		4,563			191,109			-			(186,451)			9,221
Total liabilities		$	4,563		$	276,734		$	-		$	(186,451)		$	94,846

			Quoted Prices in Active Markets (Level 1)			Significant Other Observable Inputs (Level 2)⁽²⁾			Significant Other Unobservable Inputs (Level 3)			Netting and Cash Collateral ⁽⁴⁾			September 30, 2011
			Quoted Prices in Active Markets (Level 1)			Significant Other Observable Inputs (Level 2)⁽²⁾			Significant Other Unobservable Inputs (Level 3)			Netting and Cash Collateral ⁽⁴⁾			September 30, 2011
		(In thousands)
Assets:
Financial instruments
	Natural gas distribution segment	$	-		$	1,841		$	-		$	-		$	1,841
	Nonregulated segment⁽¹⁾		8,502			104,156			-			(95,156)			17,502
Total financial instruments			8,502			105,997			-			(95,156)			19,343

Hedged portion of gas stored underground			47,940			-			-			-			47,940
Available-for-sale securities
	Money market funds		-			1,823			-			-			1,823
	Registered investment companies		36,444			-			-			-			36,444
	Bonds		-			14,366			-			-			14,366
Total available-for-sale securities			36,444			16,189			-			-			52,633
Total assets		$	92,886		$	122,186		$	-		$	(95,156)		$	119,916

Liabilities:
Financial instruments
	Natural gas distribution segment	$	-		$	81,118		$	-		$	-		$	81,118
	Nonregulated segment⁽¹⁾		9,324			128,384			-			(123,943)			13,765
Total liabilities		$	9,324		$	209,502		$	-		$	(123,943)		$	94,883

Other fair value measurements table

			September 30, 2012
			(In thousands)

	Carrying Amount		$	1,960,131
	Fair Value		$	2,426,434

Available for sale securities

					Gross			Gross
		Amortized			Unrealized			Unrealized			Fair
		Cost			Gain			Loss			Value
		(In thousands)
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
As of September 30, 2011:
	Domestic equity mutual funds	$	27,748		$	4,074		$	-		$	31,822
	Foreign equity mutual funds		4,597			267			(242)			4,622
	Bonds		14,390			10			(34)			14,366
	Money market funds		1,823			-			-			1,823
		$	48,558		$	4,351		$	(276)		$	52,633