Segment Reporting (tables)

12 Months Ended

Dec. 31, 2011

Schedule of Segment Reporting Information, by Segment [Table Text Block]

Thousands		Utility		Gas Storage		Other		Total
2011
Net operating revenues	$	342,970	$	26,354	$	109	$	369,433
Depreciation and amortization		63,843		6,161		-		70,004
Income from operations		135,722		9,090		33		144,845
Net income		60,527		4,101		(730)		63,898
Total assets at December 31, 2011		2,435,888		294,637		16,049		2,746,574
2010
Net operating revenues	$	346,148	$	21,249	$	184	$	367,581
Depreciation and amortization		62,661		2,463		-		65,124
Income from operations		145,688		11,855		62		157,605
Net income		66,262		6,110		295		72,667
Total assets at December 31, 2010		2,310,388		282,945		23,283		2,616,616
2009
Net operating revenues	$	357,005	$	19,738	$	144	$	376,887
Depreciation and amortization		61,472		1,342		-		62,814
Income from operations		142,228		16,442		46		158,716
Net income		65,960		8,923		239		75,122

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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