Segment Reporting (tables)

3 Months Ended

Mar. 31, 2015

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



	Three Months Ended March 31,
In thousands	Utility		Gas Storage		Other		Total
2015
Operating revenues	$	256,306	$	5,303	$	56	$	261,665
Depreciation and amortization	18,475		1,636		—		20,111
Income from operations	51,880		1,055		66		53,001
Net income	28,335		114		37		28,486
Capital expenditures	25,809		1,326		—		27,135
Total assets at March 31, 2015	2,696,506		270,992		14,903		2,982,401
2014
Operating revenues	$	285,495	$	7,835	$	56	$	293,386
Depreciation and amortization	17,967		1,622		—		19,589
Income from operations	71,457		3,553		18		75,028
Net income	36,019		1,627		238		37,884
Capital expenditures	25,350		238		—		25,588
Total assets at March 31, 2014	2,506,930		307,055		16,399		2,830,384

Total assets at December 31, 2014	$	2,775,011	$	273,813	$	16,121	$	3,064,945

Utility Margin [Table Text Block]



	Three Months Ended March 31,
In thousands	2015		2014
Utility margin calculation:
Utility operating revenues	$	256,306	$	285,495
Less: Utility cost of gas	125,705		155,201
Utility margin	$	130,601	$	130,294

- 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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