Property, Plant and Equipment (tables)

6 Months Ended

Jun. 30, 2014

Public Utilities, Property, Plant and Equipment [Abstract]

Major Classifications Of Property, Plant And Equipment And Accumulated Depreciation [Text Block]

	June 30,				December 31,
In thousands	2014		2013		2013
Utility plant in service	$	2,624,774	$	2,468,853	$	2,585,901
Utility construction work in progress	36,798		61,283		28,855
Less: Accumulated depreciation	847,828		807,652		827,380
Utility plant, net	1,813,744		1,722,484		1,787,376
Non-utility plant in service	297,269		296,167		297,330
Non-utility construction work in progress	6,385		6,780		6,653
Less: Accumulated depreciation	31,468		26,199		28,485
Non-utility plant, net	272,186		276,748		275,498
Total property, plant, and equipment	$	2,085,930	$	1,999,232	$	2,062,874
Capital expenditures in accrued liabilities	$	9,826	$	7,374	$	10,456