Property, Plant and Equipment (tables)

3 Months Ended

Mar. 31, 2014

Public Utilities, Property, Plant and Equipment [Abstract]

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

	March 31,				December 31,
In thousands	2014		2013		2013
Utility plant in service	$	2,605,018	$	2,452,419	$	2,585,901
Utility construction work in progress	30,699		53,474		28,855
Less: Accumulated depreciation	838,285		799,864		827,380
Utility plant, net	1,797,432		1,706,029		1,787,376
Non-utility plant in service	297,352		296,228		297,330
Non-utility construction work in progress	6,691		6,552		6,653
Less: Accumulated depreciation	29,972		24,697		28,485
Non-utility plant, net	274,071		278,083		275,498
Total property, plant, and equipment	$	2,071,503	$	1,984,112	$	2,062,874
Capital expenditures acquired with accrued liabilities	$	7,769	$	7,621	$	10,456