Property, Plant and Equipment (tables)

3 Months Ended

Mar. 31, 2015

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	2015		2014		2014
Utility plant in service	$	2,676,280	$	2,605,018	$	2,661,097
Utility construction work in progress	34,048		30,699		24,886
Less: Accumulated depreciation	847,278		838,285		836,510
Utility plant, net	1,863,050		1,797,432		1,849,473
Non-utility plant in service	299,969		297,352		297,295
Non-utility construction work in progress	7,457		6,691		9,282
Less: Accumulated depreciation	35,976		29,972		34,457
Non-utility plant, net	271,450		274,071		272,120
Total property, plant, and equipment	$	2,134,500	$	2,071,503	$	2,121,593
Capital expenditures in accrued liabilities	$	8,451	$	7,769	$	8,757