Property, Plant and Equipment (tables)

9 Months Ended

Sep. 30, 2014

Public Utilities, Property, Plant and Equipment [Abstract]

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

	September 30,				December 31,
In thousands	2014		2013		2013
Utility plant in service	$	2,655,136	$	2,482,034	$	2,585,901
Utility construction work in progress	31,778		80,325		28,855
Less: Accumulated depreciation	850,590		818,644		827,380
Utility plant, net	1,836,324		1,743,715		1,787,376
Non-utility plant in service	297,199		296,022		297,330
Non-utility construction work in progress	6,549		7,479		6,653
Less: Accumulated depreciation	32,978		27,702		28,485
Non-utility plant, net	270,770		275,799		275,498
Total property, plant, and equipment	$	2,107,094	$	2,019,514	$	2,062,874
Capital expenditures in accrued liabilities	$	11,834	$	9,265	$	10,691