Property, Plant and Equipment (tables)

12 Months Ended

Dec. 31, 2013

Public Utilities, Property, Plant and Equipment [Abstract]

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

In thousands	2013		2012
Utility plant in service	$	2,585,901	$	2,435,886
Utility construction work in progress	28,855		46,831
Less: Accumulated depreciation	827,380		789,201
Utility plant, net	1,787,376		1,693,516
Non-utility plant in service	297,330		296,781
Non-utility construction work in progress	6,653		6,510
Less: Accumulated depreciation	28,485		23,195
Non-utility plant, net	275,498		280,096
Total property, plant, and equipment	$	2,062,874	$	1,973,612