Property, Plant and Equipment (tables)

12 Months Ended

Dec. 31, 2014

Public Utilities, Property, Plant and Equipment [Abstract]

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

In thousands	2014		2013
Utility plant in service	$	2,661,097	$	2,585,901
Utility construction work in progress	24,886		28,855
Less: Accumulated depreciation	836,510		827,380
Utility plant, net	1,849,473		1,787,376
Non-utility plant in service	297,295		297,330
Non-utility construction work in progress	9,282		6,653
Less: Accumulated depreciation	34,457		28,485
Non-utility plant, net	272,120		275,498
Total property, plant, and equipment	$	2,121,593	$	2,062,874
Capital expenditures in accrued liabilities	$	8,757	$	10,691