Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2018

Public Utilities, Property, Plant and Equipment [Abstract]

Public Utility Property, Plant, and Equipment

The following table sets forth the major classifications of our property, plant, and equipment and accumulated depreciation:

	March 31,				December 31,
In thousands	2018		2017		2017
Utility plant in service	$	3,003,962	$	2,867,271	$	2,975,217
Utility construction work in progress	177,133		76,631		159,924
Less: Accumulated depreciation	954,858		914,179		942,879
Utility plant, net	2,226,237		2,029,723		2,192,262
Non-utility plant in service	76,436		299,324		75,639
Non-utility construction work in progress	4,355		3,951		4,671
Less: Accumulated depreciation	17,918		46,157		17,598
Non-utility plant, net	62,873		257,118		62,712
Total property, plant, and equipment	$	2,289,110	$	2,286,841	$	2,254,974
Capital expenditures in accrued liabilities	$	21,923	$	11,564	$	34,976