Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2019

Property, Plant and Equipment [Abstract]

Public Utility Property, Plant, and Equipment [Table Text Block]

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

	March 31,				December 31,
In thousands	2019		2018		2018
NW Natural:
NGD plant in service	$	3,159,754	$	3,003,962	$	3,134,122
NGD work in progress	204,938		177,133		204,978
Less: Accumulated depreciation	985,961		954,858		974,252
NGD plant, net	2,378,731		2,226,237		2,364,848
Other plant in service	65,283		65,353		66,009
Other construction work in progress	5,329		4,252		5,330
Less: Accumulated depreciation	18,851		17,715		18,603
Other plant, net (1)	51,761		51,890		52,736
Total property, plant, and equipment	$	2,430,492	$	2,278,127	$	2,417,584
Other (NW Holdings):
Other plant in service	$	4,156	$	375	$	4,051
Less: Accumulated depreciation	305		200		263
Other plant, net (1)	$	3,851	$	175	$	3,788
NW Holdings:
Total property, plant, and equipment	$	2,434,343	$	2,278,302	$	2,421,372
NW Natural and NW Holdings:
Capital expenditures in accrued liabilities	$	25,035	$	21,855	$	23,676

⁽¹⁾ NW Natural previously reported other balances were restated due to certain assets and liabilities now being classified as discontinued operations assets and liabilities in its balance sheets. See Note 17 for further discussion.