Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2021

Public Utilities, Property, Plant and Equipment [Abstract]

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

The following table sets forth the major classifications of property, plant, and equipment and accumulated depreciation of continuing operations at December 31:

In thousands	2021		2020
NW Natural:
NGD plant in service	$	3,721,939	$	3,548,543
NGD work in progress	135,398		63,901
Less: Accumulated depreciation	1,098,715		1,055,809
NGD plant, net	2,758,622		2,556,635
Other plant in service	69,332		66,300
Other construction work in progress	4,971		5,032
Less: Accumulated depreciation	20,646		19,637
Other plant, net	53,657		51,695
Total property, plant, and equipment	$	2,812,279	$	2,608,330
Other (NW Holdings):
Other plant in service	$	65,603	$	50,263
Less: Accumulated depreciation	6,512		3,823
Other plant, net	59,091		46,440
NW Holdings:
Total property, plant, and equipment	$	2,871,370	$	2,654,770
NW Natural:
Capital expenditures in accrued liabilities	$	37,537	$	25,129
NW Holdings:
Capital expenditures in accrued liabilities	$	38,333	$	25,129