Income Tax

6 Months Ended

Jun. 30, 2021

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation

The effective income tax rate varied from the federal statutory rate due to the following:

	Three Months Ended June 30,
	NW Holdings						NW Natural
In thousands	2021			2020			2021			2020
Income tax at statutory rate (federal)	$	(210)		$	(1,429)		$	184		$	(1,287)
State income tax	(48)			(333)			41			(281)
Increase (decrease):
Differences required to be flowed-through by regulatory commissions	21			173			21			173
Other, net	(40)			(83)			42			(24)
Total provision for income taxes on continuing operations	$	(277)		$	(1,672)		$	288		$	(1,419)
Effective income tax rate for continuing operations	27.7		%	24.6		%	32.8		%	23.1		%

	Six Months Ended June 30,
	NW Holdings						NW Natural
In thousands	2021			2020			2021			2020
Income tax at statutory rate (federal)	$	16,598		$	11,676		$	17,123		$	12,068
State income tax	7,260			3,344			7,366			3,456
Increase (decrease):
Differences required to be flowed-through by regulatory commissions	(3,584)			(2,352)			(3,584)			(2,352)
Other, net	(30)			(213)			(65)			(173)
Total provision for income taxes on continuing operations	$	20,244		$	12,455		$	20,840		$	12,999
Effective income tax rate for continuing operations	25.6		%	22.4		%	25.6		%	22.6		%