Income Tax

9 Months Ended

Sep. 30, 2020

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 September 30,
	NW Holdings						NW Natural
In thousands	2020			2019			2020			2019
Income tax at statutory rate (federal)	$	(5,048)		$	(4,799)		$	(5,518)		$	(4,536)
State	(1,452)			(1,708)			(1,595)			(1,641)
Increase (decrease):
Differences required to be flowed-through by regulatory commissions	1,051			2,090			1,051			2,090
Other, net	86			74			5			74
Total provision for income taxes on continuing operations	$	(5,363)		$	(4,343)		$	(6,057)		$	(4,013)
Effective income tax rate for continuing operations	22.3		%	19.0		%	23.1		%	18.6		%

	Nine Months Ended September 30,
	NW Holdings						NW Natural
In thousands	2020			2019			2020			2019
Income tax at statutory rate (federal)	$	6,628		$	6,703		$	6,550		$	7,388
State	1,892			1,797			1,861			1,975
Increase (decrease):
Differences required to be flowed-through by regulatory commissions	(1,301)			(3,207)			(1,301)			(3,207)
Other, net	(127)			(336)			(168)			(336)
Total provision for income taxes on continuing operations	$	7,092		$	4,957		$	6,942		$	5,820
Effective income tax rate for continuing operations	22.5		%	15.5		%	22.3		%	16.5		%