Income Tax

6 Months Ended

Jun. 30, 2023

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	2023			2022			2023			2022
Income tax at statutory rate (federal)	$	312		$	460		$	442		$	744
State income tax	211			161			217			219
Increase (decrease):
Differences required to be flowed-through by regulatory commissions	(161)			(62)			(160)			(62)
Other, net	(119)			(89)			(177)			(91)
Total benefit for income taxes	$	243		$	470		$	322		$	810
Effective income tax rate	16.3		%	21.5		%	15.3		%	22.9		%

	Six Months Ended June 30,
	NW Holdings						NW Natural
In thousands	2023			2022			2023			2022
Income tax at statutory rate (federal)	$	20,644		$	16,243		$	21,854		$	16,859
State income tax	8,360			6,674			8,623			6,803
Increase (decrease):
Differences required to be flowed-through by regulatory commissions	(3,070)			(3,235)			(3,069)			(3,235)
Other, net	(544)			(289)			(664)			(294)
Total provision for income taxes	$	25,390		$	19,393		$	26,744		$	20,133
Effective income tax rate	25.8		%	25.1		%	25.7		%	25.1		%