Income Tax (Tables)

6 Months Ended

Jun. 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 June 30,
	NW Holdings						NW Natural
In thousands	2020			2019			2020			2019
Income tax at statutory rate (federal)	$	(1,429	)	$	480		$	(1,287	)	$	765
State	(333		)	214			(281		)	290
Increase (decrease):
Differences required to be flowed-through by regulatory commissions	173			(37		)	173			(37		)
Other, net	(83		)	(32		)	(24		)	(33		)
Total provision for income taxes on continuing operations	$	(1,672	)	$	625		$	(1,419	)	$	985
Effective income tax rate for continuing operations	24.6		%	23.4		%	23.1		%	24.4		%

	Six Months Ended June 30,
	NW Holdings						NW Natural
In thousands	2020			2019			2020			2019
Income tax at statutory rate (federal)	$	11,676		$	11,502		$	12,068		$	11,924
State	3,344			3,505			3,456			3,616
Increase (decrease):
Differences required to be flowed-through by regulatory commissions	(2,352		)	(5,297		)	(2,352		)	(5,297		)
Other, net	(213		)	(410		)	(173		)	(410		)
Total provision for income taxes on continuing operations	$	12,455		$	9,300		$	12,999		$	9,833
Effective income tax rate for continuing operations	22.4		%	17.0		%	22.6		%	17.3		%