Investments

3 Months Ended

Mar. 31, 2022

Investments [Abstract]

Investment [Table Text Block]

Investments include gas reserves, financial investments in life insurance policies, and equity method investments. The following table summarizes other investments:

	NW Holdings						NW Natural
	March 31,				December 31,		March 31,				December 31,
In thousands	2022		2021		2021		2022		2021		2021
Investments in life insurance policies	$	48,486	$	47,411	$	48,178	$	48,486	$	47,411	$	48,178
Investments in gas reserves, non-current	25,364		31,600		26,608		25,364		31,600		26,608
Investment in unconsolidated affiliates	22,416		23		14,492		7,947		—		—
Total other investments	$	96,266	$	79,034	$	89,278	$	81,797	$	79,011	$	74,786