Investments

6 Months Ended

Jun. 30, 2023

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
	June 30,				December 31,		June 30,				December 31,
In thousands	2023		2022		2022		2023		2022		2022
Investments in life insurance policies	$	46,772	$	48,735	$	49,358	$	46,772	$	48,735	$	49,358
Investments in gas reserves, non-current	21,488		24,695		22,970		21,488		24,695		22,970
Investment in unconsolidated affiliates	36,070		22,597		23,376		19,588		8,056		7,782
Total other investments	$	104,330	$	96,027	$	95,704	$	87,848	$	81,486	$	80,110