Transactions with Major Customers and Affiliates (Tables)

12 Months Ended

Dec. 31, 2023

Transactions with Major Customers and Affiliates [Abstract]

Schedule of revenue by major customers

During the periods presented, more than 10 percent of our operating revenues were generated from each of the following customers:

	Year Ended December 31,
	2023		2022		2021
	(Thousands)
Puget Sound Energy, Inc.	$	126,206	$	130,705	$	131,462
Cascade Natural Gas Corporation	47,046		48,664		49,078
Northwest Natural Gas Company	46,637		48,921		48,901