Transactions with Major Customers and Affiliates (Tables)

12 Months Ended

Dec. 31, 2021

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,
	2021		2020		2019
	(Thousands)
Puget Sound Energy, Inc.	$	131,462	$	132,747	$	121,792
Cascade Natural Gas Corporation	49,078		47,493		46,969
Northwest Natural Gas Company	48,901		48,893		48,891