Debt

9 Months Ended

Sep. 30, 2022

Debt Disclosure [Abstract]

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments

The following table provides an estimate of the fair value of long-term debt, including current maturities of long-term debt, using market prices in effect on the valuation date:

	September 30,				December 31,
In thousands	2022		2021		2021
NW Natural:
Gross long-term debt	$	1,134,700	$	864,700	$	994,700
Unamortized debt issuance costs	(8,229)		(6,940)		(8,205)
Carrying amount	$	1,126,471	$	857,760	$	986,495
Estimated fair value(1)	$	927,372	$	978,613	$	1,110,741
NW Holdings:
Gross long-term debt	$	1,345,968	$	923,355	$	1,053,241
Unamortized debt issuance costs	(8,348)		(7,051)		(8,309)
Carrying amount	$	1,337,620	$	916,304	$	1,044,932
Estimated fair value(1)	$	1,133,087	$	1,042,705	$	1,174,500

(1) Estimated fair value does not include unamortized debt issuance costs.