Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Operating revenues [Abstract]
Operating revenues	$ 236,194	$ 211,714	$ 730,478	$ 645,184
Operating expenses:
Cost of gas	64,503	72,970	237,494	248,687
Operations and maintenance	79,065	64,950	162,748	138,564
Environmental remediation	2,296	2,329	8,549	8,075
General taxes	12,076	11,853	27,847	27,321
Revenue taxes	8,283	9,211	27,688	27,455
Depreciation	41,535	33,762	82,035	66,860
Other operating expenses	1,225	933	2,552	2,689
Total operating expenses	208,983	196,008	548,913	519,651
Income from operations	27,211	15,706	181,565	125,533
Other income (expense), net	(160)	6	(2,676)	(1,128)
Interest expense, net	30,491	19,311	59,886	39,842
Income (loss) before income taxes	(3,440)	(3,599)	119,003	84,563
Income tax (benefit) expense	(940)	(812)	33,587	23,527
Net income (loss)	(2,500)	(2,787)	85,416	61,036
Other comprehensive income (loss):
Change in employee benefit plan liability, net of taxes	0	115	0	(134)
Amortization of non-qualified employee benefit plan liability, net of taxes	174	152	349	279
Derivative, Gain (Loss) on Derivative, Net	(1)	58	(131)	404
Comprehensive income (loss)	(2,327)	(2,462)	85,634	61,585
Supplemental Income Statement Elements [Abstract]
Change in employee benefit plan liability, tax	0	115	0	49
Amortization of non-qualified employee benefit plan liability, tax	25	55	50	101
Unrealized Loss on Derivative, tax	$ 0	$ 22	$ 47	$ 146
Average common shares outstanding:
Basic (in shares)	40,482	38,260	40,364	38,013
Diluted (in shares)	40,482	38,260	40,429	38,059
Earnings per share of common stock:
Basic (in dollars per share)	$ (0.06)	$ (0.07)	$ 2.12	$ 1.61
Diluted (in dollars per share)	$ (0.06)	$ (0.07)	$ 2.11	$ 1.60
Northwest Natural Gas Company [Member]
Operating revenues [Abstract]
Operating revenues	$ 200,807	$ 200,188	$ 649,620	$ 622,963
Operating expenses:
Cost of gas	56,939	73,026	216,375	248,799
Operations and maintenance	63,039	56,751	130,805	122,260
Environmental remediation	2,296	2,329	8,549	8,075
General taxes	11,234	11,305	26,213	26,396
Revenue taxes	7,832	9,198	26,397	27,393
Depreciation	36,564	31,658	72,600	62,765
Other operating expenses	515	535	1,261	1,258
Total operating expenses	178,419	184,802	482,200	496,946
Income from operations	22,388	15,386	167,420	126,017
Other income (expense), net	(698)	(430)	(3,447)	(1,752)
Interest expense, net	15,128	15,336	30,708	31,414
Income (loss) before income taxes	6,562	(380)	133,265	92,851
Income tax (benefit) expense	1,638	44	37,302	25,717
Net income (loss)	4,924	(424)	95,963	67,134
Other comprehensive income (loss):
Change in employee benefit plan liability, net of taxes	0	115	0	(134)
Amortization of non-qualified employee benefit plan liability, net of taxes	174	152	349	279
Comprehensive income (loss)	5,098	(157)	96,312	67,279
Supplemental Income Statement Elements [Abstract]
Change in employee benefit plan liability, tax	0	115	0	49
Amortization of non-qualified employee benefit plan liability, tax	$ 25	$ 55	$ 50	$ 101

Northwest Natural Holding Co 10-Q