v3.26.1
Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Operating revenues [Abstract]        
Operating revenues $ 243,552 $ 236,194 $ 733,955 $ 730,478
Operating expenses:        
Cost of gas 61,753 64,503 219,902 237,494
Operations and maintenance 80,354 79,065 163,463 162,748
Environmental remediation 2,431 2,296 8,756 8,549
General taxes 12,216 12,076 28,559 27,847
Revenue taxes 8,400 8,283 26,500 27,688
Depreciation 44,212 41,535 88,346 82,035
Other operating expenses 1,029 1,225 2,404 2,552
Total operating expenses 210,395 208,983 537,930 548,913
Income from operations 33,157 27,211 196,025 181,565
Other income (expense), net 1,405 (160) 1,917 (2,676)
Interest expense, net 33,352 30,491 66,704 59,886
Income (loss) before income taxes 1,210 (3,440) 131,238 119,003
Income tax expense (benefit) 610 (940) 33,149 33,587
Net income (loss) 600 (2,500) 98,089 85,416
Other comprehensive income (loss):        
Amortization of non-qualified employee benefit plan liability, net of taxes $33 and $25 for the three months ended and $66 and $50 for the six months ended June 30, 2026 and 2025, respectively 91 174 182 349
Unrealized gain (loss) on interest rate swaps, net of taxes $(4) and $— for the three months ended and $(10) and $47 for the six months ended June 30, 2026 and 2025, respectively 12 (1) 42 (131)
Comprehensive income (loss) $ 703 $ (2,327) $ 98,313 $ 85,634
Average common shares outstanding:        
Basic (in shares) 42,086 40,482 41,898 40,364
Diluted (in shares) 42,178 40,482 42,014 40,429
Earnings (loss) per share of common stock:        
Basic (in dollars per share) $ 0.01 $ (0.06) $ 2.34 $ 2.12
Diluted (in dollars per share) $ 0.01 $ (0.06) $ 2.33 $ 2.11
NW Natural        
Operating revenues [Abstract]        
Operating revenues $ 204,802 $ 200,807 $ 638,698 $ 649,620
Operating expenses:        
Cost of gas 53,326 56,939 193,470 216,375
Operations and maintenance 66,515 63,039 137,045 130,805
Environmental remediation 2,431 2,296 8,756 8,549
General taxes 11,641 11,234 27,678 26,213
Revenue taxes 7,906 7,832 24,943 26,397
Depreciation 39,592 36,564 79,036 72,600
Other operating expenses 452 515 1,145 1,261
Total operating expenses 181,863 178,419 472,073 482,200
Income from operations 22,939 22,388 166,625 167,420
Other income (expense), net 651 (698) 547 (3,447)
Interest expense, net 17,426 15,128 35,104 30,708
Income (loss) before income taxes 6,164 6,562 132,068 133,265
Income tax expense (benefit) 2,231 1,638 34,386 37,302
Net income (loss) 3,933 4,924 97,682 95,963
Other comprehensive income (loss):        
Amortization of non-qualified employee benefit plan liability, net of taxes $33 and $25 for the three months ended and $66 and $50 for the six months ended June 30, 2026 and 2025, respectively 91 174 182 349
Comprehensive income (loss) $ 4,024 $ 5,098 $ 97,864 $ 96,312