v3.26.1
STATEMENTS OF INCOME - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Regulated operating revenue $ 831,711 $ 935,190
Cost of natural gas 393,576 512,462
Operating expenses    
Operations and maintenance 146,947 135,295
Depreciation and amortization 76,785 81,704
General taxes 24,811 25,230
Total operating expenses 248,543 242,229
Operating income 189,592 180,499
Other nonoperating income (expense) (2,097) 518
Interest expense, net (32,358) (35,697)
Income before income taxes 155,137 145,320
Income taxes (26,464) (25,901)
Net income $ 128,673 $ 119,419
Earnings per share    
Basic $ 2.05 $ 1.99
Diluted $ 2.04 $ 1.98
Weighted Average Number of Shares Outstanding, Basic [Abstract]    
Basic 62,913 60,077
Weighted Average Number of Shares Outstanding, Diluted [Abstract]    
Diluted 63,204 60,266
Common Stock, Dividends, Per Share, Declared $ 0.68 $ 0.67