XML 72 R59.htm IDEA: XBRL DOCUMENT v3.23.1
Business Segment Information: Information Relating to Segments Statement of Income (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Segment Reporting Information    
Revenue from contracts with customers $ 912,055 $ 821,769
Revenue 921,159 823,570
Fuel, purchased power and cost of natural gas sold 526,267 436,926
Depreciation, depletion and amortization 61,643 60,463
Operating income (loss) 174,883 173,353
Interest expense, net (43,504) (38,545)
Other income, net 674 704
Income tax (expense) (14,673) (14,488)
Net income 117,380 121,024
Net income attributable to non-controlling interest (3,296) (3,498)
Net income available for common stock 114,084 117,526
Electric Utilities    
Segment Reporting Information    
Revenue from contracts with customers 217,829 205,668
Revenue 218,709 206,538
Operating income (loss) 61,060 50,746
Gas Utilities    
Segment Reporting Information    
Revenue from contracts with customers 698,692 620,349
Revenue 706,916 621,392
Operating income (loss) 114,625 123,540
Corporate, Non-Segment    
Segment Reporting Information    
Operating income (loss) (802) (933)
Intercompany Eliminations    
Segment Reporting Information    
Revenue from contracts with customers (4,466) (4,248)
Revenue (4,466) (4,360)
Other revenues    
Segment Reporting Information    
Revenue 9,104 1,801
Other revenues | Electric Utilities    
Segment Reporting Information    
Revenue 880 870
Other revenues | Gas Utilities    
Segment Reporting Information    
Revenue 8,224 1,043
Other revenues | Intercompany Eliminations    
Segment Reporting Information    
Revenue 0 (112)
External Customers    
Segment Reporting Information    
Revenue from contracts with customers 912,055 821,769
External Customers | Electric Utilities    
Segment Reporting Information    
Revenue from contracts with customers 215,012 202,739
External Customers | Gas Utilities    
Segment Reporting Information    
Revenue from contracts with customers 697,043 619,030
External Customers | Other revenues    
Segment Reporting Information    
Revenue 9,104 1,801
External Customers | Other revenues | Electric Utilities    
Segment Reporting Information    
Revenue 881 870
External Customers | Other revenues | Gas Utilities    
Segment Reporting Information    
Revenue 8,223 931
Intercompany Customers    
Segment Reporting Information    
Revenue from contracts with customers 0 0
Intercompany Customers | Electric Utilities    
Segment Reporting Information    
Revenue from contracts with customers 2,816 2,929
Intercompany Customers | Gas Utilities    
Segment Reporting Information    
Revenue from contracts with customers 1,650 1,319
Intercompany Customers | Intercompany Eliminations    
Segment Reporting Information    
Revenue from contracts with customers (4,466) (4,248)
Intercompany Customers | Other revenues    
Segment Reporting Information    
Revenue 0 0
Intercompany Customers | Other revenues | Electric Utilities    
Segment Reporting Information    
Revenue 0 0
Intercompany Customers | Other revenues | Gas Utilities    
Segment Reporting Information    
Revenue 0 112
Intercompany Customers | Other revenues | Intercompany Eliminations    
Segment Reporting Information    
Revenue $ 0 $ (112)