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Business Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2022
Segment Reporting Information, Additional Information [Abstract] |
Segment information included in Consolidated Balance Sheets | Segment information was as follows (in thousands):
Total Assets (net of intercompany eliminations) as of December 31, |  | 2022 |  |  | 2021 |
Electric Utilities |  | $ | 3,929,721 |  |  | $ | 3,796,662 |
Gas Utilities |  |  | 5,578,282 |  |  |  | 5,246,370 |
Corporate and Other |  |  | 110,227 |  |  |  | 88,864 |
Total assets |  | $ | 9,618,230 |  |  | $ | 9,131,896 |
Capital Expenditures (a) for the years ended December 31, |  | 2022 |  |  | 2021 |  |  | 2020 |
Electric Utilities |  | $ | 243,133 |  |  | $ | 285,770 |  |  | $ | 288,683 |
Gas Utilities |  |  | 349,438 |  |  |  | 383,320 |  |  |  | 449,209 |
Corporate and Other |  |  | 5,097 |  |  |  | 10,500 |  |  |  | 17,500 |
Total capital expenditures |  | $ | 597,668 |  |  | $ | 679,590 |  |  | $ | 755,392 |
(a) Includes accruals for property, plant and equipment as disclosed in the Supplemental Cash Flow Information to the Consolidated Statement of Cash Flows.
Segment information included in Consolidated Statements of Income |
|  | Consolidating Income Statement |
Year ended December 31, 2022 |  | Electric Utilities |  |  | Gas Utilities |  |  | Corporate |  |  | Inter-Company Eliminations |  |  | Total |
Revenue - |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contracts with customers |  | $ | 882,899 |  |  | $ | 1,659,957 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,542,856 |
Other revenues |  |  | 5,548 |  |  |  | 3,412 |  |  |  | — |  |  |  | — |  |  |  | 8,960 |
|  |  | 888,447 |  |  |  | 1,663,369 |  |  |  | — |  |  |  | — |  |  |  | 2,551,816 |
Inter-company operating revenue - |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contracts with customers |  |  | 11,715 |  |  |  | 5,292 |  |  |  | 538 |  |  |  | (17,545 | ) |  |  | — |
Other revenues |  |  | — |  |  |  | 429 |  |  |  | 368,201 |  |  |  | (368,630 | ) |  |  | — |
|  |  | 11,715 |  |  |  | 5,721 |  |  |  | 368,739 |  |  |  | (386,175 | ) |  |  | — |
Total revenue |  |  | 900,162 |  |  |  | 1,669,090 |  |  |  | 368,739 |  |  |  | (386,175 | ) |  |  | 2,551,816 |
Fuel, purchased power and cost of natural gas sold |  |  | 266,284 |  |  |  | 965,108 |  |  |  | (11 | ) |  |  | (831 | ) |  |  | 1,230,550 |
Operations and maintenance, including taxes |  |  | 283,654 |  |  |  | 345,143 |  |  |  | 309,773 |  |  |  | (323,457 | ) |  |  | 615,113 |
Depreciation, depletion and amortization |  |  | 135,966 |  |  |  | 114,679 |  |  |  | 26,964 |  |  |  | (26,700 | ) |  |  | 250,909 |
Operating income (loss) |  | $ | 214,258 |  |  | $ | 244,160 |  |  | $ | 32,013 |  |  | $ | (35,187 | ) |  | $ | 455,244 |
Interest expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (160,989 | )
Impairment of investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | — |
Other income (expense), net |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,708 |
Income tax benefit (expense) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (25,205 | )
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 270,758 |
Net income attributable to non-controlling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (12,371 | )
Net income available for common stock |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 258,387 |
|  | Consolidating Income Statement |
Year ended December 31, 2021 |  | Electric Utilities |  |  | Gas Utilities |  |  | Corporate |  |  | Inter-Company Eliminations |  |  | Total |
Revenue - |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contracts with customers |  | $ | 825,404 |  |  | $ | 1,105,430 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,930,834 |
Other revenues |  |  | 5,336 |  |  |  | 12,932 |  |  |  | — |  |  |  | — |  |  |  | 18,268 |
|  |  | 830,740 |  |  |  | 1,118,362 |  |  |  | — |  |  |  | — |  |  |  | 1,949,102 |
Inter-company operating revenue - |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contracts with customers |  |  | 11,518 |  |  |  | 6,110 |  |  |  | 196 |  |  |  | (17,824 | ) |  |  | — |
Other revenues |  |  | — |  |  |  | 393 |  |  |  | 356,151 |  |  |  | (356,544 | ) |  |  | — |
|  |  | 11,518 |  |  |  | 6,503 |  |  |  | 356,347 |  |  |  | (374,368 | ) |  |  | — |
Total revenue |  |  | 842,258 |  |  |  | 1,124,865 |  |  |  | 356,347 |  |  |  | (374,368 | ) |  |  | 1,949,102 |
Fuel, purchased power and cost of natural gas sold |  |  | 248,018 |  |  |  | 494,738 |  |  |  | 96 |  |  |  | (918 | ) |  |  | 741,934 |
Operations and maintenance, including taxes |  |  | 260,036 |  |  |  | 314,810 |  |  |  | 293,265 |  |  |  | (306,325 | ) |  |  | 561,786 |
Depreciation, depletion and amortization |  |  | 131,528 |  |  |  | 104,160 |  |  |  | 26,838 |  |  |  | (26,573 | ) |  |  | 235,953 |
Operating income (loss) |  | $ | 202,676 |  |  | $ | 211,157 |  |  | $ | 36,148 |  |  | $ | (40,552 | ) |  | $ | 409,429 |
Interest expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (152,404 | )
Impairment of investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | — |
Other income (expense), net |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,404 |
Income tax benefit (expense) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (7,169 | )
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 251,260 |
Net income attributable to non-controlling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (14,516 | )
Net income available for common stock |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 236,744 |
|  | Consolidating Income Statement |
Year ended December 31, 2020 |  | Electric Utilities |  |  | Gas Utilities |  |  | Corporate |  |  | Inter-Company Eliminations |  |  | Total |
Revenue - |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contracts with customers |  | $ | 721,108 |  |  | $ | 959,696 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,680,804 |
Other revenues |  |  | 6,175 |  |  |  | 9,962 |  |  |  | — |  |  |  | — |  |  |  | 16,137 |
|  |  | 727,283 |  |  |  | 969,658 |  |  |  | — |  |  |  | — |  |  |  | 1,696,941 |
Inter-company operating revenue - |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contracts with customers |  |  | 11,574 |  |  |  | 4,724 |  |  |  | 167 |  |  |  | (16,465 | ) |  |  | — |
Other revenues |  |  | — |  |  |  | 288 |  |  |  | 352,976 |  |  |  | (353,264 | ) |  |  | — |
|  |  | 11,574 |  |  |  | 5,012 |  |  |  | 353,143 |  |  |  | (369,729 | ) |  |  | — |
Total revenue |  |  | 738,857 |  |  |  | 974,670 |  |  |  | 353,143 |  |  |  | (369,729 | ) |  |  | 1,696,941 |
Fuel, purchased power and cost of natural gas sold |  |  | 138,572 |  |  |  | 354,645 |  |  |  | 83 |  |  |  | (896 | ) |  |  | 492,404 |
Operations and maintenance, including taxes |  |  | 265,679 |  |  |  | 303,577 |  |  |  | 284,501 |  |  |  | (301,980 | ) |  |  | 551,777 |
Depreciation, depletion and amortization |  |  | 123,632 |  |  |  | 100,559 |  |  |  | 25,150 |  |  |  | (24,884 | ) |  |  | 224,457 |
Operating income (loss) |  | $ | 210,974 |  |  | $ | 215,889 |  |  | $ | 43,409 |  |  | $ | (41,969 | ) |  | $ | 428,303 |
Interest expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (143,470 | )
Impairment of investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (6,859 | )
Other income (expense), net |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,293 | )
Income tax benefit (expense) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (32,918 | )
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 242,763 |
Net income attributable to non-controlling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (15,155 | )
Net income available for common stock |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 227,608 |

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