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Segmented information (Tables) | 12 Months Ended
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Dec. 31, 2020
Segment Reporting [Abstract] |
Results of Operations and Assets for Segments |
| Year ended December 31, 2020
| Regulated Services Group |  | Renewable Energy Group |  | Corporate |  | Total
Revenue (1)(2) | $ | 1,405,136 |  |  | $ | 270,398 |  |  | $ | 1,524 |  |  | $ | 1,677,058 |
Fuel, power and water purchased | 384,363 |  |  | 16,645 |  |  | — |  |  | 401,008 |
Net revenue | 1,020,773 |  |  | 253,753 |  |  | 1,524 |  |  | 1,276,050 |
Operating expenses | 445,459 |  |  | 74,981 |  |  | 12 |  |  | 520,452 |
Administrative expenses | 34,141 |  |  | 24,719 |  |  | 630 |  |  | 59,490 |
Depreciation and amortization | 219,089 |  |  | 92,890 |  |  | 2,144 |  |  | 314,123 |
Gain on foreign exchange | — |  |  | — |  |  | (2,108) |  |  | (2,108) |
Operating income | 322,084 |  |  | 61,163 |  |  | 846 |  |  | 384,093 |
Interest expense | (99,161) |  |  | (52,656) |  |  | (30,117) |  |  | (181,934) |
Income from long-term investments | 7,753 |  |  | 96,652 |  |  | 560,266 |  |  | 664,671 |
Other | (40,128) |  |  | (6,537) |  |  | (27,754) |  |  | (74,419) |
Earnings before income taxes | $ | 190,548 |  |  | $ | 98,622 |  |  | $ | 503,241 |  |  | $ | 792,411 |
Property, plant and equipment | $ | 5,757,532 |  |  | $ | 2,451,706 |  |  | $ | 32,600 |  |  | $ | 8,241,838 |
Investments carried at fair value | — |  |  | 1,837,429 |  |  | — |  |  | 1,837,429 |
Equity-method investees | 74,673 |  |  | 111,779 |  |  | — |  |  | 186,452 |
Total assets | 8,528,172 |  |  | 4,589,521 |  |  | 106,213 |  |  | 13,223,906 |
Capital expenditures | $ | 690,792 |  |  | $ | 80,746 |  |  | $ | 14,492 |  |  | $ | 786,030 |
(1) Renewable Energy Group revenue includes $28,586 related to net hedging gains from energy derivative contracts and availability credits for the year ended December 31, 2020 that do not represent revenue recognized from contracts with customers. (2) Regulated Services Group revenue includes $24,928 related to alternative revenue programs for the year ended December 31, 2020 that do not represent revenue recognized from contracts with customers. 21. Segmented information (continued)
| Year ended December 31, 2019
| Regulated Services Group |  | Renewable Energy Group |  | Corporate |  | Total
Revenue (1)(2) | $ | 1,368,411 |  |  | $ | 256,510 |  |  | $ | 1,471 |  |  | $ | 1,626,392 |
Fuel and power purchased | 426,046 |  |  | 17,258 |  |  | — |  |  | 443,304 |
Net revenue | 942,365 |  |  | 239,252 |  |  | 1,471 |  |  | 1,183,088 |
Operating expenses | 397,092 |  |  | 74,676 |  |  | 221 |  |  | 471,989 |
Administrative expenses | 36,667 |  |  | 19,366 |  |  | 769 |  |  | 56,802 |
Depreciation and amortization | 194,766 |  |  | 88,557 |  |  | 981 |  |  | 284,304 |
Loss on foreign exchange | — |  |  | — |  |  | 3,146 |  |  | 3,146 |
Operating income | 313,840 |  |  | 56,653 |  |  | (3,646) |  |  | 366,847 |
Interest expense | (101,518) |  |  | (61,039) |  |  | (18,931) |  |  | (181,488) |
Income from long-term investments | 9,334 |  |  | 104,025 |  |  | 284,262 |  |  | 397,621 |
Other | (32,297) |  |  | 15,951 |  |  | (11,567) |  |  | (27,913) |
Earnings before income taxes | $ | 189,359 |  |  | $ | 115,590 |  |  | $ | 250,118 |  |  | $ | 555,067 |
Property, plant and equipment | $ | 4,763,689 |  |  | $ | 2,444,382 |  |  | $ | 32,909 |  |  | $ | 7,240,980 |
Investments carried at fair value | 27,072 |  |  | 1,267,075 |  |  | — |  |  | 1,294,147 |
Equity-method investees | 29,827 |  |  | 52,284 |  |  | — |  |  | 82,111 |
Total assets | 6,825,379 |  |  | 4,014,067 |  |  | 81,340 |  |  | 10,920,786 |
Capital expenditures | $ | 478,936 |  |  | $ | 102,396 |  |  | $ | — |  |  | $ | 581,332 |
(1) Renewable Energy Group revenue includes $22,282 related to net hedging gains from energy derivative contracts for the year ended December 31, 2019 that do not represent revenue recognized from contracts with customers. (2) Regulated Services Group revenue includes $(4,405) related to alternative revenue programs for the year ended December 31, 2019 that do not represent revenue recognized from contracts with customers.
Information on Operations by Geographic Area | Information on operations by geographic area is as follows:
|  |  |  |  | 2020 |  | 2019
Revenue |  |  |  |  |  |  |
United States |  |  |  |  | $ | 1,475,087 |  |  | $ | 1,537,695 |
Canada |  |  |  |  | 153,569 |  |  | 88,697 |
Other regions |  |  |  |  | 48,402 |  |  | — |
|  |  |  |  | $ | 1,677,058 |  |  | $ | 1,626,392 |
Property, plant and equipment |  |  |  |  |  |  |
United States |  |  |  |  | $ | 6,666,015 |  |  | $ | 6,488,964 |
Canada |  |  |  |  | 884,195 |  |  | 752,016 |
Other regions |  |  |  |  | 691,628 |  |  | — |
|  |  |  |  | $ | 8,241,838 |  |  | $ | 7,240,980 |
Intangible assets |  |  |  |  |  |  |
United States |  |  |  |  | $ | 24,825 |  |  | $ | 23,821 |
Canada |  |  |  |  | 23,123 |  |  | 23,795 |
Other regions |  |  |  |  | 66,965 |  |  | — |
|  |  |  |  | $ | 114,913 |  |  | $ | 47,616 |

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