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Information by Business Segments | 12 Months Ended
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Dec. 31, 2020
Segment Reporting [Abstract] |
Information by Business Segments | NOTE 24. INFORMATION BY BUSINESS SEGMENTS The business segment presentation reflects the basis used by the Company's management to analyze performance and determine the allocation of resources. The Company's management evaluates performance based on income (loss) from operations before income taxes as well as net income (loss) attributable to Avista Corp. shareholders. The accounting policies of the segments are the same as those described in the summary of significant accounting policies. Avista Utilities' business is managed based on the total regulated utility operation; therefore, it is considered one segment. AEL&P is a separate reportable business segment as it has separate financial reports that are reviewed in detail by the Chief Operating Decision Maker and its operations and risks are sufficiently different from Avista Utilities and the other businesses at AERC that it cannot be aggregated with any other operating segments. The Other category, which is not a reportable segment, includes other investments and operations of various subsidiaries, as well as certain other operations of Avista Capital. The following table presents information for each of the Company’s business segments (dollars in thousands):
|  | Avista Utilities |  |  | Alaska Electric Light and Power Company |  |  | Total Utility |  |  | Other |  |  | Intersegment Eliminations (1) |  |  | Total |
For the year ended December 31, 2020: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 1,277,468 |  |  | $ | 42,809 |  |  | $ | 1,320,277 |  |  | $ | 1,614 |  |  | $ | — |  |  | $ | 1,321,891 |
Resource costs |  |  | 396,543 |  |  |  | 1,966 |  |  |  | 398,509 |  |  |  | — |  |  |  | — |  |  |  | 398,509 |
Other operating expenses |  |  | 341,709 |  |  |  | 12,905 |  |  |  | 354,614 |  |  |  | 5,344 |  |  |  | — |  |  |  | 359,958 |
Depreciation and amortization |  |  | 213,701 |  |  |  | 9,806 |  |  |  | 223,507 |  |  |  | 716 |  |  |  | — |  |  |  | 224,223 |
Income (loss) from operations |  |  | 220,058 |  |  |  | 17,088 |  |  |  | 237,146 |  |  |  | (4,446 | ) |  |  | — |  |  |  | 232,700 |
Interest expense (2) |  |  | 98,451 |  |  |  | 6,272 |  |  |  | 104,723 |  |  |  | 524 |  |  |  | (186 | ) |  |  | 105,061 |
Income taxes |  |  | 4,921 |  |  |  | 3,011 |  |  |  | 7,932 |  |  |  | (881 | ) |  |  | — |  |  |  | 7,051 |
Net income (loss) from continuing operations attributable to Avista Corp. shareholders |  |  | 124,810 |  |  |  | 8,095 |  |  |  | 132,905 |  |  |  | (3,417 | ) |  |  | — |  |  |  | 129,488 |
Capital expenditures (3) |  |  | 397,292 |  |  |  | 7,014 |  |  |  | 404,306 |  |  |  | 1,368 |  |  |  | — |  |  |  | 405,674 |
For the year ended December 31, 2019: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 1,295,873 |  |  | $ | 37,265 |  |  | $ | 1,333,138 |  |  | $ | 12,484 |  |  | $ | — |  |  | $ | 1,345,622 |
Resource costs |  |  | 442,471 |  |  |  | (2,654 | ) |  |  | 439,817 |  |  |  | — |  |  |  | — |  |  |  | 439,817 |
Other operating expenses (4) |  |  | 352,170 |  |  |  | 12,717 |  |  |  | 364,887 |  |  |  | 18,883 |  |  |  | — |  |  |  | 383,770 |
Depreciation and amortization |  |  | 195,697 |  |  |  | 9,668 |  |  |  | 205,365 |  |  |  | 629 |  |  |  | — |  |  |  | 205,994 |
Income (loss) from operations |  |  | 200,994 |  |  |  | 16,423 |  |  |  | 217,417 |  |  |  | (7,028 | ) |  |  | — |  |  |  | 210,389 |
Interest expense (2) |  |  | 97,866 |  |  |  | 6,385 |  |  |  | 104,251 |  |  |  | 1,032 |  |  |  | (929 | ) |  |  | 104,354 |
Income taxes |  |  | 28,363 |  |  |  | 2,816 |  |  |  | 31,179 |  |  |  | 195 |  |  |  | — |  |  |  | 31,374 |
Net income from continuing operations attributable to Avista Corp. shareholders |  |  | 183,977 |  |  |  | 7,458 |  |  |  | 191,435 |  |  |  | 5,544 |  |  |  | — |  |  |  | 196,979 |
Capital expenditures (3) |  |  | 434,077 |  |  |  | 8,433 |  |  |  | 442,510 |  |  |  | 835 |  |  |  | — |  |  |  | 443,345 |
For the year ended December 31, 2018: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 1,325,966 |  |  | $ | 43,599 |  |  | $ | 1,369,565 |  |  | $ | 27,328 |  |  | $ | — |  |  | $ | 1,396,893 |
Resource costs |  |  | 485,231 |  |  |  | 9,505 |  |  |  | 494,736 |  |  |  | — |  |  |  | — |  |  |  | 494,736 |
Other operating expenses (4) |  |  | 309,501 |  |  |  | 12,491 |  |  |  | 321,992 |  |  |  | 28,081 |  |  |  | — |  |  |  | 350,073 |
Depreciation and amortization |  |  | 177,006 |  |  |  | 5,871 |  |  |  | 182,877 |  |  |  | 799 |  |  |  | — |  |  |  | 183,676 |
Income (loss) from operations |  |  | 248,000 |  |  |  | 14,665 |  |  |  | 262,665 |  |  |  | (1,552 | ) |  |  | — |  |  |  | 261,113 |
Interest expense (2) |  |  | 96,738 |  |  |  | 3,584 |  |  |  | 100,322 |  |  |  | 1,694 |  |  |  | (1,080 | ) |  |  | 100,936 |
Income taxes |  |  | 25,259 |  |  |  | 3,094 |  |  |  | 28,353 |  |  |  | (2,293 | ) |  |  | — |  |  |  | 26,060 |
Net income (loss) from continuing operations attributable to Avista Corp. shareholders |  |  | 134,874 |  |  |  | 8,292 |  |  |  | 143,166 |  |  |  | (6,737 | ) |  |  | — |  |  |  | 136,429 |
Capital expenditures (3) |  |  | 418,741 |  |  |  | 5,609 |  |  |  | 424,350 |  |  |  | 891 |  |  |  | — |  |  |  | 425,241 |
Total Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
As of December 31, 2020 |  | $ | 6,035,340 |  |  | $ | 268,971 |  |  | $ | 6,304,311 |  |  | $ | 109,658 |  |  | $ | (11,872 | ) |  | $ | 6,402,097 |
As of December 31, 2019 |  | $ | 5,713,268 |  |  | $ | 271,393 |  |  | $ | 5,984,661 |  |  | $ | 113,390 |  |  | $ | (15,595 | ) |  | $ | 6,082,456 |
As of December 31, 2018 |  | $ | 5,458,104 |  |  | $ | 272,950 |  |  | $ | 5,731,054 |  |  | $ | 87,050 |  |  | $ | (35,528 | ) |  | $ | 5,782,576 |
(1) | Intersegment eliminations reported as interest expense represent intercompany interest. Intersegment eliminations reported as assets represent intersegment accounts receivable.
(2) | Including interest expense to affiliated trusts.
(3) | The capital expenditures for the other businesses are included in other investing activities on the Consolidated Statements of Cash Flows.
(4) | Other operating expenses for Avista Utilities for 2019 and 2018 include merger transaction costs which are separately disclosed on the Consolidated Statements of Income.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8981-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8844-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8657-108599 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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