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Information By Business Segments | 3 Months Ended
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Mar. 31, 2017
Segment Reporting [Abstract] |
Information by Business Segments | 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 three months ended March 31, 2017: |  |  |  |  |  |  |  |  |  |
Operating revenues | $ | 415,381 |  |  | $ | 15,156 |  |  | $ | 430,537 |  |  | $ | 5,933 |  |  | $ | — |  |  | $ | 436,470 |
Resource costs | 162,613 |  |  | 2,973 |  |  | 165,586 |  |  | — |  |  | — |  |  | 165,586 |
Other operating expenses | 71,712 |  |  | 2,772 |  |  | 74,484 |  |  | 6,179 |  |  | — |  |  | 80,663 |
Depreciation and amortization | 40,538 |  |  | 1,447 |  |  | 41,985 |  |  | 188 |  |  | — |  |  | 42,173 |
Income (loss) from operations | 108,635 |  |  | 7,185 |  |  | 115,820 |  |  | (434 | ) |  | — |  |  | 115,386 |
Interest expense (2) | 22,683 |  |  | 894 |  |  | 23,577 |  |  | 167 |  |  | (14 | ) |  | 23,730 |
Income taxes | 31,017 |  |  | 2,463 |  |  | 33,480 |  |  | (136 | ) |  | — |  |  | 33,344 |
Net income (loss) attributable to Avista Corp. shareholders | 58,439 |  |  | 3,853 |  |  | 62,292 |  |  | (176 | ) |  | — |  |  | 62,116 |
Capital expenditures (3) | 85,403 |  |  | 1,360 |  |  | 86,763 |  |  | 35 |  |  | — |  |  | 86,798 |
| Avista Utilities |  | Alaska Electric Light and Power Company |  | Total Utility |  | Other |  | Intersegment Eliminations (1) |  | Total
For the three months ended March 31, 2016: |  |  |  |  |  |  |  |  |  |
Operating revenues | $ | 400,147 |  |  | $ | 12,646 |  |  | $ | 412,793 |  |  | $ | 5,380 |  |  | $ | — |  |  | $ | 418,173 |
Resource costs | 159,078 |  |  | 2,641 |  |  | 161,719 |  |  | — |  |  | — |  |  | 161,719 |
Other operating expenses | 73,256 |  |  | 2,523 |  |  | 75,779 |  |  | 5,825 |  |  | — |  |  | 81,604 |
Depreciation and amortization | 37,866 |  |  | 1,326 |  |  | 39,192 |  |  | 188 |  |  | — |  |  | 39,380 |
Income (loss) from operations | 101,245 |  |  | 5,473 |  |  | 106,718 |  |  | (633 | ) |  | — |  |  | 106,085 |
Interest expense (2) | 20,418 |  |  | 895 |  |  | 21,313 |  |  | 161 |  |  | (63 | ) |  | 21,411 |
Income taxes | 28,672 |  |  | 1,895 |  |  | 30,567 |  |  | (222 | ) |  | — |  |  | 30,345 |
Net income (loss) attributable to Avista Corp. shareholders | 54,987 |  |  | 2,961 |  |  | 57,948 |  |  | (299 | ) |  | — |  |  | 57,649 |
Capital expenditures (3) | 84,435 |  |  | 4,443 |  |  | 88,878 |  |  | 119 |  |  | — |  |  | 88,997 |
Total Assets: |  |  |  |  |  |  |  |  |  |  |
As of March 31, 2017: | $ | 5,003,014 |  |  | $ | 276,495 |  |  | $ | 5,279,509 |  |  | $ | 60,850 |  |  | $ | — |  |  | $ | 5,340,359 |
As of December 31, 2016: | $ | 4,975,555 |  |  | $ | 273,770 |  |  | $ | 5,249,325 |  |  | $ | 60,430 |  |  | $ | — |  |  | $ | 5,309,755 |
(1) | Intersegment eliminations reported as operating revenues and resource costs represent intercompany purchases and sales of electric capacity and energy. Intersegment eliminations reported as interest expense and net income (loss) attributable to Avista Corp. shareholders represent intercompany interest.
(2) | Including interest expense to affiliated trusts.
(3) | The capital expenditures for the other businesses are included as other capital expenditures on the Condensed Consolidated Statements of Cash Flows.

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8981-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8971-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8595-108599 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8380-108599 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8844-108599 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8984-108599 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9031-108599 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9054-108599 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8538-108599 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8864-108599 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8924-108599 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 + Details
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