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Earnings Per Common Share Attributable To Avista Corporation (Tables) | 3 Months Ended
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Mar. 31, 2017
Earnings Per Share [Abstract] |
Computations Of Earnings Per Share |
| 2017 |  | 2016
Numerator: |  |  |
Net income attributable to Avista Corp. shareholders | $ | 62,116 |  |  | $ | 57,649 |
Denominator: |  |  |
Weighted-average number of common shares outstanding-basic | 64,362 |  |  | 62,605 |
Effect of dilutive securities: |  |  |
Performance and restricted stock awards | 107 |  |  | 302 |
Weighted-average number of common shares outstanding-diluted | 64,469 |  |  | 62,907 |
Earnings per common share attributable to Avista Corp. shareholders: |  |  |
Basic | $ | 0.97 |  |  | $ | 0.92 |
Diluted | $ | 0.96 |  |  | $ | 0.92 |
There were no shares excluded from the calculation because they were antidilutive.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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