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v3.10.0.1

Consolidated Statements Of Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | AOCI Attributable to Parent [Member] | Retained Earnings [Member] | Noncontrolling Interests [Member]
--- | --- | --- | --- | --- | ---
Beginning Balance (in shares) at Dec. 31, 2016 |  | 64,187,934 |  |  |
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Shares issued |  | 226,638 |  |  |
Ending Balance (in shares) at Sep. 30, 2017 |  | 64,414,572 |  |  |
Beginning Balance at Dec. 31, 2016 |  | $ 1,075,281 | $ (7,568) | $ 581,014 |
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Equity compensation expense |  | 5,055 |  |  |
Issuance of common stock, net of issuance costs |  | 1,490 |  |  |
Payment of minimum tax withholdings for share-based payment awards |  | (3,420) |  |  |
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests |  | (1,191) |  |  | $ 891
Other comprehensive income | $ 548 |  | 548 |  |
Reclassification of excess income tax benefits |  |  | 0 | 0 |
Net income attributable to Avista Corporation shareholders | 88,338 |  |  | 88,338 |
Cash dividends paid (common stock) |  |  |  | (69,220) |
Ending Balance at Sep. 30, 2017 | 1,670,946 | $ 1,077,215 | (7,020) | 600,132 |
Beginning Balance Noncontrolling Interest at Dec. 31, 2016 |  |  |  |  | (251)
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Net income (loss) attributable to noncontrolling interests |  |  |  |  | (21)
Ending Balance Noncontrolling Interest at Sep. 30, 2017 |  |  |  |  | 619
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Total Avista Corporation shareholders’ equity | 1,670,327 |  |  |  |
Total Avista Corporation shareholders’ equity | $ 1,729,828 |  |  |  |
Beginning Balance (in shares) at Dec. 31, 2017 | 65,494,333 | 65,494,333 |  |  |
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Shares issued |  | 193,667 |  |  |
Ending Balance (in shares) at Sep. 30, 2018 | 65,688,000 | 65,688,000 |  |  |
Beginning Balance at Dec. 31, 2017 | $ 1,730,484 | $ 1,133,448 | (8,090) | 604,470 |
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Equity compensation expense |  | 4,800 |  |  |
Issuance of common stock, net of issuance costs |  | 1,224 |  |  |
Payment of minimum tax withholdings for share-based payment awards |  | (3,929) |  |  |
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests |  | 0 |  |  | 0
Other comprehensive income | 612 |  | 612 |  |
Reclassification of excess income tax benefits |  |  | (1,742) | 1,742 |
Net income attributable to Avista Corporation shareholders | 90,586 |  |  | 90,586 |
Cash dividends paid (common stock) |  |  |  | (73,569) |
Ending Balance at Sep. 30, 2018 | 1,750,351 | $ 1,135,543 | $ (9,220) | $ 623,229 |
Beginning Balance Noncontrolling Interest at Dec. 31, 2017 | 656 |  |  |  | 656
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Net income (loss) attributable to noncontrolling interests |  |  |  |  | 143
Ending Balance Noncontrolling Interest at Sep. 30, 2018 | 799 |  |  |  | $ 799
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Total Avista Corporation shareholders’ equity | $ 1,749,552 |  |  |  |

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- Definition Reclassification from AOCI to Retained Earnings -ASU 2018-02 was issued February 2018, which allows stranded tax effects associated with the enactment of the Tax Cuts and Jobs Act to be reclassified from AOCI to Retained Earnings. + References No definition available. + Details
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