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v3.19.1

Consolidated Statements Of Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | AOCI Attributable to Parent [Member] | Retained Earnings [Member] | Noncontrolling Interests [Member]
--- | --- | --- | --- | --- | ---
Common Stock, Dividends, Per Share, Cash Paid | $ 0.3725 |  |  |  |
Beginning Balance (in shares) at Dec. 31, 2017 |  | 65,494,333 |  |  |
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Shares issued |  | 174,144 |  |  |
Ending Balance (in shares) at Mar. 31, 2018 |  | 65,668,477 |  |  |
Beginning Balance at Dec. 31, 2017 |  | $ 1,133,448 | $ (8,090) | $ 604,470 |
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Equity compensation expense |  | 1,798 |  |  |
Issuance of common stock, net of issuance costs |  | 232 |  |  |
Payment of minimum tax withholdings for share-based payment awards |  | (3,929) |  |  |
Other comprehensive income | $ 204 |  | 204 |  |
Reclassification of excess income tax benefits |  |  | (1,742) | 1,742 |
Net income attributable to Avista Corporation shareholders | 54,890 |  |  | 54,890 |
Cash dividends paid (common stock) |  |  |  | (24,634) |
Ending Balance at Mar. 31, 2018 | 1,758,571 | $ 1,131,549 | (9,628) | 636,468 |
Beginning Balance Noncontrolling Interest at Dec. 31, 2017 |  |  |  |  | $ 656
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Net income attributable to noncontrolling interests |  |  |  |  | 66
Cash dividends paid to subsidiary noncontrolling interests |  |  |  |  | (540)
Ending Balance Noncontrolling Interest at Mar. 31, 2018 |  |  |  |  | 182
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Total Avista Corporation shareholders’ equity | 1,758,389 |  |  |  |
Total Avista Corporation shareholders’ equity | $ 1,773,220 |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid | $ 0.3875 |  |  |  |
Beginning Balance (in shares) at Dec. 31, 2018 | 65,688,356 | 65,688,356 |  |  |
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Shares issued |  | 61,576 |  |  |
Ending Balance (in shares) at Mar. 31, 2019 | 65,749,932 | 65,749,932 |  |  |
Beginning Balance at Dec. 31, 2018 | $ 1,774,045 | $ 1,136,491 | (7,866) | 644,595 |
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Equity compensation expense |  | 4,452 |  |  |
Issuance of common stock, net of issuance costs |  | 190 |  |  |
Payment of minimum tax withholdings for share-based payment awards |  | (891) |  |  |
Other comprehensive income | 160 |  | 160 |  |
Reclassification of excess income tax benefits |  |  | 0 | 0 |
Net income attributable to Avista Corporation shareholders | 115,794 |  |  | 115,794 |
Cash dividends paid (common stock) |  |  |  | (25,615) |
Ending Balance at Mar. 31, 2019 | 1,868,222 | $ 1,140,242 | $ (7,706) | $ 734,774 |
Beginning Balance Noncontrolling Interest at Dec. 31, 2018 | 825 |  |  |  | 825
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Net income attributable to noncontrolling interests |  |  |  |  | 87
Cash dividends paid to subsidiary noncontrolling interests |  |  |  |  | 0
Ending Balance Noncontrolling Interest at Mar. 31, 2019 | 912 |  |  |  | $ 912
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |  |  |  |  |
Total Avista Corporation shareholders’ equity | $ 1,867,310 |  |  |  |

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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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