SPOKANE, Wash., Feb. 24, 2021 (GLOBE NEWSWIRE) -- Avista Corp. ( NYSE: AVA ) today reported net income attributable to Avista Corp. shareholders of $129.5 million, or $1.90 per diluted share for the year ended Dec. 31, 2020, compared to $197.0 million, or $2.97 per diluted share for the year ended Dec. 31, 2019. For the fourth quarter of 2020, net income attributable to Avista Corp. shareholders was $58.7 million, or $0.85 per diluted share, compared to $50.8 million, or $0.76 per diluted share...