Avista (NYSE:AVA) reported quarterly earnings of $0.87 per share which missed the analyst consensus estimate of $1.11 by 21.62 percent. This is a 3.57 percent increase over earnings of $0.84 per share from the same period last year. The company reported quarterly sales of $518.000 million which beat the analyst consensus estimate of $515.898 million by 0.41 percent. This is a 0.19 percent increase over sales of $517.000 million the same period last year.