MDU Resources Gr (NYSE:MDU) reported quarterly earnings of $0.40 per share which beat the analyst consensus estimate of $0.33 by 21.21 percent. This is a 23.08 percent decrease over earnings of $0.52 per share from the same period last year. The company reported quarterly sales of $674.80 million which beat the analyst consensus estimate of $653.13 million by 3.32 percent. This is a 44.37 percent decrease over sales of $1.21 billion the same period last year.