MDU Resources Gr (NYSE:MDU) reported quarterly earnings of $0.39 per share which missed the analyst consensus estimate of $0.42 by 7.14 percent. This is a 2.5 percent decrease over earnings of $0.40 per share from the same period last year. The company reported quarterly sales of $606.000 million which missed the analyst consensus estimate of $688.260 million by 11.95 percent. This is a 10.20 percent decrease over sales of $674.800 million the same period last year.