First Interstate BancSys (NASDAQ:FIBK) reported quarterly earnings of $1.08 per share which beat the analyst consensus estimate of $0.81 by 33.66 percent. This is a 116 percent increase over earnings of $0.50 per share from the same period last year. The company reported quarterly sales of $313.000 million which beat the analyst consensus estimate of $246.923 million by 26.76 percent. This is a 19.79 percent increase over sales of $261.300 million the same period last year.