 BILLINGS, Mont.--BUSINESS WIRE--First Interstate BancSystem, Inc. NASDAQ: FIBK today reported financial results for the fourth quarter of 2020. For the quarter, the Company reported net income of 46.9 million, or 0.76 per share, which compares to net income of 48.3 million, or 0.76 per share, for the third quarter of 2020, and 52.4 million, or 0.80 per share, for the fourth quarter of 2019. The fourth quarter of 2019 included acquisition costs of 0.7 million related to the acquisitio 