First Interstate BancSystem, Inc. operates as the bank holding company for First Interstate Bank that provides range of banking products and services in the United States. Its deposit products include checking, savings, time, and demand deposits; and repurchase agreements primarily for commercial and municipal depositors. The company's loan portfolio consists of real estate loans, including commercial real estate, construction, residential, agricultural, and other real estate loans; consumer loans; commercial loans; and other loans, including fixed and variable rate loans. It also provides a range of trust, employee benefit, investment management, insurance, agency, and custodial services to individuals, businesses, and nonprofit organizations, which include the administration of estates and personal trusts; management of investment accounts for individuals, employee benefit plans, and charitable foundations; and insurance planning. In addition, the company offers Internet and mobile banking services. It serves individuals, businesses, municipalities, and other entities in various industries, including energy, healthcare and professional services, education and governmental services, construction, mining, agriculture, retail and wholesale trade, and tourism. The company operates 80 banking offices in 46 communities located in Montana, Wyoming, and South Dakota. First Interstate BancSystem, Inc. was incorporated in 1971 and is headquartered in Billings, Montana.