First Interstate BancSystem, Inc. operates as the bank holding company for First Interstate Bank that provides commercial and consumer banking services. 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, consumer, commercial, agricultural, and other loans, including fixed and variable rate loans. Its real estate loans comprise commercial real estate, construction, residential, agricultural, and other real estate loans. The company also provides a range of trust, employee benefit, investment management, insurance, agency, and custodial services to individuals, businesses, and nonprofit organizations. These services include the administration of estates and personal trusts; management of investment accounts for individuals, employee benefit plans, and charitable foundations; and insurance planning. 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. As of March 22, 2013, the company operated 76 banking offices in 42 communities located in Montana, Wyoming, and western South Dakota. First Interstate BancSystem, Inc. was incorporated in 1971 and is headquartered in Billings, Montana.