Columbia Banking System, Inc. operates as the bank holding company for Columbia State Bank that provides a range of banking services to small and medium-sized businesses, professionals, and individuals in Washington, Oregon, and Idaho. It offers personal banking products and services, including non-interest and interest-bearing checking, saving, money market, and certificate of deposit accounts; home mortgages for purchases and refinances, home equity loans and lines of credit, and personal loans; debit and credit cards; and digital banking services. The company also provides business banking products and services, such as checking, savings, interest-bearing money market, and certificate of deposit accounts; agricultural, asset-based, builder and other commercial real estate loans, as well as loans guaranteed by the small business; debit and credit cards; and professional banking, treasury management, merchant card, and international banking services. In addition, it offers wealth management services in the areas of private banking, financial services, and trust and investment services to individuals, families, and professional businesses. Further, the company provides fiduciary, agency, trust, and related services, as well as life insurance products. The company operates approximately 150 branches. Columbia Banking System, Inc. was founded in 1993 and is headquartered in Tacoma, Washington.