Flagging bank accounts? See Banner Corporation. Banner is the holding company for Banner Bank, which serves the Pacific Northwest through about 90 branches and loan production offices in Washington, Oregon, and Idaho. The company also owns Islanders Bank, which operates three branches in Washington's San Juan Islands. The banks offer standard products such as deposit accounts, credit cards, and business and consumer loans. Commercial loans, including business, agriculture, construction, and multifamily mortgage loans, account for about 90% of the company's portfolio. Bank subsidiary Community Financial writes residential mortgage and construction loans.