Westamerica Bancorporation is a bank holding company. The Company provides a full range of banking services to individual and corporate customers in Northern and Central California through its subsidiary bank, Westamerica Bank (WAB). WAB owns 100% of the capital stock of Community Banker Services Corporation (CBSC), a company engaged in providing the Company and its subsidiaries with data processing services and other support functions. The Company provides banking services for businesses, such as online services, checking, savings, loans and lines of credit, cash management, merchant services, ExpressDeposit Remote Deposit Capture, business trust services, bank owned property and preventing business losses. The Company provides banking services for individual customers, such as online services, checking, savings, trust services, loans and lines of credit, overdraft service, order checks and manage your account.