Mid-Continent Casualty Company is a member of the Great American Insurance Group. The Great American Insurance Group's property and casualty operation is one of the 30 largest in the United States. Mid-Continent is a group of regional specialty insurance companies that write commercial casualty, personal lines and bonds in more than 20 states. Mid-Continent offers auto insurance, home/business owner insurance, inland marine, surety bond and commercial lines. Mid-Continent Casualty Company has a branch office located in Tulsa, Okla., where it employs nearly 300 people.