St. Louis-based multiline specialty insurance carrier Safety National Casualty Corp. has acquired Oklahoma-based Midlands Management Corp.

Midlands Management is a managing general agent, wholesale broker, program administrator and insurance services provider specializing in excess workers' compensation.

As a result of the transaction, Midlands Management became a wholly owned subsidiary of Safety National and a member of the Tokio Marine Group. The acquisition will have no effect on the executive teams of both companies and on Midlands Management's operations and headquarters.