ProAssurance Corporation is a holding company for property and casualty insurance companies focused on professional liability insurance. The Company's insurance subsidiaries are primarily focused on providing professional liability insurance to individuals and institutions engaged in the delivery of healthcare. It also maintains a book of legal professional liability business. The Company also offers professional liability insurance on an excess and surplus lines basis. It is licensed to do business in every state. The Company utilizes independent agencies, as well as an internal sales force to write its business. During the year ended December 31, 2011, the Company estimated that approximately 64% of its gross premiums written were produced through independent insurance agencies. In November 2012, the Company acquired Independent Nevada Doctors Insurance Exchange (IND).