Arch Capital Group Ltd., together with its subsidiaries, provides insurance and reinsurance products worldwide. It operates in two segments, Insurance and Reinsurance. The Insurance segment offers casualty; construction; executive assurance; healthcare; national accounts casualty; professional liability; programs; property, energy, marine, and aviation; surety; and travel and accident insurance products. It also provides other insurance products, such as excess workers compensation and employers' liability insurance coverages for qualified self-insured groups, associations, and trusts; collateral protection insurance coverages for financial institutions and specialty insurance coverage for automotive dealers; captive insurance programs; and accident, disability, and medical plan insurance coverages for employer groups, medical plan members, students, and other participant groups. This segment markets its products through a network of licensed independent retail and wholesale brokers. The Reinsurance segment reinsures third party liability and worker