arch capital group ltd., together with its subsidiaries, provides insurance, reinsurance, and mortgage insurance products worldwide. the company's insurance segment offers primary and excess casualty coverages; loss sensitive primary casualty insurance programs; collateral protection, debt cancellation, and service contract reimbursement products; directors' and officers' liability, errors and omissions liability, employment practices and fiduciary liability, crime, professional indemnity, and other financial related coverages; medical professional and general liability insurance coverages; and workers' compensation and umbrella liability, as well as commercial automobile and inland marine products. it also provides property, energy, marine, and aviation insurance; travel insurance; accident, disability, and medical plan insurance coverages; captive insurance programs; and contract and commercial surety coverages. this segment markets its products through a group of licensed independen