RLI Corp. is a specialty insurer serving niche property, casualty, and surety markets. The Company provides underwriting expertise and service to commercial and personal line customers nationwide. The Company's segment includes Casualty, Property, and Surety. The casualty portion of its business consists largely of commercial excess, personal umbrella, general liability, transportation, and management liability coverages, as well as package business and other specialty coverages, such as professional liability and worker’s compensation for office-based professionals. Its property segment is composed primarily of commercial fire, hurricane, earthquake, difference in conditions, and marine coverage. Its Surety segment specializes in writing small to medium-sized contract surety coverage, including payment and performance bonds. Its products are offered through its insurance subsidiaries, RLI Insurance Company, Mt. Hawley Insurance Company and Contractors Bonding and Insurance Company.