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Nature of Operations | 12 Months Ended
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Dec. 31, 2011
Nature of Operations | ## 1. Nature of Operations AmTrust Financial Services, Inc. (the “Company”) is an insurance holding company formed under the laws of Delaware. Through its wholly-owned subsidiaries, the Company provides specialty property and casualty insurance focusing on workers’ compensation and commercial package coverage for small business, specialty risk and extended warranty coverage, and property and casualty coverage for middle market business. The Company also provides reinsurance, primarily on personal and commercial automotive business. The Company transacts business through eleven insurance company subsidiaries: Technology Insurance Company, Inc. (“TIC”), Rochdale Insurance Company (“RIC”), Wesco Insurance Company (“WIC”), Associated Industries Insurance Company, Inc. (“AIIC”), Milwaukee Casualty Insurance Company (“MCIC”), Security National Insurance Company (“SNIC”), AmTrust Insurance Company of Kansas, Inc. (“AICK”) and AmTrust Lloyd’s Insurance Company of Texas (“ALIC”), which are domiciled in New Hampshire, New York, Delaware, Florida, Wisconsin, Texas, Kansas and Texas, respectively; and AmTrust International Insurance Ltd. (“AII”), AmTrust International Underwriters Limited (“AIU”) and AmTrust Europe, Ltd. (“AEL”), which are domiciled in Bermuda, Ireland and England, respectively.

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- Definition The entire disclosure for the nature of an entity's business, the major products or services it sells or provides and its principal markets, including the locations of those markets. If the entity operates in more than one business, the disclosure also indicates the relative importance of its operations in each business and the basis for the determination (for example, assets, revenues, or earnings). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Name Statement of Position (SOP) -Publisher AICPA -Number 94-6 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6003-108592 + Details
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