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Subsequent Event | 9 Months Ended
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Sep. 30, 2012
Subsequent Events [Abstract] |
Subsequent Events | Note 16. Subsequent Event On October 16, 2012, OneBeacon announced it entered into an agreement to terminate its exclusive underwriting agreement with Hagerty Insurance Agency and to sell one of its insurance entities to Markel Corporation. OneBeacon anticipates recording an after-tax gain of $15 million related to this transaction. The sale is subject to regulatory approvals and is expected to close during the first quarter of 2013. The business associated with this agreement generated written premiums of approximately $179 million, or 16% of OneBeacon's consolidated written premiums for the twelve months prior to September 30, 2012.

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- Definition The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business. + References No definition available. + Details
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