Investments (Narrative) (Details) (USD $) | 3 Months Ended | 9 Months Ended | |
|---|---|---|---|
Sep. 30, 2011 | Sep. 30, 2011 | Sep. 30, 2010 | |
| Fixed maturity investments available for sale securities in unrealized loss position for twelve months or greater | 24 | 24 | |
| Cash and investments at fair value on deposit or in trust accounts | $ 895,500,000 | $ 895,500,000 | |
| Assets Held by Insurance Regulators | 78,900,000 | 78,900,000 | |
| Other-than-temporary-impairments | 498,000 | 498,000 | 831,000 |
Recognized Due To Intent To Sell Securities [Member] | |||
| Other-than-temporary-impairments | |||
Recognized Due To Required Sales Of Securities [Member] | |||
| Other-than-temporary-impairments | |||
Credit Related [Member] | |||
| Other-than-temporary-impairments | 400,000 | 800,000 | |
Related To Other Factors [Member] | |||
| Other-than-temporary-impairments | $ 49,000 | $ 2,000 | |
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- Definition This item represents the number of positions of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer.
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- Definition Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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