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Investments (Cumulative Noncredit Portion of Other Than Temporary Impairment Recognized in Other Comprehensive Income and Change in Fair Value Since Other Than Temporary Impairment) (Details) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Investment Holdings [Line Items] |  |
Amortized cost | $ 503,432 | $ 569,508
OTTI recognized in other comprehensive income | (176,757) | (173,494)
Change in fair value since OTTI was recognized | 205,160 | 215,636
Fair value | 531,835 | 611,650
Fixed Maturity Securities [Member] | Corporate Securities [Member] |  |
Investment Holdings [Line Items] |  |
Amortized cost | 0 | 0
OTTI recognized in other comprehensive income | 0 | 0
Change in fair value since OTTI was recognized | 20 | 11
Fair value | 20 | 11
Fixed Maturity Securities [Member] | Residential Mortgage Backed Securities [Member] |  |
Investment Holdings [Line Items] |  |
Amortized cost | 495,278 | 569,508
OTTI recognized in other comprehensive income | (171,632) | (173,494)
Change in fair value since OTTI was recognized | 205,140 | 215,625
Fair value | 528,786 | $ 611,639
Fixed Maturity Securities [Member] | Other Asset Backed Securities [Member] |  |
Investment Holdings [Line Items] |  |
Amortized cost | 8,154 |
OTTI recognized in other comprehensive income | (5,125) |
Change in fair value since OTTI was recognized | 0 |
Fair value | $ 3,029 |

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- Definition Change in Fair Value of Securities with Noncredit Other Than Temporary impairment Losses + References No definition available. + Details
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- Definition Represents the fair value of securities with noncredit other than temporary impairment losses as of the reporting date. + References No definition available. + Details
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- Definition The cummulative amount of other than temporary impairment (OTTI) loss on a debt security, categorized as either Available-for-sale or Held-to-maturity, related to factors other than credit losses when the entity does not intend to sell the security and it is not more likely than not that the entity will be required to sell the security before recovery of its amortized cost basis that has been recognized since this accounting standard became effective. This amount which is attributable to the parent, is a portion of the deduction from the total impairment losses of Investments (before taxes) presented on the income statement. + References No definition available. + Details
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