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Investments (Schedule of Other Than Temporary Impairment Losses, Investments) (Details) - Fixed Maturity Securities [Member] - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Investment Holdings [Line Items] |  |
Amortized cost | $ 399,690 | $ 481,421
OTTI recognized in other comprehensive income | (177,494) | (178,824)
Change in fair value since OTTI was recognized | 217,747 | 198,605
Fair value | 439,943 | 501,202
Corporate Securities [Member] |  |
Investment Holdings [Line Items] |  |
Amortized cost | 17,549 | 6,396
OTTI recognized in other comprehensive income | (5,910) | (2,975)
Change in fair value since OTTI was recognized | 13,566 | 9
Fair value | 25,205 | 3,430
Residential Mortgage Backed Securities [Member] |  |
Investment Holdings [Line Items] |  |
Amortized cost | 368,862 | 466,871
OTTI recognized in other comprehensive income | (169,941) | (170,724)
Change in fair value since OTTI was recognized | 205,854 | 199,149
Fair value | 404,775 | 495,296
Commercial Mortgage Backed Securities [Member] |  |
Investment Holdings [Line Items] |  |
Amortized cost | 6,596 |
OTTI recognized in other comprehensive income | 0 |
Change in fair value since OTTI was recognized | (107) |
Fair value | 6,489 |
Other Asset Backed Securities [Member] |  |
Investment Holdings [Line Items] |  |
Amortized cost | 6,683 | 8,154
OTTI recognized in other comprehensive income | (1,643) | (5,125)
Change in fair value since OTTI was recognized | (1,566) | (553)
Fair value | $ 3,474 | $ 2,476

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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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