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Investments (Schedule of Other Than Temporary Impairment Losses, Investments) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Investment Holdings [Line Items] |  |
Amortized cost | $ 248,456 | $ 352,207
OTTI recognized in other comprehensive income (loss) | (149,146) | (171,546)
Change in fair value since OTTI was recognized | 181,705 | 205,712
Fair value | 281,015 | 386,373
Corporate Securities |  |
Investment Holdings [Line Items] |  |
Amortized cost | 50,755 | 69,580
OTTI recognized in other comprehensive income (loss) | (3,700) | (3,700)
Change in fair value since OTTI was recognized | 9,268 | 6,195
Fair value | 56,323 | 72,075
Residential Mortgage Backed Securities |  |
Investment Holdings [Line Items] |  |
Amortized cost | 183,948 | 245,691
OTTI recognized in other comprehensive income (loss) | (145,446) | (167,846)
Change in fair value since OTTI was recognized | 172,577 | 199,191
Fair value | 211,079 | 277,036
Commercial Mortgage Backed Securities |  |
Investment Holdings [Line Items] |  |
Amortized cost | 12,776 | 35,244
OTTI recognized in other comprehensive income (loss) | 0 | 0
Change in fair value since OTTI was recognized | (401) | 0
Fair value | 12,375 | 35,244
Other Asset Backed Securities |  |
Investment Holdings [Line Items] |  |
Amortized cost | 977 | 1,692
OTTI recognized in other comprehensive income (loss) | 0 | 0
Change in fair value since OTTI was recognized | 261 | 326
Fair value | $ 1,238 | $ 2,018

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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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- Definition Amortized cost of securities with noncredit OTTI losses recognized during the reporting period. + References No definition available. + Details
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