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Investments (Details 1) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2014 Number | Dec. 31, 2013 Number
Fixed maturity securities, Fair Value |  |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | $ 370,998 |  | $ 1,672,852 |
Fixed maturity securities, Fair Value, More than 12 Months | 721,280 |  | 83,093 |
Fixed maturity securities, Fair Value, Total | 1,092,278 |  | 1,755,945 |
Fixed maturity securities, Gross Unrealized Losses |  |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 5,452 |  | 108,594 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 30,210 |  | 13,943 |
Fixed maturity securities, Gross Unrealized Losses, Total | 35,662 |  | 122,537 |
Number of positions with a gross unrealized loss position, 12 Months or Less | 115 |  | 534 |
Number of position with a gross unrealized loss position, more than 12 months | 202 |  | 46 |
Number of position with a gross unrealized loss position, Total | 317 |  | 580 |
Fair value as a percentage of total fixed maturities and equity securities fair value, 12 Months or Less | 5.50% |  | 27.40% |
Fair value as a percentage of total fixed maturities and equity securities fair value, more than 12 months | 10.60% |  | 1.40% |
Fair value as a percentage of total fixed maturities and equity securities fair value, Total | 16.10% |  | 28.80% |
Mortgage-backed securities [Member] |  |  |  |
Fixed maturity securities, Fair Value |  |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 13,483 |  | 150,602 |
Fixed maturity securities, Fair Value, More than 12 Months | 95,845 |  | 1,383 |
Fixed maturity securities, Fair Value, Total | 109,328 |  | 151,985 |
Fixed maturity securities, Gross Unrealized Losses |  |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 637 |  | 19,145 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 9,054 |  | 415 |
Fixed maturity securities, Gross Unrealized Losses, Total | 9,691 |  | 19,560 |
Other [Member] |  |  |  |
Fixed maturity securities, Fair Value |  |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 5,257 |  | 249,765 |
Fixed maturity securities, Fair Value, More than 12 Months | 165,165 |  | 4,450 |
Fixed maturity securities, Fair Value, Total | 170,422 |  | 254,215 |
Fixed maturity securities, Gross Unrealized Losses |  |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 26 |  | 22,479 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 7,981 |  | 872 |
Fixed maturity securities, Gross Unrealized Losses, Total | 8,007 |  | 23,351 |
Municipal bonds [Member] |  |  |  |
Fixed maturity securities, Fair Value |  |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 45,797 |  | 375,523 |
Fixed maturity securities, Fair Value, More than 12 Months | 151,155 |  | 42,899 |
Fixed maturity securities, Fair Value, Total | 196,952 |  | 418,422 |
Fixed maturity securities, Gross Unrealized Losses |  |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 2,883 |  | 26,529 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 4,632 |  | 8,086 |
Fixed maturity securities, Gross Unrealized Losses, Total | 7,515 |  | 34,615 |
Foreign government bonds [Member] |  |  |  |
Fixed maturity securities, Fair Value |  |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 0 |  | 6,738 |
Fixed maturity securities, Fair Value, More than 12 Months | 0 |  | 0 |
Fixed maturity securities, Fair Value, Total | 0 |  | 6,738 |
Fixed maturity securities, Gross Unrealized Losses |  |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 0 |  | 390 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 0 |  | 0 |
Fixed maturity securities, Gross Unrealized Losses, Total | 0 |  | 390 |
Corporate bonds [Member] |  |  |  |
Fixed maturity securities, Fair Value |  |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 45,966 |  | 582,849 |
Fixed maturity securities, Fair Value, More than 12 Months | 200,615 |  | 12,948 |
Fixed maturity securities, Fair Value, Total | 246,581 |  | 595,797 |
Fixed maturity securities, Gross Unrealized Losses |  |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 432 |  | 28,634 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 5,191 |  | 3,516 |
Fixed maturity securities, Gross Unrealized Losses, Total | 5,623 |  | 32,150 |
Other mortgage-backed securities [Member] |  |  |  |
Fixed maturity securities, Fair Value |  |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 259,347 |  | 274,983 |
Fixed maturity securities, Fair Value, More than 12 Months | 79,799 |  | 20,008 |
Fixed maturity securities, Fair Value, Total | 339,146 |  | 294,991 |
Fixed maturity securities, Gross Unrealized Losses |  |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 1,463 |  | 8,300 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 2,474 |  | 552 |
Fixed maturity securities, Gross Unrealized Losses, Total | 3,937 |  | 8,852 |
Total fixed maturity securities [Member] |  |  |  |
Fixed maturity securities, Fair Value |  |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 369,850 |  | 1,640,460 |
Fixed maturity securities, Fair Value, More than 12 Months | 692,579 |  | 81,688 |
Fixed maturity securities, Fair Value, Total | 1,062,429 |  | 1,722,148 |
Fixed maturity securities, Gross Unrealized Losses |  |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 5,441 |  | 105,477 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 29,332 |  | 13,441 |
Fixed maturity securities, Gross Unrealized Losses, Total | 34,773 |  | 118,918 |
Equity securities [Member] |  |  |  |
Fixed maturity securities, Fair Value |  |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 1,148 | [1] | 32,392 | [1]
Fixed maturity securities, Fair Value, More than 12 Months | 28,701 | [1] | 1,405 | [1]
Fixed maturity securities, Fair Value, Total | 29,849 | [1] | 33,797 | [1]
Fixed maturity securities, Gross Unrealized Losses |  |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 11 | [1] | 3,117 | [1]
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 878 | [1] | 502 | [1]
Fixed maturity securities, Gross Unrealized Losses, Total | $ 889 | [1] | $ 3,619 | [1]
[1] | Includes nonredeemable (perpetual) preferred stocks, common stocks and closed-end funds.

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