Investments (Details 1) (USD $) | 9 Months Ended | 12 Months Ended |
In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013 |
| Number | Number |
Fixed maturity securities, Fair Value | ' | | ' | |
Fixed maturity securities, Fair Value, 12 Months or Less | $776,944 | | $1,672,852 | |
Fixed maturity securities, Fair Value, More than 12 Months | 510,314 | | 83,093 | |
Fixed maturity securities, Fair Value, Total | 1,287,258 | | 1,755,945 | |
Fixed maturity securities, Gross Unrealized Losses | ' | | ' | |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 8,258 | | 108,594 | |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 27,637 | | 13,943 | |
Fixed maturity securities, Gross Unrealized Losses, Total | 35,895 | | 122,537 | |
Number of positions with a gross unrealized loss position, 12 Months or Less | 291 | | 534 | |
Number of position with a gross unrealized loss position, more than 12 months | 149 | | 46 | |
Number of position with a gross unrealized loss position, Total | 440 | | 580 | |
Fair value as a percentage of total fixed maturities and equity securities fair value, 12 Months or Less | 11.30% | | 27.40% | |
Fair value as a percentage of total fixed maturities and equity securities fair value, more than 12 months | 7.40% | | 1.40% | |
Fair value as a percentage of total fixed maturities and equity securities fair value, Total | 18.70% | | 28.80% | |
Mortgage-backed securities [Member] | ' | | ' | |
Fixed maturity securities, Fair Value | ' | | ' | |
Fixed maturity securities, Fair Value, 12 Months or Less | 5,215 | | 150,602 | |
Fixed maturity securities, Fair Value, More than 12 Months | 60,111 | | 1,383 | |
Fixed maturity securities, Fair Value, Total | 65,326 | | 151,985 | |
Fixed maturity securities, Gross Unrealized Losses | ' | | ' | |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 121 | | 19,145 | |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 4,213 | | 415 | |
Fixed maturity securities, Gross Unrealized Losses, Total | 4,334 | | 19,560 | |
Other [Member] | ' | | ' | |
Fixed maturity securities, Fair Value | ' | | ' | |
Fixed maturity securities, Fair Value, 12 Months or Less | 39,248 | | 249,765 | |
Fixed maturity securities, Fair Value, More than 12 Months | 127,454 | | 4,450 | |
Fixed maturity securities, Fair Value, Total | 166,702 | | 254,215 | |
Fixed maturity securities, Gross Unrealized Losses | ' | | ' | |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 195 | | 22,479 | |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 7,287 | | 872 | |
Fixed maturity securities, Gross Unrealized Losses, Total | 7,482 | | 23,351 | |
Municipal bonds [Member] | ' | | ' | |
Fixed maturity securities, Fair Value | ' | | ' | |
Fixed maturity securities, Fair Value, 12 Months or Less | 50,593 | | 375,523 | |
Fixed maturity securities, Fair Value, More than 12 Months | 75,448 | | 42,899 | |
Fixed maturity securities, Fair Value, Total | 126,041 | | 418,422 | |
Fixed maturity securities, Gross Unrealized Losses | ' | | ' | |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 223 | | 26,529 | |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 5,642 | | 8,086 | |
Fixed maturity securities, Gross Unrealized Losses, Total | 5,865 | | 34,615 | |
Foreign government bonds [Member] | ' | | ' | |
Fixed maturity securities, Fair Value | ' | | ' | |
Fixed maturity securities, Fair Value, 12 Months or Less | 3,940 | | 6,738 | |
Fixed maturity securities, Fair Value, More than 12 Months | 0 | | 0 | |
Fixed maturity securities, Fair Value, Total | 3,940 | | 6,738 | |
Fixed maturity securities, Gross Unrealized Losses | ' | | ' | |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 60 | | 390 | |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 0 | | 0 | |
Fixed maturity securities, Gross Unrealized Losses, Total | 60 | | 390 | |
Corporate bonds [Member] | ' | | ' | |
Fixed maturity securities, Fair Value | ' | | ' | |
Fixed maturity securities, Fair Value, 12 Months or Less | 232,074 | | 582,849 | |
Fixed maturity securities, Fair Value, More than 12 Months | 120,928 | | 12,948 | |
Fixed maturity securities, Fair Value, Total | 353,002 | | 595,797 | |
Fixed maturity securities, Gross Unrealized Losses | ' | | ' | |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 3,571 | | 28,634 | |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 6,037 | | 3,516 | |
Fixed maturity securities, Gross Unrealized Losses, Total | 9,608 | | 32,150 | |
Other mortgage-backed securities [Member] | ' | | ' | |
Fixed maturity securities, Fair Value | ' | | ' | |
Fixed maturity securities, Fair Value, 12 Months or Less | 431,870 | | 274,983 | |
Fixed maturity securities, Fair Value, More than 12 Months | 99,814 | | 20,008 | |
Fixed maturity securities, Fair Value, Total | 531,684 | | 294,991 | |
Fixed maturity securities, Gross Unrealized Losses | ' | | ' | |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 2,809 | | 8,300 | |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 2,935 | | 552 | |
Fixed maturity securities, Gross Unrealized Losses, Total | 5,744 | | 8,852 | |
Total fixed maturity securities [Member] | ' | | ' | |
Fixed maturity securities, Fair Value | ' | | ' | |
Fixed maturity securities, Fair Value, 12 Months or Less | 762,940 | | 1,640,460 | |
Fixed maturity securities, Fair Value, More than 12 Months | 483,755 | | 81,688 | |
Fixed maturity securities, Fair Value, Total | 1,246,695 | | 1,722,148 | |
Fixed maturity securities, Gross Unrealized Losses | ' | | ' | |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 6,979 | | 105,477 | |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 26,114 | | 13,441 | |
Fixed maturity securities, Gross Unrealized Losses, Total | 33,093 | | 118,918 | |
Equity securities [Member] | ' | | ' | |
Fixed maturity securities, Fair Value | ' | | ' | |
Fixed maturity securities, Fair Value, 12 Months or Less | 14,004 | [1] | 32,392 | [1] |
Fixed maturity securities, Fair Value, More than 12 Months | 26,559 | [1] | 1,405 | [1] |
Fixed maturity securities, Fair Value, Total | 40,563 | [1] | 33,797 | [1] |
Fixed maturity securities, Gross Unrealized Losses | ' | | ' | |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 1,279 | [1] | 3,117 | [1] |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 1,523 | [1] | 502 | [1] |
Fixed maturity securities, Gross Unrealized Losses, Total | $2,802 | [1] | $3,619 | [1] |
|
[1] | Includes nonredeemable (perpetual) preferred stocks, common stocks and closed-end funds. |