XML 76 R58.htm IDEA: XBRL DOCUMENT v3.8.0.1
Investments - Gross Unrealized Losses of Fixed Maturities and Equity Securities in Unrealized Loss Position (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
security
Dec. 31, 2016
USD ($)
security
Fixed maturity securities, Fair Value    
Fixed maturity securities, Fair Value, 12 Months or Less $ 910,409 $ 1,994,925
Fixed maturity securities, Fair Value, More than 12 Months 448,829 307,486
Fixed maturity securities, Fair Value, Total 1,359,238 2,302,411
Fixed maturity securities, Gross Unrealized Losses    
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less 8,743 61,692
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months 14,044 14,292
Fixed maturity securities, Gross Unrealized Losses, Total $ 22,787 $ 75,984
Number of positions with a gross unrealized loss position, 12 Months or Less | security 354 629
Number of position with a gross unrealized loss position, more than 12 months | security 158 102
Number of position with a gross unrealized loss position, Total | security 512 731
Fair value as a percentage of total fixed maturities and equity securities fair value, 12 Months or Less 11.60% 26.30%
Fair value as a percentage of total fixed maturities and equity securities fair value, more than 12 months 5.70% 4.00%
Fair value as a percentage of total fixed maturities and equity securities fair value, Total 17.30% 30.30%
Total fixed maturity securities    
Fixed maturity securities, Fair Value    
Fixed maturity securities, Fair Value, 12 Months or Less $ 904,382 $ 1,938,249
Fixed maturity securities, Fair Value, More than 12 Months 447,552 299,530
Fixed maturity securities, Fair Value, Total 1,351,934 2,237,779
Fixed maturity securities, Gross Unrealized Losses    
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less 8,494 57,125
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months 14,014 13,285
Fixed maturity securities, Gross Unrealized Losses, Total 22,508 70,410
Mortgage-backed securities    
Fixed maturity securities, Fair Value    
Fixed maturity securities, Fair Value, 12 Months or Less 134,032 76,573
Fixed maturity securities, Fair Value, More than 12 Months 40,606 3,235
Fixed maturity securities, Fair Value, Total 174,638 79,808
Fixed maturity securities, Gross Unrealized Losses    
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less 1,053 3,096
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months 1,979 544
Fixed maturity securities, Gross Unrealized Losses, Total 3,032 3,640
Other    
Fixed maturity securities, Fair Value    
Fixed maturity securities, Fair Value, 12 Months or Less 168,634 219,372
Fixed maturity securities, Fair Value, More than 12 Months 122,753 0
Fixed maturity securities, Fair Value, Total 291,387 219,372
Fixed maturity securities, Gross Unrealized Losses    
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less 1,849 10,120
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months 3,667 0
Fixed maturity securities, Gross Unrealized Losses, Total 5,516 10,120
Municipal bonds    
Fixed maturity securities, Fair Value    
Fixed maturity securities, Fair Value, 12 Months or Less 29,437 408,163
Fixed maturity securities, Fair Value, More than 12 Months 79,140 9,928
Fixed maturity securities, Fair Value, Total 108,577 418,091
Fixed maturity securities, Gross Unrealized Losses    
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less 100 19,006
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months 2,335 3,582
Fixed maturity securities, Gross Unrealized Losses, Total 2,435 22,588
Foreign government bonds    
Fixed maturity securities, Fair Value    
Fixed maturity securities, Fair Value, 12 Months or Less 0 24,182
Fixed maturity securities, Fair Value, More than 12 Months 0 0
Fixed maturity securities, Fair Value, Total 0 24,182
Fixed maturity securities, Gross Unrealized Losses    
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less 0 297
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months 0 0
Fixed maturity securities, Gross Unrealized Losses, Total 0 297
Corporate bonds    
Fixed maturity securities, Fair Value    
Fixed maturity securities, Fair Value, 12 Months or Less 115,113 459,402
Fixed maturity securities, Fair Value, More than 12 Months 36,081 57,261
Fixed maturity securities, Fair Value, Total 151,194 516,663
Fixed maturity securities, Gross Unrealized Losses    
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less 2,701 11,056
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months 1,633 3,770
Fixed maturity securities, Gross Unrealized Losses, Total 4,334 14,826
Other mortgage-backed securities    
Fixed maturity securities, Fair Value    
Fixed maturity securities, Fair Value, 12 Months or Less 457,166 750,557
Fixed maturity securities, Fair Value, More than 12 Months 168,972 229,106
Fixed maturity securities, Fair Value, Total 626,138 979,663
Fixed maturity securities, Gross Unrealized Losses    
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less 2,791 13,550
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months 4,400 5,389
Fixed maturity securities, Gross Unrealized Losses, Total 7,191 18,939
Equity securities    
Fixed maturity securities, Fair Value    
Fixed maturity securities, Fair Value, 12 Months or Less 6,027 56,676
Fixed maturity securities, Fair Value, More than 12 Months 1,277 7,956
Fixed maturity securities, Fair Value, Total 7,304 64,632
Fixed maturity securities, Gross Unrealized Losses    
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less 249 4,567
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months 30 1,007
Fixed maturity securities, Gross Unrealized Losses, Total $ 279 $ 5,574