XML 156 R33.htm IDEA: XBRL DOCUMENT v2.4.0.8
Investments (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 11,346,144 $ 11,333,431
Unrealized Losses 310,734 133,558
Estimated Fair Value 11,803,481 12,380,071
% of Total 100.00% 100.00%
Fixed maturity securities
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 19,757,321 19,559,432
Unrealized Gains 1,831,490 2,864,436
Unrealized Losses 304,595 132,254
Estimated Fair Value 21,284,216 22,291,614
% of Total 100.00% 100.00%
Other-than-temporary impairments in AOCI (7,625) (8,625)
Equity securities
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 159,756 217,046
Unrealized Gains 6,722 6,958
Unrealized Losses 6,139 1,304
Estimated Fair Value 160,339 222,700
% of Total 100.00% 100.00%
Corporate securities | Fixed maturity securities
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 11,346,144 11,333,431
Unrealized Gains 648,955 1,085,973
Unrealized Losses 191,618 39,333
Estimated Fair Value 11,803,481 12,380,071
% of Total 55.40% 55.50%
Other-than-temporary impairments in AOCI 0 0
Canadian and Canadian provincial governments | Fixed maturity securities
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 2,633,388 2,676,777
Unrealized Gains 901,567 1,372,731
Unrealized Losses 9,162 174
Estimated Fair Value 3,525,793 4,049,334
% of Total 16.60% 18.20%
Other-than-temporary impairments in AOCI 0 0
Residential mortgage-backed securities | Fixed maturity securities
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 1,015,155 969,267
Unrealized Gains 53,581 76,520
Unrealized Losses 13,768 3,723
Estimated Fair Value 1,054,968 1,042,064
% of Total 5.00% 4.70%
Other-than-temporary impairments in AOCI (241) (241)
Asset-backed securities | Fixed maturity securities
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 789,849 700,455
Unrealized Gains 18,998 19,898
Unrealized Losses 18,537 28,798
Estimated Fair Value 790,310 691,555
% of Total 3.70% 3.10%
Other-than-temporary impairments in AOCI (2,259) (2,259)
Commercial mortgage-backed securities | Fixed maturity securities
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 1,564,924 1,608,376
Unrealized Gains 110,294 142,369
Unrealized Losses 36,586 51,842
Estimated Fair Value 1,638,632 1,698,903
% of Total 7.70% 7.60%
Other-than-temporary impairments in AOCI (5,125) (6,125)
US government and agencies | Fixed maturity securities
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 394,026 231,256
Unrealized Gains 21,417 33,958
Unrealized Losses 2,453 24
Estimated Fair Value 412,990 265,190
% of Total 1.90% 1.20%
Other-than-temporary impairments in AOCI 0 0
State and political subdivisions | Fixed maturity securities
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 278,148 270,086
Unrealized Gains 25,513 38,058
Unrealized Losses 11,850 5,646
Estimated Fair Value 291,811 302,498
% of Total 1.40% 1.40%
Other-than-temporary impairments in AOCI 0 0
Other foreign government, supranational and foreign government-sponsored enterprises | Fixed maturity securities
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 1,735,687 1,769,784
Unrealized Gains 51,165 94,929
Unrealized Losses 20,621 2,714
Estimated Fair Value 1,766,231 1,861,999
% of Total 8.30% 8.30%
Other-than-temporary impairments in AOCI 0 0
Non-redeemable preferred stock | Equity securities
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 85,483 68,469
Unrealized Gains 6,722 6,542
Unrealized Losses 1,747 170
Estimated Fair Value 90,458 74,841
% of Total 56.40% 33.60%
Other equity securities | Equity securities
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 74,273 148,577
Unrealized Gains 0 416
Unrealized Losses 4,392 1,134
Estimated Fair Value $ 69,881 $ 147,859
% of Total 43.60% 66.40%