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Investments Investments (Tables) | 9 Months Ended
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Sep. 30, 2012
Investments [Abstract] |
Investment Holdings, Schedule of Investments [Table Text Block] |
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
| (Dollars in thousands)
September 30, 2012 |  |  |  |  |  |  |
Fixed maturity securities: |  |  |  |  |  |  |
Available for sale: |  |  |  |  |  |  |
United States Government full faith and credit | $ | 4,590 |  |  | $ | 615 |  |  | $ | — |  |  | $ | 5,205 |
United States Government sponsored agencies | 1,939,562 |  |  | 19,661 |  |  | (486 | ) |  | 1,958,737 |
United States municipalities, states and territories | 3,096,008 |  |  | 475,456 |  |  | (2 | ) |  | 3,571,462 |
Foreign government obligations | 81,126 |  |  | 17,699 |  |  | — |  |  | 98,825 |
Corporate securities | 11,652,586 |  |  | 1,617,343 |  |  | (26,930 | ) |  | 13,242,999 |
Residential mortgage backed securities | 2,433,080 |  |  | 173,881 |  |  | (41,002 | ) |  | 2,565,959 |
Commercial mortgage backed securities | 78,682 |  |  | 260 |  |  | (30 | ) |  | 78,912 |
Other asset backed securities | 850,380 |  |  | 39,876 |  |  | (1,863 | ) |  | 888,393 |
| $ | 20,136,014 |  |  | $ | 2,344,791 |  |  | $ | (70,313 | ) |  | $ | 22,410,492 |
Held for investment: |  |  |  |  |  |  |
Corporate security | $ | 76,048 |  |  | $ | — |  |  | $ | (12,289 | ) |  | $ | 63,759 |
Equity securities, available for sale: |  |  |  |  |  |  |
Finance, insurance, and real estate | $ | 50,597 |  |  | $ | 12,164 |  |  | $ | (1,157 | ) |  | $ | 61,604 |
December 31, 2011 |  |  |  |  |  |  |
Fixed maturity securities: |  |  |  |  |  |  |
Available for sale: |  |  |  |  |  |  |
United States Government full faith and credit | $ | 4,084 |  |  | $ | 594 |  |  | $ | — |  |  | $ | 4,678 |
United States Government sponsored agencies | 1,780,401 |  |  | 19,378 |  |  | — |  |  | 1,799,779 |
United States municipalities, states and territories | 2,981,699 |  |  | 351,694 |  |  | (10 | ) |  | 3,333,383 |
Foreign government obligations | 60,809 |  |  | 7,766 |  |  | (242 | ) |  | 68,333 |
Corporate securities | 9,092,737 |  |  | 1,078,511 |  |  | (79,992 | ) |  | 10,091,256 |
Residential mortgage backed securities | 2,618,040 |  |  | 157,331 |  |  | (72,081 | ) |  | 2,703,290 |
Other asset backed securities | 442,509 |  |  | 26,492 |  |  | (5,611 | ) |  | 463,390 |
| $ | 16,980,279 |  |  | $ | 1,641,766 |  |  | $ | (157,936 | ) |  | $ | 18,464,109 |
Held for investment: |  |  |  |  |  |  |
United States Government sponsored agencies | $ | 2,568,274 |  |  | $ | 16,806 |  |  | $ | — |  |  | $ | 2,585,080 |
Corporate security | 75,932 |  |  | — |  |  | (16,590 | ) |  | 59,342 |
| $ | 2,644,206 |  |  | $ | 16,806 |  |  | $ | (16,590 | ) |  | $ | 2,644,422 |
Equity securities, available for sale: |  |  |  |  |  |  |
Finance, insurance, and real estate | $ | 58,438 |  |  | $ | 8,752 |  |  | $ | (4,345 | ) |  | $ | 62,845 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
| Available for sale |  | Held for investment
| Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
| (Dollars in thousands)
Due in one year or less | $ | 41,968 |  |  | $ | 43,181 |  |  | $ | — |  |  | $ | — |
Due after one year through five years | 623,552 |  |  | 700,154 |  |  | — |  |  | — |
Due after five years through ten years | 3,868,878 |  |  | 4,262,988 |  |  | — |  |  | — |
Due after ten years through twenty years | 5,294,593 |  |  | 5,820,676 |  |  | — |  |  | — |
Due after twenty years | 6,944,881 |  |  | 8,050,229 |  |  | 76,048 |  |  | 63,759 |
| 16,773,872 |  |  | 18,877,228 |  |  | 76,048 |  |  | 63,759 |
Residential mortgage backed securities | 2,433,080 |  |  | 2,565,959 |  |  | — |  |  | — |
Commercial mortgage backed securities | 78,682 |  |  | 78,912 |  |  | — |  |  | — |
Other asset backed securities | 850,380 |  |  | 888,393 |  |  | — |  |  | — |
| $ | 20,136,014 |  |  | $ | 22,410,492 |  |  | $ | 76,048 |  |  | $ | 63,759 |
Schedule of Components of Net Unrealized Gain/(Loss) on Availabe-for-sale Fixed Maturity and Equity Securities Reported as Seperate Component of Stockholders' Equity [Table Text Block] |
| September 30, 2012 |  | December 31, 2011
| (Dollars in thousands)
Net unrealized gains on available for sale fixed maturity securities and equity securities | $ | 2,285,485 |  |  | $ | 1,488,237 |
Adjustments for assumed changes in amortization of deferred policy acquisition costs and deferred sales inducements | (1,224,482 | ) |  | (819,476 | )
Deferred income tax valuation allowance reversal | 22,534 |  |  | 22,534 |
Deferred income tax benefit | (371,351 | ) |  | (234,066 | )
Net unrealized gains reported as accumulated other comprehensive income | $ | 712,186 |  |  | $ | 457,229 |
Schedule of Credit Quality of Fixed Maturity Security Portfolio by NAIC Designation [Table Text Block] |
|  | September 30, 2012 |  | December 31, 2011
NAIC Designation |  | Amortized Cost |  |  | Fair Value |  | Amortized Cost |  | Fair Value
|  | (Dollars in thousands)
1 |  | $ | 13,007,318 |  |  | $ | 14,591,003 |  |  | $ | 14,359,272 |  |  | $ | 15,486,571 |
2 |  | 6,846,088 |  |  | 7,538,539 |  |  | 4,894,739 |  |  | 5,272,759 |
3 |  | 319,697 |  |  | 304,463 |  |  | 335,642 |  |  | 315,406 |
4 |  | 31,719 |  |  | 32,361 |  |  | 26,674 |  |  | 23,989 |
5 |  | 4,451 |  |  | 4,006 |  |  | 4,932 |  |  | 5,756 |
6 |  | 2,789 |  |  | 3,879 |  |  | 3,226 |  |  | 4,050 |
|  | $ | 20,212,062 |  |  | $ | 22,474,251 |  |  | $ | 19,624,485 |  |  | $ | 21,108,531 |
Schedule of Unrealized Loss on Investments [Table Text Block] |
| Less than 12 months |  | 12 months or more |  | Total
| Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
| (Dollars in thousands)
September 30, 2012 |  |  |  |  |  |  |  |  |  |  |
Fixed maturity securities: |  |  |  |  |  |  |  |  |  |  |
Available for sale: |  |  |  |  |  |  |  |  |  |  |
United States Government sponsored agencies | $ | 483,280 |  |  | $ | (486 | ) |  | $ | — |  |  | $ | — |  |  | $ | 483,280 |  |  | $ | (486 | )
United States municipalities, states and territories | 271 |  |  | (2 | ) |  | — |  |  | — |  |  | 271 |  |  | (2 | )
Corporate securities: |  |  |  |  |  |  |  |  |  |  |
Finance, insurance and real estate | 139,777 |  |  | (2,670 | ) |  | 130,932 |  |  | (10,981 | ) |  | 270,709 |  |  | (13,651 | )
Manufacturing, construction and mining | 118,741 |  |  | (1,445 | ) |  | 20,948 |  |  | (2,315 | ) |  | 139,689 |  |  | (3,760 | )
Utilities and related sectors | 63,822 |  |  | (549 | ) |  | 50,043 |  |  | (7,868 | ) |  | 113,865 |  |  | (8,417 | )
Wholesale/retail trade | 12,368 |  |  | (447 | ) |  | 9,900 |  |  | (561 | ) |  | 22,268 |  |  | (1,008 | )
Services, media and other | 5,929 |  |  | (94 | ) |  | — |  |  | — |  |  | 5,929 |  |  | (94 | )
Residential mortgage backed securities | 168,342 |  |  | (7,091 | ) |  | 404,344 |  |  | (33,911 | ) |  | 572,686 |  |  | (41,002 | )
Commercial mortgage backed securities | 18,419 |  |  | (30 | ) |  | — |  |  | — |  |  | 18,419 |  |  | (30 | )
Other asset backed securities | 25,250 |  |  | (448 | ) |  | 31,027 |  |  | (1,415 | ) |  | 56,277 |  |  | (1,863 | )
| $ | 1,036,199 |  |  | $ | (13,262 | ) |  | $ | 647,194 |  |  | $ | (57,051 | ) |  | $ | 1,683,393 |  |  | $ | (70,313 | )
Held for investment: |  |  |  |  |  |  |  |  |  |  |
Corporate security: |  |  |  |  |  |  |  |  |  |  |
Insurance | $ | — |  |  | $ | — |  |  | $ | 63,759 |  |  | $ | (12,289 | ) |  | $ | 63,759 |  |  | $ | (12,289 | )
Equity securities, available for sale: |  |  |  |  |  |  |  |  |  |  |
Services, media and other | $ | 8,968 |  |  | $ | (1,157 | ) |  | $ | — |  |  | $ | — |  |  | $ | 8,968 |  |  | $ | (1,157 | )
December 31, 2011 |  |  |  |  |  |  |  |  |  |  |
Fixed maturity securities: |  |  |  |  |  |  |  |  |  |  |
Available for sale: |  |  |  |  |  |  |  |  |  |  |
United States municipalities, states and territories | $ | 3,535 |  |  | $ | (10 | ) |  | $ | — |  |  | $ | — |  |  | $ | 3,535 |  |  | $ | (10 | )
Foreign government obligations | — |  |  | — |  |  | 14,282 |  |  | (242 | ) |  | 14,282 |  |  | (242 | )
Corporate securities: |  |  |  |  |  |  |  |  |  |  |
Finance, insurance and real estate | 363,909 |  |  | (36,575 | ) |  | 146,354 |  |  | (15,611 | ) |  | 510,263 |  |  | (52,186 | )
Manufacturing, construction and mining | 201,762 |  |  | (7,131 | ) |  | 15,593 |  |  | (1,627 | ) |  | 217,355 |  |  | (8,758 | )
Utilities and related sectors | 174,251 |  |  | (7,576 | ) |  | 37,778 |  |  | (6,946 | ) |  | 212,029 |  |  | (14,522 | )
Wholesale/retail trade | 15,523 |  |  | (188 | ) |  | 9,275 |  |  | (1,194 | ) |  | 24,798 |  |  | (1,382 | )
Services, media and other | 27,688 |  |  | (249 | ) |  | 17,105 |  |  | (2,895 | ) |  | 44,793 |  |  | (3,144 | )
Residential mortgage backed securities | 295,352 |  |  | (19,920 | ) |  | 709,612 |  |  | (52,161 | ) |  | 1,004,964 |  |  | (72,081 | )
Other asset backed securities | 115,542 |  |  | (2,863 | ) |  | 15,550 |  |  | (2,748 | ) |  | 131,092 |  |  | (5,611 | )
| $ | 1,197,562 |  |  | $ | (74,512 | ) |  | $ | 965,549 |  |  | $ | (83,424 | ) |  | $ | 2,163,111 |  |  | $ | (157,936 | )
Held for investment: |  |  |  |  |  |  |  |  |  |  |
Corporate security: |  |  |  |  |  |  |  |  |  |  |
Insurance | $ | — |  |  | $ | — |  |  | $ | 59,342 |  |  | $ | (16,590 | ) |  | $ | 59,342 |  |  | $ | (16,590 | )
Equity securities, available for sale: |  |  |  |  |  |  |  |  |  |  |
Finance, insurance and real estate | $ | 20,028 |  |  | $ | (3,095 | ) |  | $ | 3,750 |  |  | $ | (1,250 | ) |  | $ | 23,778 |  |  | $ | (4,345 | )
Unrealized Gain (Loss) on Investments [Table Text Block] |
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2012 |  | 2011 |  | 2012 |  | 2011
|  |  |  |  | (Dollars in thousands)
Fixed maturity securities held for investment carried at amortized cost | $ | (626 | ) |  | $ | 22,325 |  |  | $ | (12,505 | ) |  | $ | 51,727 |
Investments carried at fair value: |  |  |  |  |  |  |
Fixed maturity securities, available for sale | $ | 402,274 |  |  | $ | 1,094,823 |  |  | $ | 790,648 |  |  | $ | 1,245,506 |
Equity securities, available for sale | 2,963 |  |  | (1,212 | ) |  | 6,600 |  |  | 1,428 |
| 405,237 |  |  | 1,093,611 |  |  | 797,248 |  |  | 1,246,934 |
Adjustment for effect on other balance sheet accounts: |  |  |  |  |  |  |
Deferred policy acquisition costs and deferred sales inducements | (201,676 | ) |  | (584,029 | ) |  | (405,006 | ) |  | (673,257 | )
Deferred income tax asset | (71,247 | ) |  | (178,354 | ) |  | (137,285 | ) |  | (200,787 | )
| (272,923 | ) |  | (762,383 | ) |  | (542,291 | ) |  | (874,044 | )
Increase in net unrealized gains on investments carried at fair value | $ | 132,314 |  |  | $ | 331,228 |  |  | $ | 254,957 |  |  | $ | 372,890 |
Realized Gain (Loss) on Investments [Table Text Block] |
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2012 |  | 2011 |  | 2012 |  | 2011
| (Dollars in thousands)
Available for sale fixed maturity securities: |  |  |  |  |  |  |
Gross realized gains | $ | 3,028 |  |  | $ | 169 |  |  | $ | 8,076 |  |  | $ | 4,711 |
Gross realized losses | (180 | ) |  | — |  |  | (535 | ) |  | (1,423 | )
| 2,848 |  |  | 169 |  |  | 7,541 |  |  | 3,288 |
Equity securities: |  |  |  |  |  |  |
Gross realized gains | — |  |  | — |  |  | 562 |  |  | 966 |
Other investments: |  |  |  |  |  |  |
Gain (loss) on sale of real estate | 53 |  |  | — |  |  | 2,948 |  |  | — |
Impairment losses on real estate | (830 | ) |  | — |  |  | (3,473 | ) |  | (12 | )
| (777 | ) |  | — |  |  | (525 | ) |  | (12 | )
Mortgage loans on real estate: |  |  |  |  |  |  |
Increase in allowance for credit losses | (3,309 | ) |  | (17,461 | ) |  | (15,503 | ) |  | (23,581 | )
| $ | (1,238 | ) |  | $ | (17,292 | ) |  | $ | (7,925 | ) |  | $ | (19,339 | )
Significant Assumptions in Determining Credit Loss Component of Other Than Temporary Impairments on Residential Mortgage Backed Scurities [Table Text Block] |
|  |  |  | Discount Rate |  | Default Rate |  | Loss Severity
Sector |  | Vintage |  | Min |  | Max |  | Min |  | Max |  | Min |  | Max
Nine months ended September 30, 2012
Prime |  | 2005 |  | 6.5 | % |  | 7.7 | % |  | 9 | % |  | 18 | % |  | 50 | % |  | 50 | %
|  | 2006 |  | 5.8 | % |  | 7.4 | % |  | 9 | % |  | 19 | % |  | 40 | % |  | 55 | %
|  | 2007 |  | 6.2 | % |  | 7.3 | % |  | 11 | % |  | 38 | % |  | 40 | % |  | 60 | %
Alt-A |  | 2005 |  | 5.6 | % |  | 8.7 | % |  | 12 | % |  | 27 | % |  | 5 | % |  | 55 | %
|  | 2006 |  | 6.0 | % |  | 6.0 | % |  | 32 | % |  | 46 | % |  | 55 | % |  | 60 | %
|  | 2007 |  | 6.2 | % |  | 7.0 | % |  | 31 | % |  | 55 | % |  | 55 | % |  | 60 | %
Nine months ended September 30, 2011
Prime |  | 2005 |  | 5.8 | % |  | 7.7 | % |  | 6 | % |  | 13 | % |  | 45 | % |  | 55 | %
|  | 2006 |  | 6.4 | % |  | 7.6 | % |  | 8 | % |  | 14 | % |  | 45 | % |  | 60 | %
|  | 2007 |  | 5.8 | % |  | 7.9 | % |  | 8 | % |  | 30 | % |  | 40 | % |  | 60 | %
Alt-A |  | 2005 |  | 5.8 | % |  | 7.7 | % |  | 11 | % |  | 25 | % |  | 5 | % |  | 55 | %
|  | 2006 |  | 6.0 | % |  | 6.5 | % |  | 23 | % |  | 33 | % |  | 50 | % |  | 55 | %
|  | 2007 |  | 6.2 | % |  | 7.4 | % |  | 29 | % |  | 41 | % |  | 50 | % |  | 70 | %
Other Than Temporary Impairment by Asset Type [Table Text Block] |
| Number of Securities |  |  | Total OTTI Losses |  |  | Portion of OTTI Losses Recognized from Other Comprehensive Income |  | Net OTTI Losses Recognized in Operations |
|  |  | (Dollars in thousands)
Three months ended September 30, 2012 |  |  |  |  |  |  |
Fixed maturity securities, available for sale: |  |  |  |  |  |  |
Residential mortgage backed securities | 4 |  |  | $ | — |  |  | $ | (1,686 | ) |  | $ | (1,686 | )
Three months ended September 30, 2011 |  |  |  |  |  |  |
Fixed maturity securities, available for sale: |  |  |  |  |  |  |
Residential mortgage backed securities | 37 |  |  | $ | (5,133 | ) |  | $ | (3,758 | ) |  | $ | (8,891 | )
Nine months ended September 30, 2012 |  |  |  |  |  |  |
Fixed maturity securities, available for sale: |  |  |  |  |  |  |
Residential mortgage backed securities | 24 |  |  | $ | (2,156 | ) |  | $ | (3,389 | ) |  | $ | (5,545 | )
Nine months ended September 30, 2011 |  |  |  |  |  |  |
Fixed maturity securities, available for sale: |  |  |  |  |  |  |
Residential mortgage backed securities | 47 |  |  | $ | (10,346 | ) |  | $ | (7,345 | ) |  | $ | (17,691 | )
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block] |
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2012 |  | 2011 |  | 2012 |  | 2011
| (Dollars in thousands)
Cumulative credit loss at beginning of period | $ | (122,954 | ) |  | $ | (104,480 | ) |  | $ | (119,095 | ) |  | $ | (96,893 | )
Credit losses on securities for which OTTI has not previously been recognized | — |  |  | (1,243 | ) |  | (47 | ) |  | (2,032 | )
Additional credit losses on securities for which OTTI has previously been recognized | (1,686 | ) |  | (7,648 | ) |  | (5,498 | ) |  | (15,659 | )
Accumulated losses on securities that were disposed of during the period | — |  |  | — |  |  | — |  |  | 1,213 |
Cumulative credit loss at end of period | $ | (124,640 | ) |  | $ | (113,371 | ) |  | $ | (124,640 | ) |  | $ | (113,371 | )
Schedule of Temporary Impairment Losses, Investments [Table Text Block] |
| Amortized Cost |  | OTTI Recognized in Other Comprehensive Income |  | Change in Fair Value Since OTTI was Recognized |  | Fair Value
| (Dollars in thousands)
September 30, 2012 |  |  |  |  |  |  |
Fixed maturity securities, available for sale: |  |  |  |  |  |  |
Corporate securities | $ | 3,515 |  |  | $ | (2,151 | ) |  | $ | 5,651 |  |  | $ | 7,015 |
Residential mortgage backed securities | 899,116 |  |  | (183,737 | ) |  | 166,604 |  |  | 881,983 |
Equity securities, available for sale: |  |  |  |  |  |  |
Finance, insurance and real estate | 9,976 |  |  | — |  |  | 11,501 |  |  | 21,477 |
| $ | 912,607 |  |  | $ | (185,888 | ) |  | $ | 183,756 |  |  | $ | 910,475 |
December 31, 2011 |  |  |  |  |  |  |
Fixed maturity securities, available for sale: |  |  |  |  |  |  |
Corporate securities | $ | 3,347 |  |  | $ | (2,151 | ) |  | $ | 4,818 |  |  | $ | 6,014 |
Residential mortgage backed securities | 999,024 |  |  | (187,126 | ) |  | 125,502 |  |  | 937,400 |
Equity securities, available for sale: |  |  |  |  |  |  |
Finance, insurance and real estate | 12,019 |  |  | — |  |  | 8,110 |  |  | 20,129 |
| $ | 1,014,390 |  |  | $ | (189,277 | ) |  | $ | 138,430 |  |  | $ | 963,543 |

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- Definition Tabular disclosure of the amount of other than temporary impairment (OTTI) related to credit losses recognized in earnings including: (a) the beginning balance of the amount related to credit losses on debt securities held by the investor at the beginning of the period for which a portion of an OTTI was recognized in other comprehensive income; (b) additions for the amount related to the credit loss for which an OTTI was not previously recognized; (c) reductions for securities sold during the period (realized); (d) reductions for securities for which the amount previously recognized in other comprehensive income was recognized in earnings because the investor intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis; (e) additional increases to the amount related to the credit loss for which an OTTI was previously recognized when the investor does not intend to sell the security and it is not more likely than not that the investor will be required to sell the security before recovery of its amortized cost basis; (f) reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security; and (g) the ending balance of the amount related to credit losses on debt securities held by the entity at the end of the period for which a portion of an OTTI was recognized in other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Section 50 -Paragraph 8 -SubTopic 10 -Topic 320 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27340-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 18B -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Tabular disclosure of realized gains and losses on investments reported in the statement of income. + References No definition available. + Details
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- Definition Tabular disclosure of investments in an unrealized loss position for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), including: (a) the aggregate related fair value of investments with unrealized losses, (b) the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 320 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 6 -Section 50 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 + Details
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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 320 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 6 -Section 50 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 + Details
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